diff --git a/.ci_files/rgb.patch b/.ci_files/rgb.patch
index a9908125f..ad0a8d80d 100644
--- a/.ci_files/rgb.patch
+++ b/.ci_files/rgb.patch
@@ -527,7 +527,7 @@ index 0000000..572e1df
 +
 +void SK6805_update(void) {
 +    SK6805_init();
-+    furi_kernel_lock();
++    FURI_CRITICAL_ENTER();
 +    uint32_t end;
 +    /* Последовательная отправка цветов светодиодов */
 +    for(uint8_t lednumber = 0; lednumber < SK6805_LED_COUNT; lednumber++) {
@@ -567,7 +567,7 @@ index 0000000..572e1df
 +            }
 +        }
 +    }
-+    furi_kernel_unlock();
++    FURI_CRITICAL_EXIT();
 +}
 diff --git a/lib/drivers/SK6805.h b/lib/drivers/SK6805.h
 new file mode 100644
diff --git a/applications/services/expansion/expansion.c b/applications/services/expansion/expansion.c
index 5b834b48d..9c64d0b5a 100644
--- a/applications/services/expansion/expansion.c
+++ b/applications/services/expansion/expansion.c
@@ -18,6 +18,7 @@ typedef enum {
     ExpansionStateDisabled,
     ExpansionStateEnabled,
     ExpansionStateRunning,
+    ExpansionStateConnectionEstablished,
 } ExpansionState;
 
 typedef enum {
@@ -26,10 +27,15 @@ typedef enum {
     ExpansionMessageTypeSetListenSerial,
     ExpansionMessageTypeModuleConnected,
     ExpansionMessageTypeModuleDisconnected,
+    ExpansionMessageTypeConnectionEstablished,
+    ExpansionMessageTypeIsConnected,
 } ExpansionMessageType;
 
 typedef union {
-    FuriHalSerialId serial_id;
+    union {
+        FuriHalSerialId serial_id;
+        bool* is_connected;
+    };
 } ExpansionMessageData;
 
 typedef struct {
@@ -68,13 +74,21 @@ static void expansion_detect_callback(void* context) {
     UNUSED(status);
 }
 
-static void expansion_worker_callback(void* context) {
+static void expansion_worker_callback(void* context, ExpansionWorkerCallbackReason reason) {
     furi_assert(context);
     Expansion* instance = context;
 
-    ExpansionMessage message = {
-        .type = ExpansionMessageTypeModuleDisconnected,
-        .api_lock = NULL, // Not locking the API here to avoid a deadlock
+    ExpansionMessage message;
+    switch(reason) {
+    case ExpansionWorkerCallbackReasonExit:
+        message.type = ExpansionMessageTypeModuleDisconnected;
+        message.api_lock = NULL; // Not locking the API here to avoid a deadlock
+        break;
+
+    case ExpansionWorkerCallbackReasonConnected:
+        message.type = ExpansionMessageTypeConnectionEstablished;
+        message.api_lock = api_lock_alloc_locked();
+        break;
     };
 
     const FuriStatus status = furi_message_queue_put(instance->queue, &message, FuriWaitForever);
@@ -105,7 +119,9 @@ static void
 
     if(instance->state == ExpansionStateDisabled) {
         return;
-    } else if(instance->state == ExpansionStateRunning) {
+    } else if(
+        instance->state == ExpansionStateRunning ||
+        instance->state == ExpansionStateConnectionEstablished) {
         expansion_worker_stop(instance->worker);
         expansion_worker_free(instance->worker);
     } else {
@@ -122,7 +138,8 @@ static void expansion_control_handler_set_listen_serial(
     const ExpansionMessageData* data) {
     furi_check(data->serial_id < FuriHalSerialIdMax);
 
-    if(instance->state == ExpansionStateRunning) {
+    if(instance->state == ExpansionStateRunning ||
+       instance->state == ExpansionStateConnectionEstablished) {
         expansion_worker_stop(instance->worker);
         expansion_worker_free(instance->worker);
 
@@ -160,7 +177,8 @@ static void expansion_control_handler_module_disconnected(
     Expansion* instance,
     const ExpansionMessageData* data) {
     UNUSED(data);
-    if(instance->state != ExpansionStateRunning) {
+    if(instance->state != ExpansionStateRunning &&
+       instance->state != ExpansionStateConnectionEstablished) {
         return;
     }
 
@@ -170,6 +188,23 @@ static void expansion_control_handler_module_disconnected(
         instance->serial_id, expansion_detect_callback, instance);
 }
 
+static void expansion_control_handler_connection_established(
+    Expansion* instance,
+    const ExpansionMessageData* data) {
+    UNUSED(data);
+    if(instance->state != ExpansionStateRunning &&
+       instance->state != ExpansionStateConnectionEstablished) {
+        return;
+    }
+
+    instance->state = ExpansionStateConnectionEstablished;
+}
+
+static void
+    expansion_control_handler_is_connected(Expansion* instance, const ExpansionMessageData* data) {
+    *data->is_connected = instance->state == ExpansionStateConnectionEstablished;
+}
+
 typedef void (*ExpansionControlHandler)(Expansion*, const ExpansionMessageData*);
 
 static const ExpansionControlHandler expansion_control_handlers[] = {
@@ -178,6 +213,8 @@ static const ExpansionControlHandler expansion_control_handlers[] = {
     [ExpansionMessageTypeSetListenSerial] = expansion_control_handler_set_listen_serial,
     [ExpansionMessageTypeModuleConnected] = expansion_control_handler_module_connected,
     [ExpansionMessageTypeModuleDisconnected] = expansion_control_handler_module_disconnected,
+    [ExpansionMessageTypeConnectionEstablished] = expansion_control_handler_connection_established,
+    [ExpansionMessageTypeIsConnected] = expansion_control_handler_is_connected,
 };
 
 static int32_t expansion_control(void* context) {
@@ -249,6 +286,22 @@ void expansion_disable(Expansion* instance) {
     api_lock_wait_unlock_and_free(message.api_lock);
 }
 
+bool expansion_is_connected(Expansion* instance) {
+    furi_check(instance);
+    bool is_connected;
+
+    ExpansionMessage message = {
+        .type = ExpansionMessageTypeIsConnected,
+        .data.is_connected = &is_connected,
+        .api_lock = api_lock_alloc_locked(),
+    };
+
+    furi_message_queue_put(instance->queue, &message, FuriWaitForever);
+    api_lock_wait_unlock_and_free(message.api_lock);
+
+    return is_connected;
+}
+
 void expansion_set_listen_serial(Expansion* instance, FuriHalSerialId serial_id) {
     furi_check(instance);
     furi_check(serial_id < FuriHalSerialIdMax);
diff --git a/applications/services/expansion/expansion.h b/applications/services/expansion/expansion.h
index e169b3c15..1b0879b1e 100644
--- a/applications/services/expansion/expansion.h
+++ b/applications/services/expansion/expansion.h
@@ -50,6 +50,15 @@ void expansion_enable(Expansion* instance);
  */
 void expansion_disable(Expansion* instance);
 
+/**
+ * @brief Check if an expansion module is connected.
+ *
+ * @param[in,out] instance pointer to the Expansion instance.
+ *
+ * @returns true if the module is connected and initialized, false otherwise.
+ */
+bool expansion_is_connected(Expansion* instance);
+
 /**
  * @brief Enable support for expansion modules on designated serial port.
  *
diff --git a/applications/services/expansion/expansion_worker.c b/applications/services/expansion/expansion_worker.c
index fd92063d2..4047212eb 100644
--- a/applications/services/expansion/expansion_worker.c
+++ b/applications/services/expansion/expansion_worker.c
@@ -223,6 +223,7 @@ static bool expansion_worker_handle_state_handshake(
 
         if(furi_hal_serial_is_baud_rate_supported(instance->serial_handle, baud_rate)) {
             instance->state = ExpansionWorkerStateConnected;
+            instance->callback(instance->cb_context, ExpansionWorkerCallbackReasonConnected);
             // Send response at previous baud rate
             if(!expansion_worker_send_status_response(instance, ExpansionFrameErrorNone)) break;
             furi_hal_serial_set_br(instance->serial_handle, baud_rate);
@@ -351,7 +352,7 @@ static int32_t expansion_worker(void* context) {
 
     // Do not invoke worker callback on user-requested exit
     if((instance->exit_reason != ExpansionWorkerExitReasonUser) && (instance->callback != NULL)) {
-        instance->callback(instance->cb_context);
+        instance->callback(instance->cb_context, ExpansionWorkerCallbackReasonExit);
     }
 
     return 0;
diff --git a/applications/services/expansion/expansion_worker.h b/applications/services/expansion/expansion_worker.h
index 761f79c1d..faab2887f 100644
--- a/applications/services/expansion/expansion_worker.h
+++ b/applications/services/expansion/expansion_worker.h
@@ -17,14 +17,20 @@
  */
 typedef struct ExpansionWorker ExpansionWorker;
 
