Setting to turn Bluetooth on and off

apps/settings-default.json

@@ -1,4 +1,5 @@
 {
+  ble: false,          // Bluetooth disabled by default
   timeout: 10,         // Default LCD timeout in seconds
   vibrate: true,       // Vibration enabled by default. App must support
   beep: true,          // Beep enabled by default. App must support

apps/settings-init.js

@@ -1,5 +1,6 @@
 (function() {
   var s = require('Storage').readJSON('@setting');
+  if (s.ble) {
     var adv = { uart: true };
     if (s.HID) {
       // Report from https://notes.iopush.net/custom-usb-hid-device-descriptor-media-keyboard/
@@ -75,6 +76,12 @@
       adv.hid = Bangle.HID;
     }
     NRF.setServices(undefined, adv);
+    try {
+      NRF.wake();
+    } catch (e) {}
+  } else {
+    NRF.sleep();
+  }
 
   if (!s.vibrate) Bangle.buzz=()=>Promise.resolve();
   if (!s.beep) Bangle.beep=()=>Promise.resolve();

apps/settings.js

@@ -18,6 +18,7 @@ function updateSettings() {
 
 function resetSettings() {
   settings = {
+    ble: false,
     timeout: 10,
     vibrate: true,
     beep: true,
@@ -39,6 +40,14 @@ const boolFormat = (v) => v ? "On" : "Off";
 function showMainMenu() {
   const mainmenu = {
     '': { 'title': 'Settings' },
+    'BLE': {
+      value: settings.ble,
+      format: boolFormat,
+      onchange: () => {
+        settings.ble = !settings.ble;
+        updateSettings();
+      }
+    },
     'LCD Timeout': {
       value: settings.timeout,
       min: 0,