+typedef enum {
+    ExpansionWorkerCallbackReasonExit,
+    ExpansionWorkerCallbackReasonConnected,
+} ExpansionWorkerCallbackReason;
+
 /**
  * @brief Worker callback type.
  *
  * @see expansion_worker_set_callback()
  *
  * @param[in,out] context pointer to a user-defined object.
+ * @param[in] reason reason for the callback.
  */
-typedef void (*ExpansionWorkerCallback)(void* context);
+typedef void (*ExpansionWorkerCallback)(void* context, ExpansionWorkerCallbackReason reason);
 
 /**
  * @brief Create an expansion worker instance.
diff --git a/applications/system/js_app/application.fam b/applications/system/js_app/application.fam
index b586f1623..0b9b1f51f 100644
--- a/applications/system/js_app/application.fam
+++ b/applications/system/js_app/application.fam
@@ -47,3 +47,42 @@ App(
     requires=["js_app"],
     sources=["modules/js_usbdisk/*.c"],
 )
+
+App(
+    appid="js_submenu",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="js_submenu_ep",
+    requires=["js_app"],
+    sources=["modules/js_submenu.c"],
+)
+
+App(
+    appid="js_blebeacon",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="js_blebeacon_ep",
+    requires=["js_app"],
+    sources=["modules/js_blebeacon.c"],
+)
+
+App(
+    appid="js_math",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="js_math_ep",
+    requires=["js_app"],
+    sources=["modules/js_math.c"],
+)
+
+App(
+    appid="js_keyboard",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="js_keyboard_ep",
+    requires=["js_app"],
+    sources=["modules/js_keyboard.c"],
+)
+App(
+    appid="js_subghz",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="js_subghz_ep",
+    requires=["js_app"],
+    sources=["modules/js_subghz/*.c"],
+)
diff --git a/applications/system/js_app/examples/apps/Scripts/blebeacon.js b/applications/system/js_app/examples/apps/Scripts/blebeacon.js
new file mode 100644
index 000000000..53983a745
--- /dev/null
+++ b/applications/system/js_app/examples/apps/Scripts/blebeacon.js
@@ -0,0 +1,59 @@
+let blebeacon = require("blebeacon");
+
+// Stop if previous background beacon is active
+if (blebeacon.isActive()) {
+    blebeacon.stop();
+}
+
+// Make sure it resets at script exit, true will keep advertising in background
+// This is false by default, can be omitted
+blebeacon.keepAlive(false);
+
+
+let math = require("math");
+
+let currentIndex = 0;
+let watchValues = [
+    0x1A, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+    0x09, 0x0A, 0x0B, 0x0C, 0x11, 0x12, 0x13, 0x14, 0x15,
+    0x16, 0x17, 0x18, 0xE4, 0xE5, 0x1B, 0x1C, 0x1D, 0x1E,
+    0x20, 0xEC, 0xEF
+];
+
+function generateRandomMac() {
+    let mac = [];
+    for (let i = 0; i < 6; i++) {
+        mac.push(math.floor(math.random() * 256));
+    }
+    return Uint8Array(mac);
+}
+
+function sendRandomModelAdvertisement() {
+    let model = watchValues[currentIndex];
+
+    let packet = [
+        14, 0xFF, 0x75, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x01, 0xFF, 0x00, 0x00, 0x43,
+        model
+    ];
+
+    let intervalMs = 50;
+
+    // Power level, min interval and max interval are optional
+    blebeacon.setConfig(generateRandomMac(), 0x1F, intervalMs, intervalMs * 3);
+
+    blebeacon.setData(Uint8Array(packet));
+
+    blebeacon.start();
+
+    print("Sent data for model ID " + to_string(model));
+
+    currentIndex = (currentIndex + 1) % watchValues.length;
+
+    delay(intervalMs);
+
+    blebeacon.stop();
+}
+
+while (true) {
+    sendRandomModelAdvertisement();
+}
\ No newline at end of file
diff --git a/applications/system/js_app/examples/apps/Scripts/keyboard.js b/applications/system/js_app/examples/apps/Scripts/keyboard.js
new file mode 100644
index 000000000..a34607c29
--- /dev/null
+++ b/applications/system/js_app/examples/apps/Scripts/keyboard.js
@@ -0,0 +1,19 @@
+let keyboard = require("keyboard");
+
+keyboard.setHeader("Example Text Input");
+
+// Default text is optional
+let text = keyboard.text(100, "Default text", true);
+print("Got text:", text);
+
+keyboard.setHeader("Example Byte Input");
+
+// Default data is optional
+let data = keyboard.byte(6, Uint8Array([1, 2, 3, 4, 5, 6]));
+data = Uint8Array(data);
+let result = "0x";
+for (let i = 0; i < data.byteLength; i++) {
+    if (data[i] < 0x10) result += "0";
+    result += to_hex_string(data[i]);
+}
+print("Got data:", result);
\ No newline at end of file
diff --git a/applications/system/js_app/examples/apps/Scripts/math.js b/applications/system/js_app/examples/apps/Scripts/math.js
new file mode 100644
index 000000000..49212f904
--- /dev/null
+++ b/applications/system/js_app/examples/apps/Scripts/math.js
@@ -0,0 +1,47 @@
+let math = require("math");
+
+let absResult = math.abs(-5);
+let acosResult = math.acos(0.5);
+let acoshResult = math.acosh(2);
+let asinResult = math.asin(0.5);
+let asinhResult = math.asinh(2);
+let atanResult = math.atan(1);
+let atan2Result = math.atan2(1, 1);
+let atanhResult = math.atanh(0.5);
+let cbrtResult = math.cbrt(27);
+let ceilResult = math.ceil(5.3);
+let clz32Result = math.clz32(1);
+let cosResult = math.cos(math.PI);
+let expResult = math.exp(1);
+let floorResult = math.floor(5.7);
+let maxResult = math.max(3, 5);
+let minResult = math.min(3, 5);
+let powResult = math.pow(2, 3);
+let randomResult = math.random();
+let signResult = math.sign(-5);
+let sinResult = math.sin(math.PI / 2);
+let sqrtResult = math.sqrt(25);
+let truncResult = math.trunc(5.7);
+
+print("math.abs(-5):", absResult);
+print("math.acos(0.5):", acosResult);
+print("math.acosh(2):", acoshResult);
+print("math.asin(0.5):", asinResult);
+print("math.asinh(2):", asinhResult);
+print("math.atan(1):", atanResult);
+print("math.atan2(1, 1):", atan2Result);
+print("math.atanh(0.5):", atanhResult);
+print("math.cbrt(27):", cbrtResult);
+print("math.ceil(5.3):", ceilResult);
+print("math.clz32(1):", clz32Result);
+print("math.cos(math.PI):", cosResult);
+print("math.exp(1):", expResult);
+print("math.floor(5.7):", floorResult);
+print("math.max(3, 5):", maxResult);
+print("math.min(3, 5):", minResult);
+print("math.pow(2, 3):", powResult);
+print("math.random():", randomResult);
+print("math.sign(-5):", signResult);
+print("math.sin(math.PI/2):", sinResult);
+print("math.sqrt(25):", sqrtResult);
+print("math.trunc(5.7):", truncResult);
\ No newline at end of file
diff --git a/applications/system/js_app/examples/apps/Scripts/subghz.js b/applications/system/js_app/examples/apps/Scripts/subghz.js
new file mode 100644
index 000000000..39dadf070
--- /dev/null
+++ b/applications/system/js_app/examples/apps/Scripts/subghz.js
@@ -0,0 +1,37 @@
+let subghz = require("subghz");
+subghz.setup();
+
+function printRXline() {
+    if (subghz.getState() !== "RX") {
+        subghz.setRx(); // to RX
+    }
+
+    let rssi = subghz.getRssi();
+    let freq = subghz.getFrequency();
+    let ext = subghz.isExternal();
+
+    print("rssi: ", rssi, "dBm", "@", freq, "MHz", "ext: ", ext);
+}
+
+function changeFrequency(freq) {
+    if (subghz.getState() !== "IDLE") {
+        subghz.setIdle(); // need to be idle to change frequency
+    }
+    subghz.setFrequency(freq);
+}
+
+subghz.setIdle();
+print(subghz.getState()); // "IDLE"
+subghz.setRx();
+print(subghz.getState()); // "RX"
+
+changeFrequency(433920000);
+printRXline();
+delay(1000);
+
+let result = subghz.transmitFile("/ext/subghz/0.sub");
+print(result ? "Send success" : "Send failed");
+delay(1000);
+
+changeFrequency(315000000);
+printRXline();
\ No newline at end of file
diff --git a/applications/system/js_app/examples/apps/Scripts/submenu.js b/applications/system/js_app/examples/apps/Scripts/submenu.js
new file mode 100644
index 000000000..6744ca452
--- /dev/null
+++ b/applications/system/js_app/examples/apps/Scripts/submenu.js
@@ -0,0 +1,11 @@
+let submenu = require("submenu");
+
+submenu.addItem("Item 1", 0);
+submenu.addItem("Item 2", 1);
+submenu.addItem("Item 3", 2);
+
+submenu.setHeader("Select an option:");
+
+let result = submenu.show();
+
+print("Result:", result);
diff --git a/applications/system/js_app/modules/js_blebeacon.c b/applications/system/js_app/modules/js_blebeacon.c
new file mode 100644
index 000000000..4d19accb1
--- /dev/null
+++ b/applications/system/js_app/modules/js_blebeacon.c
@@ -0,0 +1,245 @@
+#include "../js_modules.h"
+#include <furi_hal_bt.h>
+#include <extra_beacon.h>
+
+typedef struct {
+    bool saved_prev_cfg;
+    bool prev_cfg_set;
+    GapExtraBeaconConfig prev_cfg;
+
+    bool saved_prev_data;
+    uint8_t prev_data[EXTRA_BEACON_MAX_DATA_SIZE];
+    uint8_t prev_data_len;
+
+    bool saved_prev_active;
+    bool prev_active;
+
+    bool keep_alive;
+} JsBlebeaconInst;
+
+static JsBlebeaconInst* get_this_ctx(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsBlebeaconInst* storage = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(storage);
+    return storage;
+}
+
+static void ret_bad_args(struct mjs* mjs, const char* error) {
+    mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "%s", error);
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void ret_int_err(struct mjs* mjs, const char* error) {
+    mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "%s", error);
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static bool check_arg_count(struct mjs* mjs, size_t count) {
+    size_t num_args = mjs_nargs(mjs);
+    if(num_args != count) {
+        ret_bad_args(mjs, "Wrong argument count");
+        return false;
+    }
+    return true;
+}
+
+static bool get_int_arg(struct mjs* mjs, size_t index, uint8_t* value, bool error) {
+    mjs_val_t int_obj = mjs_arg(mjs, index);
+    if(!mjs_is_number(int_obj)) {
+        if(error) ret_bad_args(mjs, "Argument must be a number");
+        return false;
+    }
+    *value = mjs_get_int(mjs, int_obj);
+    return true;
+}
+
+static void js_blebeacon_is_active(struct mjs* mjs) {
+    JsBlebeaconInst* blebeacon = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 0)) return;
+    UNUSED(blebeacon);
+
+    mjs_return(mjs, mjs_mk_boolean(mjs, furi_hal_bt_extra_beacon_is_active()));
+}
+
+static void js_blebeacon_set_config(struct mjs* mjs) {
+    JsBlebeaconInst* blebeacon = get_this_ctx(mjs);
+    if(mjs_nargs(mjs) < 1 || mjs_nargs(mjs) > 4) {
+        ret_bad_args(mjs, "Wrong argument count");
+        return;
+    }
+
+    char* mac = NULL;
+    size_t mac_len = 0;
+    mjs_val_t mac_arg = mjs_arg(mjs, 0);
+    if(mjs_is_typed_array(mac_arg)) {
+        if(mjs_is_data_view(mac_arg)) {
+            mac_arg = mjs_dataview_get_buf(mjs, mac_arg);
+        }
+        mac = mjs_array_buf_get_ptr(mjs, mac_arg, &mac_len);
+    }
+    if(!mac || mac_len != EXTRA_BEACON_MAC_ADDR_SIZE) {
+        ret_bad_args(mjs, "Wrong MAC address");
+        return;
+    }
+
+    uint8_t power = GapAdvPowerLevel_0dBm;
+    get_int_arg(mjs, 1, &power, false);
+    power = CLAMP(power, GapAdvPowerLevel_6dBm, GapAdvPowerLevel_Neg40dBm);
+
+    uint8_t intv_min = 50;
+    get_int_arg(mjs, 2, &intv_min, false);
+    intv_min = MAX(intv_min, 20);
+
+    uint8_t intv_max = 150;
+    get_int_arg(mjs, 3, &intv_max, false);
+    intv_max = MAX(intv_max, intv_min);
+
+    GapExtraBeaconConfig config = {
+        .min_adv_interval_ms = intv_min,
+        .max_adv_interval_ms = intv_max,
+        .adv_channel_map = GapAdvChannelMapAll,
+        .adv_power_level = power,
+        .address_type = GapAddressTypePublic,
+    };
+    memcpy(config.address, (uint8_t*)mac, sizeof(config.address));
+
+    if(!blebeacon->saved_prev_cfg) {
+        blebeacon->saved_prev_cfg = true;
+        const GapExtraBeaconConfig* prev_cfg_ptr = furi_hal_bt_extra_beacon_get_config();
+        if(prev_cfg_ptr) {
+            blebeacon->prev_cfg_set = true;
+            memcpy(&blebeacon->prev_cfg, prev_cfg_ptr, sizeof(blebeacon->prev_cfg));
+        } else {
+            blebeacon->prev_cfg_set = false;
+        }
+    }
+    if(!furi_hal_bt_extra_beacon_set_config(&config)) {
+        ret_int_err(mjs, "Failed setting beacon config");
+        return;
+    }
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_blebeacon_set_data(struct mjs* mjs) {
+    JsBlebeaconInst* blebeacon = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 1)) return;
+
+    char* data = NULL;
+    size_t data_len = 0;
+    mjs_val_t data_arg = mjs_arg(mjs, 0);
+    if(mjs_is_typed_array(data_arg)) {
+        if(mjs_is_data_view(data_arg)) {
+            data_arg = mjs_dataview_get_buf(mjs, data_arg);
+        }
+        data = mjs_array_buf_get_ptr(mjs, data_arg, &data_len);
+    }
+    if(!data) {
+        ret_bad_args(mjs, "Data must be a Uint8Array");
+        return;
+    }
+
+    if(!blebeacon->saved_prev_data) {
+        blebeacon->saved_prev_data = true;
+        blebeacon->prev_data_len = furi_hal_bt_extra_beacon_get_data(blebeacon->prev_data);
+    }
+    if(!furi_hal_bt_extra_beacon_set_data((uint8_t*)data, data_len)) {
+        ret_int_err(mjs, "Failed setting beacon data");
+        return;
+    }
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_blebeacon_start(struct mjs* mjs) {
+    JsBlebeaconInst* blebeacon = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 0)) return;
+
+    if(!blebeacon->saved_prev_active) {
+        blebeacon->saved_prev_active = true;
+        blebeacon->prev_active = furi_hal_bt_extra_beacon_is_active();
+    }
+    if(!furi_hal_bt_extra_beacon_start()) {
+        ret_int_err(mjs, "Failed starting beacon");
+        return;
+    }
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_blebeacon_stop(struct mjs* mjs) {
+    JsBlebeaconInst* blebeacon = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 0)) return;
+    UNUSED(blebeacon);
+
+    if(!blebeacon->saved_prev_active) {
+        blebeacon->saved_prev_active = true;
+        blebeacon->prev_active = furi_hal_bt_extra_beacon_is_active();
+    }
+    if(!furi_hal_bt_extra_beacon_stop()) {
+        ret_int_err(mjs, "Failed stopping beacon");
+        return;
+    }
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_blebeacon_keep_alive(struct mjs* mjs) {
+    JsBlebeaconInst* blebeacon = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 1)) return;
+
+    mjs_val_t bool_obj = mjs_arg(mjs, 0);
+    blebeacon->keep_alive = mjs_get_bool(mjs, bool_obj);
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void* js_blebeacon_create(struct mjs* mjs, mjs_val_t* object) {
+    JsBlebeaconInst* blebeacon = malloc(sizeof(JsBlebeaconInst));
+    mjs_val_t blebeacon_obj = mjs_mk_object(mjs);
+    mjs_set(mjs, blebeacon_obj, INST_PROP_NAME, ~0, mjs_mk_foreign(mjs, blebeacon));
+    mjs_set(mjs, blebeacon_obj, "isActive", ~0, MJS_MK_FN(js_blebeacon_is_active));
+    mjs_set(mjs, blebeacon_obj, "setConfig", ~0, MJS_MK_FN(js_blebeacon_set_config));
+    mjs_set(mjs, blebeacon_obj, "setData", ~0, MJS_MK_FN(js_blebeacon_set_data));
+    mjs_set(mjs, blebeacon_obj, "start", ~0, MJS_MK_FN(js_blebeacon_start));
+    mjs_set(mjs, blebeacon_obj, "stop", ~0, MJS_MK_FN(js_blebeacon_stop));
+    mjs_set(mjs, blebeacon_obj, "keepAlive", ~0, MJS_MK_FN(js_blebeacon_keep_alive));
+    *object = blebeacon_obj;
+    return blebeacon;
+}
+
+static void js_blebeacon_destroy(void* inst) {
+    JsBlebeaconInst* blebeacon = inst;
+    if(!blebeacon->keep_alive) {
+        if(furi_hal_bt_extra_beacon_is_active()) {
+            furi_check(furi_hal_bt_extra_beacon_stop());
+        }
+        if(blebeacon->saved_prev_cfg && blebeacon->prev_cfg_set) {
+            furi_check(furi_hal_bt_extra_beacon_set_config(&blebeacon->prev_cfg));
+        }
+        if(blebeacon->saved_prev_data) {
+            furi_check(
+                furi_hal_bt_extra_beacon_set_data(blebeacon->prev_data, blebeacon->prev_data_len));
+        }
+        if(blebeacon->prev_active) {
+            furi_check(furi_hal_bt_extra_beacon_start());
+        }
+    }
+    free(blebeacon);
+}
+
+static const JsModuleDescriptor js_blebeacon_desc = {
+    "blebeacon",
+    js_blebeacon_create,
+    js_blebeacon_destroy,
+};
+
+static const FlipperAppPluginDescriptor plugin_descriptor = {
+    .appid = PLUGIN_APP_ID,
+    .ep_api_version = PLUGIN_API_VERSION,
+    .entry_point = &js_blebeacon_desc,
+};
+
+const FlipperAppPluginDescriptor* js_blebeacon_ep(void) {
+    return &plugin_descriptor;
+}
\ No newline at end of file
diff --git a/applications/system/js_app/modules/js_keyboard.c b/applications/system/js_app/modules/js_keyboard.c
new file mode 100644
index 000000000..8958dcaf8
--- /dev/null
+++ b/applications/system/js_app/modules/js_keyboard.c
@@ -0,0 +1,195 @@
+#include "../js_modules.h"
+#include <gui/modules/text_input.h>
+#include <gui/modules/byte_input.h>
+#include <gui/view_dispatcher.h>
+
+#define membersof(x) (sizeof(x) / sizeof(x[0]))
+
+typedef struct {
+    char* data;
+    TextInput* text_input;
+    ByteInput* byte_input;
+    ViewDispatcher* view_dispatcher;
+    uint8_t* byteinput;
+} JsKeyboardInst;
+
+typedef enum {
+    JsKeyboardViewTextInput,
+    JsKeyboardViewByteInput,
+} JsKeyboardView;
+
+static void ret_bad_args(struct mjs* mjs, const char* error) {
+    mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "%s", error);
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static bool get_str_arg(struct mjs* mjs, size_t index, const char** value, bool error) {
+    mjs_val_t str_obj = mjs_arg(mjs, index);
+    if(!mjs_is_string(str_obj)) {
+        if(error) ret_bad_args(mjs, "Argument must be a string");
+        return false;
+    }
+    size_t str_len = 0;
+    *value = mjs_get_string(mjs, &str_obj, &str_len);
+    if((str_len == 0) || (*value == NULL)) {
+        if(error) ret_bad_args(mjs, "Bad string argument");
+        return false;
+    }
+    return true;
+}
+
+static bool get_int_arg(struct mjs* mjs, size_t index, size_t* value, bool error) {
+    mjs_val_t int_obj = mjs_arg(mjs, index);
+    if(!mjs_is_number(int_obj)) {
+        if(error) ret_bad_args(mjs, "Argument must be a number");
+        return false;
+    }
+    *value = mjs_get_int(mjs, int_obj);
+    return true;
+}
+
+static JsKeyboardInst* get_this_ctx(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsKeyboardInst* storage = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(storage);
+    return storage;
+}
+
+void text_input_callback(void* context) {
+    JsKeyboardInst* keyboard = (JsKeyboardInst*)context;
+    view_dispatcher_stop(keyboard->view_dispatcher);
+}
+
+void byte_input_callback(void* context) {
+    JsKeyboardInst* keyboard = (JsKeyboardInst*)context;
+    view_dispatcher_stop(keyboard->view_dispatcher);
+}
+
+static void js_keyboard_set_header(struct mjs* mjs) {
+    JsKeyboardInst* keyboard = get_this_ctx(mjs);
+
+    const char* header;
+    if(!get_str_arg(mjs, 0, &header, true)) return;
+
+    text_input_set_header_text(keyboard->text_input, header);
+    byte_input_set_header_text(keyboard->byte_input, header);
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_keyboard_text(struct mjs* mjs) {
+    JsKeyboardInst* keyboard = get_this_ctx(mjs);
+
+    size_t input_length;
+    if(!get_int_arg(mjs, 0, &input_length, true)) return;
+    char* buffer = malloc(input_length);
+
+    const char* default_text = "";
+    bool clear_default = false;
+    if(get_str_arg(mjs, 1, &default_text, false)) {
+        strlcpy(buffer, default_text, input_length);
+        mjs_val_t bool_obj = mjs_arg(mjs, 2);
+        clear_default = mjs_get_bool(mjs, bool_obj);
+    }
+
+    view_dispatcher_attach_to_gui(
+        keyboard->view_dispatcher, furi_record_open(RECORD_GUI), ViewDispatcherTypeFullscreen);
+    furi_record_close(RECORD_GUI);
+
+    text_input_set_result_callback(
+        keyboard->text_input, text_input_callback, keyboard, buffer, input_length, clear_default);
+
+    view_dispatcher_switch_to_view(keyboard->view_dispatcher, JsKeyboardViewTextInput);
+
+    view_dispatcher_run(keyboard->view_dispatcher);
+
+    text_input_reset(keyboard->text_input);
+
+    mjs_return(mjs, mjs_mk_string(mjs, buffer, ~0, true));
+    free(buffer);
+}
+
+static void js_keyboard_byte(struct mjs* mjs) {
+    JsKeyboardInst* keyboard = get_this_ctx(mjs);
+
+    size_t input_length;
+    if(!get_int_arg(mjs, 0, &input_length, true)) return;
+    uint8_t* buffer = malloc(input_length);
+
+    mjs_val_t default_data_arg = mjs_arg(mjs, 1);
+    if(mjs_is_typed_array(default_data_arg)) {
+        if(mjs_is_data_view(default_data_arg)) {
+            default_data_arg = mjs_dataview_get_buf(mjs, default_data_arg);
+        }
+        size_t default_data_len = 0;
+        char* default_data = mjs_array_buf_get_ptr(mjs, default_data_arg, &default_data_len);
+        memcpy(buffer, (uint8_t*)default_data, MIN((size_t)input_length, default_data_len));
+    }
+
+    view_dispatcher_attach_to_gui(
+        keyboard->view_dispatcher, furi_record_open(RECORD_GUI), ViewDispatcherTypeFullscreen);
+    furi_record_close(RECORD_GUI);
+
+    byte_input_set_result_callback(
+        keyboard->byte_input, byte_input_callback, NULL, keyboard, buffer, input_length);
+
+    view_dispatcher_switch_to_view(keyboard->view_dispatcher, JsKeyboardViewByteInput);
+
+    view_dispatcher_run(keyboard->view_dispatcher);
+
+    byte_input_set_result_callback(keyboard->byte_input, NULL, NULL, NULL, NULL, 0);
+    byte_input_set_header_text(keyboard->byte_input, "");
+
+    mjs_return(mjs, mjs_mk_array_buf(mjs, (char*)buffer, input_length));
+    free(buffer);
+}
+
+static void* js_keyboard_create(struct mjs* mjs, mjs_val_t* object) {
+    JsKeyboardInst* keyboard = malloc(sizeof(JsKeyboardInst));
+    mjs_val_t keyboard_obj = mjs_mk_object(mjs);
+    mjs_set(mjs, keyboard_obj, INST_PROP_NAME, ~0, mjs_mk_foreign(mjs, keyboard));
+    mjs_set(mjs, keyboard_obj, "setHeader", ~0, MJS_MK_FN(js_keyboard_set_header));
+    mjs_set(mjs, keyboard_obj, "text", ~0, MJS_MK_FN(js_keyboard_text));
+    mjs_set(mjs, keyboard_obj, "byte", ~0, MJS_MK_FN(js_keyboard_byte));
+    keyboard->byte_input = byte_input_alloc();
+    keyboard->text_input = text_input_alloc();
+    keyboard->view_dispatcher = view_dispatcher_alloc();
+    view_dispatcher_enable_queue(keyboard->view_dispatcher);
+    view_dispatcher_add_view(
+        keyboard->view_dispatcher,
+        JsKeyboardViewTextInput,
+        text_input_get_view(keyboard->text_input));
+    view_dispatcher_add_view(
+        keyboard->view_dispatcher,
+        JsKeyboardViewByteInput,
+        byte_input_get_view(keyboard->byte_input));
+    *object = keyboard_obj;
+    return keyboard;
+}
+
+static void js_keyboard_destroy(void* inst) {
+    JsKeyboardInst* keyboard = inst;
+    view_dispatcher_remove_view(keyboard->view_dispatcher, JsKeyboardViewByteInput);
+    byte_input_free(keyboard->byte_input);
+    view_dispatcher_remove_view(keyboard->view_dispatcher, JsKeyboardViewTextInput);
+    text_input_free(keyboard->text_input);
+    view_dispatcher_free(keyboard->view_dispatcher);
+    free(keyboard->data);
+    free(keyboard);
+}
+
+static const JsModuleDescriptor js_keyboard_desc = {
+    "keyboard",
+    js_keyboard_create,
+    js_keyboard_destroy,
+};
+
+static const FlipperAppPluginDescriptor plugin_descriptor = {
+    .appid = PLUGIN_APP_ID,
+    .ep_api_version = PLUGIN_API_VERSION,
+    .entry_point = &js_keyboard_desc,
+};
+
+const FlipperAppPluginDescriptor* js_keyboard_ep(void) {
+    return &plugin_descriptor;
+}
\ No newline at end of file
diff --git a/applications/system/js_app/modules/js_math.c b/applications/system/js_app/modules/js_math.c
new file mode 100644
index 000000000..80d97fb9c
--- /dev/null
+++ b/applications/system/js_app/modules/js_math.c
@@ -0,0 +1,309 @@
+#include "../js_modules.h"
+#include "furi_hal_random.h"
+
+#define JS_MATH_PI (double)3.14159265358979323846
+#define JS_MATH_E (double)2.7182818284590452354
+
+static void ret_bad_args(struct mjs* mjs, const char* error) {
+    mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "%s", error);
+    mjs_return(mjs, mjs_mk_undefined());
+}
+
+static bool check_arg_count(struct mjs* mjs, size_t count) {
+    size_t num_args = mjs_nargs(mjs);
+    if(num_args != count) {
+        ret_bad_args(mjs, "Wrong argument count");
+        return false;
+    }
+    return true;
+}
+
+void js_math_abs(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, x < 0 ? mjs_mk_number(mjs, -x) : mjs_arg(mjs, 0));
+}
+
+void js_math_acos(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    if(x < -1 || x > 1) {
+        ret_bad_args(mjs, "Invalid input value for Math.acos");
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, JS_MATH_PI / (double)2 - atan(x / sqrt(1 - x * x))));
+}
+
+void js_math_acosh(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    if(x < 1) {
+        ret_bad_args(mjs, "Invalid input value for Math.acosh");
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, log(x + sqrt(x * x - 1))));
+}
+
+void js_math_asin(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, atan(x / sqrt(1 - x * x))));
+}
+
+void js_math_asinh(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, log(x + sqrt(x * x + 1))));
+}
+
+void js_math_atan(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, atan(x)));
+}
+
+void js_math_atan2(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 2) || !mjs_is_number(mjs_arg(mjs, 0)) ||
+       !mjs_is_number(mjs_arg(mjs, 1))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double y = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 1));
+    mjs_return(mjs, mjs_mk_number(mjs, atan2(y, x)));
+}
+
+void js_math_atanh(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    if(x <= -1 || x >= 1) {
+        ret_bad_args(mjs, "Invalid input value for Math.atanh");
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, (double)0.5 * log((1 + x) / (1 - x))));
+}
+
+void js_math_cbrt(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, pow(x, 1.0 / 3.0)));
+}
+
+void js_math_ceil(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, (int)(x + (double)0.5)));
+}
+
+void js_math_clz32(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    unsigned int x = (unsigned int)mjs_get_int(mjs, mjs_arg(mjs, 0));
+    int count = 0;
+    while(x) {
+        x >>= 1;
+        count++;
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, 32 - count));
+}
+
+void js_math_cos(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, cos(x)));
+}
+
+void js_math_exp(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    double result = 1;
+    double term = 1;
+    for(int i = 1; i < 100; i++) {
+        term *= x / i;
+        result += term;
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, result));
+}
+
+void js_math_floor(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, (int)x));
+}
+
+void js_math_log(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    if(x <= 0) {
+        ret_bad_args(mjs, "Invalid input value for Math.log");
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double result = 0;
+    while(x >= JS_MATH_E) {
+        x /= JS_MATH_E;
+        result++;
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, result + log(x)));
+}
+
+void js_math_max(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 2) || !mjs_is_number(mjs_arg(mjs, 0)) ||
+       !mjs_is_number(mjs_arg(mjs, 1))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    double y = mjs_get_double(mjs, mjs_arg(mjs, 1));
+    mjs_return(mjs, mjs_mk_number(mjs, x > y ? x : y));
+}
+
+void js_math_min(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 2) || !mjs_is_number(mjs_arg(mjs, 0)) ||
+       !mjs_is_number(mjs_arg(mjs, 1))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    double y = mjs_get_double(mjs, mjs_arg(mjs, 1));
+    mjs_return(mjs, mjs_mk_number(mjs, x < y ? x : y));
+}
+
+void js_math_pow(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 2) || !mjs_is_number(mjs_arg(mjs, 0)) ||
+       !mjs_is_number(mjs_arg(mjs, 1))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double base = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    double exponent = mjs_get_double(mjs, mjs_arg(mjs, 1));
+    double result = 1;
+    for(int i = 0; i < exponent; i++) {
+        result *= base;
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, result));
+}
+
+void js_math_random(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 0)) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    const uint32_t random_val = furi_hal_random_get();
+    double rnd = (double)random_val / RAND_MAX;
+    mjs_return(mjs, mjs_mk_number(mjs, rnd));
+}
+
+void js_math_sign(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, x == 0 ? 0 : (x < 0 ? -1 : 1)));
+}
+
+void js_math_sin(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    double result = x;
+    double term = x;
+    for(int i = 1; i < 10; i++) {
+        term *= -x * x / ((2 * i) * (2 * i + 1));
+        result += term;
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, result));
+}
+
+void js_math_sqrt(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    if(x < 0) {
+        ret_bad_args(mjs, "Invalid input value for Math.sqrt");
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double result = 1;
+    while(result * result < x) {
+        result += (double)0.001;
+    }
+    mjs_return(mjs, mjs_mk_number(mjs, result));
+}
+
+void js_math_trunc(struct mjs* mjs) {
+    if(!check_arg_count(mjs, 1) || !mjs_is_number(mjs_arg(mjs, 0))) {
+        mjs_return(mjs, MJS_UNDEFINED);
+    }
+    double x = mjs_get_double(mjs, mjs_arg(mjs, 0));
+    mjs_return(mjs, mjs_mk_number(mjs, x < 0 ? ceil(x) : floor(x)));
+}
+
+static void* js_math_create(struct mjs* mjs, mjs_val_t* object) {
+    mjs_val_t math_obj = mjs_mk_object(mjs);
+    mjs_set(mjs, math_obj, "abs", ~0, MJS_MK_FN(js_math_abs));
+    mjs_set(mjs, math_obj, "acos", ~0, MJS_MK_FN(js_math_acos));
+    mjs_set(mjs, math_obj, "acosh", ~0, MJS_MK_FN(js_math_acosh));
+    mjs_set(mjs, math_obj, "asin", ~0, MJS_MK_FN(js_math_asin));
+    mjs_set(mjs, math_obj, "asinh", ~0, MJS_MK_FN(js_math_asinh));
+    mjs_set(mjs, math_obj, "atan", ~0, MJS_MK_FN(js_math_atan));
+    mjs_set(mjs, math_obj, "atan2", ~0, MJS_MK_FN(js_math_atan2));
+    mjs_set(mjs, math_obj, "atanh", ~0, MJS_MK_FN(js_math_atanh));
+    mjs_set(mjs, math_obj, "cbrt", ~0, MJS_MK_FN(js_math_cbrt));
+    mjs_set(mjs, math_obj, "ceil", ~0, MJS_MK_FN(js_math_ceil));
+    mjs_set(mjs, math_obj, "clz32", ~0, MJS_MK_FN(js_math_clz32));
+    mjs_set(mjs, math_obj, "cos", ~0, MJS_MK_FN(js_math_cos));
+    mjs_set(mjs, math_obj, "exp", ~0, MJS_MK_FN(js_math_exp));
+    mjs_set(mjs, math_obj, "floor", ~0, MJS_MK_FN(js_math_floor));
+    mjs_set(mjs, math_obj, "log", ~0, MJS_MK_FN(js_math_log));
+    mjs_set(mjs, math_obj, "max", ~0, MJS_MK_FN(js_math_max));
+    mjs_set(mjs, math_obj, "min", ~0, MJS_MK_FN(js_math_min));
+    mjs_set(mjs, math_obj, "pow", ~0, MJS_MK_FN(js_math_pow));
+    mjs_set(mjs, math_obj, "random", ~0, MJS_MK_FN(js_math_random));
+    mjs_set(mjs, math_obj, "sign", ~0, MJS_MK_FN(js_math_sign));
+    mjs_set(mjs, math_obj, "sin", ~0, MJS_MK_FN(js_math_sin));
+    mjs_set(mjs, math_obj, "sqrt", ~0, MJS_MK_FN(js_math_sqrt));
+    mjs_set(mjs, math_obj, "trunc", ~0, MJS_MK_FN(js_math_trunc));
+    mjs_set(mjs, math_obj, "PI", ~0, mjs_mk_number(mjs, JS_MATH_PI));
+    mjs_set(mjs, math_obj, "E", ~0, mjs_mk_number(mjs, JS_MATH_E));
+    *object = math_obj;
+    return (void*)1;
+}
+
+static const JsModuleDescriptor js_math_desc = {
+    "math",
+    js_math_create,
+    NULL,
+};
+
+static const FlipperAppPluginDescriptor plugin_descriptor = {
+    .appid = PLUGIN_APP_ID,
+    .ep_api_version = PLUGIN_API_VERSION,
+    .entry_point = &js_math_desc,
+};
+
+const FlipperAppPluginDescriptor* js_math_ep(void) {
+    return &plugin_descriptor;
+}
\ No newline at end of file
diff --git a/applications/system/js_app/modules/js_subghz/js_subghz.c b/applications/system/js_app/modules/js_subghz/js_subghz.c
new file mode 100644
index 000000000..913f8c670
--- /dev/null
+++ b/applications/system/js_app/modules/js_subghz/js_subghz.c
@@ -0,0 +1,391 @@
+#include "../../js_modules.h"
+#include "radio_device_loader.h"
+
+#include <lib/subghz/transmitter.h>
+#include <lib/subghz/devices/devices.h>
+#include <lib/subghz/protocols/protocol_items.h>
+
+#include <flipper_format/flipper_format_i.h>
+
+#define tag "js_subghz"
+
+typedef enum {
+    JsSubghzRadioStateRX,
+    JsSubghzRadioStateTX,
+    JsSubghzRadioStateIDLE,
+} JsSubghzRadioState;
+
+typedef struct {
+    const SubGhzDevice* radio_device;
+    int frequency;
+    bool is_external;
+    JsSubghzRadioState state;
+} JsSubghzInst;
+
+// from subghz cli
+static FuriHalSubGhzPreset js_subghz_get_preset_name(const char* preset_name) {
+    FuriHalSubGhzPreset preset = FuriHalSubGhzPresetIDLE;
+    if(!strcmp(preset_name, "FuriHalSubGhzPresetOok270Async")) {
+        preset = FuriHalSubGhzPresetOok270Async;
+    } else if(!strcmp(preset_name, "FuriHalSubGhzPresetOok650Async")) {
+        preset = FuriHalSubGhzPresetOok650Async;
+    } else if(!strcmp(preset_name, "FuriHalSubGhzPreset2FSKDev238Async")) {
+        preset = FuriHalSubGhzPreset2FSKDev238Async;
+    } else if(!strcmp(preset_name, "FuriHalSubGhzPreset2FSKDev476Async")) {
+        preset = FuriHalSubGhzPreset2FSKDev476Async;
+    } else if(!strcmp(preset_name, "FuriHalSubGhzPresetCustom")) {
+        preset = FuriHalSubGhzPresetCustom;
+    } else {
+        FURI_LOG_I(tag, "unknown preset");
+    }
+    return preset;
+}
+
+static int32_t get_int_arg(struct mjs* mjs, size_t index, int32_t* value) {
+    mjs_val_t int_obj = mjs_arg(mjs, index);
+    if(!mjs_is_number(int_obj)) {
+        mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "Argument must be a number");
+        mjs_return(mjs, MJS_UNDEFINED);
+        return false;
+    }
+    *value = mjs_get_int(mjs, int_obj);
+    return true;
+}
+
+static void js_subghz_set_rx(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    if(js_subghz->state == JsSubghzRadioStateRX) {
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    subghz_devices_set_rx(js_subghz->radio_device);
+    js_subghz->state = JsSubghzRadioStateRX;
+}
+
+static void js_subgjz_set_idle(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    if(js_subghz->state == JsSubghzRadioStateIDLE) {
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    subghz_devices_idle(js_subghz->radio_device);
+    js_subghz->state = JsSubghzRadioStateIDLE;
+}
+
+static void js_subghz_get_rssi(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    if(js_subghz->state != JsSubghzRadioStateRX) {
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    float rssi = subghz_devices_get_rssi(js_subghz->radio_device);
+    mjs_return(mjs, mjs_mk_number(mjs, (double)rssi));
+}
+
+static void js_subghz_get_state(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    const char* state;
+    switch(js_subghz->state) {
+    case JsSubghzRadioStateRX:
+        state = "RX";
+        break;
+    case JsSubghzRadioStateTX:
+        state = "TX";
+        break;
+    case JsSubghzRadioStateIDLE:
+        state = "IDLE";
+        break;
+    default:
+        state = "";
+        break;
+    }
+
+    mjs_return(mjs, mjs_mk_string(mjs, state, ~0, true));
+}
+
+static void js_subghz_is_external(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    mjs_return(mjs, mjs_mk_boolean(mjs, js_subghz->is_external));
+}
+
+static void js_subghz_set_frequency(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    if(js_subghz->state != JsSubghzRadioStateIDLE) {
+        mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Radio is not in IDLE state");
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    int32_t frequency;
+    if(!get_int_arg(mjs, 0, &frequency)) return;
+
+    if(!subghz_devices_is_frequency_valid(js_subghz->radio_device, frequency)) {
+        mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Invalid frequency");
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    js_subghz->frequency = subghz_devices_set_frequency(js_subghz->radio_device, frequency);
+
+    mjs_return(mjs, mjs_mk_number(mjs, (double)js_subghz->frequency));
+}
+
+static void js_subghz_get_frequency(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    mjs_return(mjs, mjs_mk_number(mjs, (double)js_subghz->frequency));
+}
+
+static void js_subghz_transmit_file(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    mjs_val_t file = mjs_arg(mjs, 0);
+
+    if(!mjs_is_string(file)) {
+        mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "File must be a string");
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    const char* file_path = mjs_get_string(mjs, &file, NULL);
+    if(!file_path) {
+        mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Failed to get file path");
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    Storage* storage = furi_record_open(RECORD_STORAGE);
+    FlipperFormat* fff_file = flipper_format_file_alloc(storage);
+    FlipperFormat* fff_data_raw = flipper_format_string_alloc();
+
+    if(!flipper_format_file_open_existing(fff_file, file_path)) {
+        flipper_format_free(fff_file);
+        furi_record_close(RECORD_STORAGE);
+        mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Failed to open file");
+        mjs_return(mjs, MJS_UNDEFINED);
+        return;
+    }
+
+    SubGhzEnvironment* environment = subghz_environment_alloc();
+    if(!subghz_environment_load_keystore(environment, SUBGHZ_KEYSTORE_DIR_NAME)) {
+        FURI_LOG_I(tag, "Load_keystore keeloq_mfcodes \033[0;31mERROR\033[0m\r\n");
+    }
+    if(!subghz_environment_load_keystore(environment, SUBGHZ_KEYSTORE_DIR_USER_NAME)) {
+        FURI_LOG_I(tag, "Load_keystore keeloq_mfcodes_user \033[0;33mAbsent\033[0m\r\n");
+    }
+    subghz_environment_set_alutech_at_4n_rainbow_table_file_name(
+        environment, SUBGHZ_ALUTECH_AT_4N_DIR_NAME);
+    subghz_environment_set_nice_flor_s_rainbow_table_file_name(
+        environment, SUBGHZ_NICE_FLOR_S_DIR_NAME);
+    subghz_environment_set_protocol_registry(environment, (void*)&subghz_protocol_registry);
+
+    FuriString* temp_str = furi_string_alloc();
+    SubGhzTransmitter* transmitter = NULL;
+    bool is_init_protocol = true;
+    bool is_sent = false;
+    uint32_t frequency = 0;
+    uint32_t repeat = 10;
+
+    do {
+        //Load frequency
+        if(!flipper_format_read_uint32(fff_file, "Frequency", &frequency, 1)) {
+            mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Failed to read frequency from file");
+            mjs_return(mjs, MJS_UNDEFINED);
+            break;
+        }
+
+        if(!subghz_devices_is_frequency_valid(js_subghz->radio_device, frequency)) {
+            mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Invalid frequency");
+            mjs_return(mjs, MJS_UNDEFINED);
+            break;
+        }
+
+        if(!flipper_format_read_string(fff_file, "Preset", temp_str)) {
+            mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Failed to read preset from file");
+            mjs_return(mjs, MJS_UNDEFINED);
+            break;
+        }
+
+        subghz_devices_reset(js_subghz->radio_device);
+
+        if(!strcmp(furi_string_get_cstr(temp_str), "FuriHalSubGhzPresetCustom")) {
+            mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Custom presets are not supported (yet)");
+            mjs_return(mjs, MJS_UNDEFINED);
+            break;
+        } else {
+            subghz_devices_load_preset(
+                js_subghz->radio_device,
+                js_subghz_get_preset_name(furi_string_get_cstr(temp_str)),
+                NULL);
+        }
+
+        js_subghz->frequency = subghz_devices_set_frequency(js_subghz->radio_device, frequency);
+
+        if(!flipper_format_read_string(fff_file, "Protocol", temp_str)) {
+            mjs_prepend_errorf(mjs, MJS_INTERNAL_ERROR, "Failed to read protocol from file");
+            mjs_return(mjs, MJS_UNDEFINED);
+            break;
+        }
+
+        SubGhzProtocolStatus status;
+        bool is_raw = false;
+
+        if(!strcmp(furi_string_get_cstr(temp_str), "RAW")) {
+            subghz_protocol_raw_gen_fff_data(
+                fff_data_raw, file_path, subghz_devices_get_name(js_subghz->radio_device));
+            is_raw = true;
+        }
+
+        transmitter = subghz_transmitter_alloc_init(environment, furi_string_get_cstr(temp_str));
+        if(transmitter == NULL) {
+            is_init_protocol = false;
+        }
+
+        if(is_init_protocol) {
+            status = subghz_transmitter_deserialize(transmitter, is_raw ? fff_data_raw : fff_file);
+            if(status != SubGhzProtocolStatusOk) {
+                FURI_LOG_I(tag, "failed to deserialize transmitter");
+                is_init_protocol = false;
+            }
+        } else {
+            FURI_LOG_I(tag, "failed to allocate transmitter");
+            subghz_devices_idle(js_subghz->radio_device);
+            js_subghz->state = JsSubghzRadioStateIDLE;
+        }
+    } while(false);
+
+    if(is_init_protocol) {
+        if(!js_subghz->is_external) {
+            furi_hal_power_suppress_charge_enter();
+        }
+
+        FURI_LOG_I(tag, "transmitting file %s", file_path);
+
+        do {
+            furi_delay_ms(200);
+            if(subghz_devices_start_async_tx(
+                   js_subghz->radio_device, subghz_transmitter_yield, transmitter)) {
+                while(!subghz_devices_is_async_complete_tx(js_subghz->radio_device)) {
+                    furi_delay_ms(333);
+                }
+                subghz_devices_stop_async_tx(js_subghz->radio_device);
+                is_sent = true;
+            } else {
+                FURI_LOG_E(tag, "failed to start async tx");
+            }
+
+        } while(repeat && !strcmp(furi_string_get_cstr(temp_str), "RAW"));
+
+        subghz_devices_idle(js_subghz->radio_device);
+        js_subghz->state = JsSubghzRadioStateIDLE;
+
+        if(!js_subghz->is_external) {
+            furi_hal_power_suppress_charge_exit();
+        }
+    }
+
+    furi_string_free(temp_str);
+    flipper_format_free(fff_file);
+    flipper_format_free(fff_data_raw);
+    furi_record_close(RECORD_STORAGE);
+
+    subghz_environment_reset_keeloq(environment);
+    subghz_environment_free(environment);
+    subghz_transmitter_free(transmitter);
+
+    mjs_return(mjs, mjs_mk_boolean(mjs, is_sent));
+}
+
+static void js_subghz_setup(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubghzInst* js_subghz = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(js_subghz);
+
+    js_subghz->radio_device =
+        radio_device_loader_set(js_subghz->radio_device, SubGhzRadioDeviceTypeExternalCC1101);
+
+    if(!subghz_devices_is_connect(js_subghz->radio_device)) {
+        js_subghz->is_external = true;
+    } else {
+        js_subghz->is_external = false;
+    }
+
+    js_subghz->state = JsSubghzRadioStateIDLE;
+    js_subghz->frequency = 433920000;
+
+    subghz_devices_reset(js_subghz->radio_device);
+    subghz_devices_idle(js_subghz->radio_device);
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void* js_subghz_create(struct mjs* mjs, mjs_val_t* object) {
+    JsSubghzInst* js_subghz = malloc(sizeof(JsSubghzInst));
+    mjs_val_t subghz_obj = mjs_mk_object(mjs);
+
+    subghz_devices_init();
+
+    mjs_set(mjs, subghz_obj, INST_PROP_NAME, ~0, mjs_mk_foreign(mjs, js_subghz));
+    mjs_set(mjs, subghz_obj, "setup", ~0, MJS_MK_FN(js_subghz_setup));
+    mjs_set(mjs, subghz_obj, "setRx", ~0, MJS_MK_FN(js_subghz_set_rx));
+    mjs_set(mjs, subghz_obj, "setIdle", ~0, MJS_MK_FN(js_subgjz_set_idle));
+    mjs_set(mjs, subghz_obj, "getRssi", ~0, MJS_MK_FN(js_subghz_get_rssi));
+    mjs_set(mjs, subghz_obj, "getState", ~0, MJS_MK_FN(js_subghz_get_state));
+    mjs_set(mjs, subghz_obj, "getFrequency", ~0, MJS_MK_FN(js_subghz_get_frequency));
+    mjs_set(mjs, subghz_obj, "setFrequency", ~0, MJS_MK_FN(js_subghz_set_frequency));
+    mjs_set(mjs, subghz_obj, "isExternal", ~0, MJS_MK_FN(js_subghz_is_external));
+    mjs_set(mjs, subghz_obj, "transmitFile", ~0, MJS_MK_FN(js_subghz_transmit_file));
+
+    *object = subghz_obj;
+
+    return js_subghz;
+}
+
+static void js_subghz_destroy(void* inst) {
+    JsSubghzInst* js_subghz = inst;
+
+    subghz_devices_deinit();
+
+    free(js_subghz);
+}
+
+static const JsModuleDescriptor js_subghz_desc = {
+    "subghz",
+    js_subghz_create,
+    js_subghz_destroy,
+};
+
+static const FlipperAppPluginDescriptor plugin_descriptor = {
+    .appid = PLUGIN_APP_ID,
+    .ep_api_version = PLUGIN_API_VERSION,
+    .entry_point = &js_subghz_desc,
+};
+
+const FlipperAppPluginDescriptor* js_subghz_ep(void) {
+    return &plugin_descriptor;
+}
diff --git a/applications/system/js_app/modules/js_subghz/radio_device_loader.c b/applications/system/js_app/modules/js_subghz/radio_device_loader.c
new file mode 100644
index 000000000..d2cffde58
--- /dev/null
+++ b/applications/system/js_app/modules/js_subghz/radio_device_loader.c
@@ -0,0 +1,64 @@
+#include "radio_device_loader.h"
+
+#include <applications/drivers/subghz/cc1101_ext/cc1101_ext_interconnect.h>
+#include <lib/subghz/devices/cc1101_int/cc1101_int_interconnect.h>
+
+static void radio_device_loader_power_on() {
+    uint8_t attempts = 0;
+    while(!furi_hal_power_is_otg_enabled() && attempts++ < 5) {
+        furi_hal_power_enable_otg();
+        //CC1101 power-up time
+        furi_delay_ms(10);
+    }
+}
+
+static void radio_device_loader_power_off() {
+    if(furi_hal_power_is_otg_enabled()) furi_hal_power_disable_otg();
+}
+
+bool radio_device_loader_is_connect_external(const char* name) {
+    bool is_connect = false;
+    bool is_otg_enabled = furi_hal_power_is_otg_enabled();
+
+    if(!is_otg_enabled) {
+        radio_device_loader_power_on();
+    }
+
+    const SubGhzDevice* device = subghz_devices_get_by_name(name);
+    if(device) {
+        is_connect = subghz_devices_is_connect(device);
+    }
+
+    if(!is_otg_enabled) {
+        radio_device_loader_power_off();
+    }
+    return is_connect;
+}
+
+const SubGhzDevice* radio_device_loader_set(
+    const SubGhzDevice* current_radio_device,
+    SubGhzRadioDeviceType radio_device_type) {
+    const SubGhzDevice* radio_device;
+
+    if(radio_device_type == SubGhzRadioDeviceTypeExternalCC1101 &&
+       radio_device_loader_is_connect_external(SUBGHZ_DEVICE_CC1101_EXT_NAME)) {
+        radio_device_loader_power_on();
+        radio_device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_EXT_NAME);
+        subghz_devices_begin(radio_device);
+    } else if(current_radio_device == NULL) {
+        radio_device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME);
+    } else {
+        radio_device_loader_end(current_radio_device);
+        radio_device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME);
+    }
+
+    return radio_device;
+}
+
+void radio_device_loader_end(const SubGhzDevice* radio_device) {
+    furi_assert(radio_device);
+    radio_device_loader_power_off();
+    if(radio_device != subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME)) {
+        subghz_devices_end(radio_device);
+    }
+}
\ No newline at end of file
diff --git a/applications/system/js_app/modules/js_subghz/radio_device_loader.h b/applications/system/js_app/modules/js_subghz/radio_device_loader.h
new file mode 100644
index 000000000..bee4e2c36
--- /dev/null
+++ b/applications/system/js_app/modules/js_subghz/radio_device_loader.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <lib/subghz/devices/devices.h>
+
+/** SubGhzRadioDeviceType */
+typedef enum {
+    SubGhzRadioDeviceTypeInternal,
+    SubGhzRadioDeviceTypeExternalCC1101,
+} SubGhzRadioDeviceType;
+
+const SubGhzDevice* radio_device_loader_set(
+    const SubGhzDevice* current_radio_device,
+    SubGhzRadioDeviceType radio_device_type);
+
+void radio_device_loader_end(const SubGhzDevice* radio_device);
\ No newline at end of file
diff --git a/applications/system/js_app/modules/js_submenu.c b/applications/system/js_app/modules/js_submenu.c
new file mode 100644
index 000000000..b87f34fa8
--- /dev/null
+++ b/applications/system/js_app/modules/js_submenu.c
@@ -0,0 +1,152 @@
+#include <gui/modules/submenu.h>
+#include <gui/view_dispatcher.h>
+#include <gui/view.h>
+#include "../js_modules.h"
+
+typedef struct {
+    Submenu* submenu;
+    ViewDispatcher* view_dispatcher;
+    uint32_t result;
+} JsSubmenuInst;
+
+typedef enum {
+    JsSubmenuViewSubmenu,
+} JsSubmenuView;
+
+static JsSubmenuInst* get_this_ctx(struct mjs* mjs) {
+    mjs_val_t obj_inst = mjs_get(mjs, mjs_get_this(mjs), INST_PROP_NAME, ~0);
+    JsSubmenuInst* storage = mjs_get_ptr(mjs, obj_inst);
+    furi_assert(storage);
+    return storage;
+}
+
+static void ret_bad_args(struct mjs* mjs, const char* error) {
+    mjs_prepend_errorf(mjs, MJS_BAD_ARGS_ERROR, "%s", error);
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static bool check_arg_count(struct mjs* mjs, size_t count) {
+    size_t num_args = mjs_nargs(mjs);
+    if(num_args != count) {
+        ret_bad_args(mjs, "Wrong argument count");
+        return false;
+    }
+    return true;
+}
+
+static bool get_str_arg(struct mjs* mjs, size_t index, const char** value) {
+    mjs_val_t str_obj = mjs_arg(mjs, index);
+    if(!mjs_is_string(str_obj)) {
+        ret_bad_args(mjs, "Argument must be a string");
+        return false;
+    }
+    size_t str_len = 0;
+    *value = mjs_get_string(mjs, &str_obj, &str_len);
+    if((str_len == 0) || (*value == NULL)) {
+        ret_bad_args(mjs, "Bad string argument");
+        return false;
+    }
+    return true;
+}
+
+static int32_t get_int_arg(struct mjs* mjs, size_t index, int32_t* value) {
+    mjs_val_t int_obj = mjs_arg(mjs, index);
+    if(!mjs_is_number(int_obj)) {
+        ret_bad_args(mjs, "Argument must be a number");
+        return false;
+    }
+    *value = mjs_get_int32(mjs, int_obj);
+    return true;
+}
+
+static void submenu_callback(void* context, uint32_t id) {
+    UNUSED(id);
+    JsSubmenuInst* submenu = context;
+    submenu->result = id;
+    view_dispatcher_stop(submenu->view_dispatcher);
+}
+
+static void js_submenu_add_item(struct mjs* mjs) {
+    JsSubmenuInst* submenu = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 2)) return;
+
+    const char* label;
+    if(!get_str_arg(mjs, 0, &label)) return;
+
+    int32_t id;
+    if(!get_int_arg(mjs, 1, &id)) return;
+
+    submenu_add_item(submenu->submenu, label, id, submenu_callback, submenu);
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_submenu_set_header(struct mjs* mjs) {
+    JsSubmenuInst* submenu = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 1)) return;
+
+    const char* header;
+    if(!get_str_arg(mjs, 0, &header)) return;
+
+    submenu_set_header(submenu->submenu, header);
+
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
+static void js_submenu_show(struct mjs* mjs) {
+    JsSubmenuInst* submenu = get_this_ctx(mjs);
+    if(!check_arg_count(mjs, 0)) return;
+    submenu->result = 0;
+
+    view_dispatcher_attach_to_gui(
+        submenu->view_dispatcher, furi_record_open(RECORD_GUI), ViewDispatcherTypeFullscreen);
+    furi_record_close(RECORD_GUI);
+
+    view_dispatcher_switch_to_view(submenu->view_dispatcher, JsSubmenuViewSubmenu);
+
+    view_dispatcher_run(submenu->view_dispatcher);
+
+    submenu_reset(submenu->submenu);
+
+    mjs_return(mjs, mjs_mk_number(mjs, submenu->result));
+}
+
+static void* js_submenu_create(struct mjs* mjs, mjs_val_t* object) {
+    JsSubmenuInst* submenu = malloc(sizeof(JsSubmenuInst));
+    mjs_val_t submenu_obj = mjs_mk_object(mjs);
+    mjs_set(mjs, submenu_obj, INST_PROP_NAME, ~0, mjs_mk_foreign(mjs, submenu));
+    mjs_set(mjs, submenu_obj, "addItem", ~0, MJS_MK_FN(js_submenu_add_item));
+    mjs_set(mjs, submenu_obj, "setHeader", ~0, MJS_MK_FN(js_submenu_set_header));
+    mjs_set(mjs, submenu_obj, "show", ~0, MJS_MK_FN(js_submenu_show));
+    submenu->submenu = submenu_alloc();
+    submenu->view_dispatcher = view_dispatcher_alloc();
+    view_dispatcher_enable_queue(submenu->view_dispatcher);
+    view_dispatcher_add_view(
+        submenu->view_dispatcher, JsSubmenuViewSubmenu, submenu_get_view(submenu->submenu));
+    *object = submenu_obj;
+    return submenu;
+}
+
+static void js_submenu_destroy(void* inst) {
+    JsSubmenuInst* submenu = inst;
+    view_dispatcher_remove_view(submenu->view_dispatcher, JsSubmenuViewSubmenu);
+    submenu_free(submenu->submenu);
+    view_dispatcher_free(submenu->view_dispatcher);
+    free(submenu);
+}
+
+static const JsModuleDescriptor js_submenu_desc = {
+    "submenu",
+    js_submenu_create,
+    js_submenu_destroy,
+};
+
+static const FlipperAppPluginDescriptor submenu_plugin_descriptor = {
+    .appid = PLUGIN_APP_ID,
+    .ep_api_version = PLUGIN_API_VERSION,
+    .entry_point = &js_submenu_desc,
+};
+
+const FlipperAppPluginDescriptor* js_submenu_ep(void) {
+    return &submenu_plugin_descriptor;
+}
\ No newline at end of file
diff --git a/targets/f7/api_symbols.csv b/targets/f7/api_symbols.csv
index 03c12a66b..85f25d00e 100644
--- a/targets/f7/api_symbols.csv
+++ b/targets/f7/api_symbols.csv
@@ -991,6 +991,7 @@ Function,-,exp2f,float,float
 Function,-,exp2l,long double,long double
 Function,+,expansion_disable,void,Expansion*
 Function,+,expansion_enable,void,Expansion*
+Function,+,expansion_is_connected,_Bool,Expansion*
 Function,+,expansion_set_listen_serial,void,"Expansion*, FuriHalSerialId"
 Function,-,expf,float,float
 Function,-,expl,long double,long double