First commit DSDRelay

apps.json

@@ -2251,5 +2251,18 @@
     {"name":"digiclock.app.js","url":"digiclock.js"},
     {"name":"digiclock.img","url":"digiclock-icon.js","evaluate":true}
  ]
+},
+  { "id": "dsdrelay",
+    "name": "DSD BLE Relay controller",
+    "shortName":"DSDRelay",
+    "icon": "icons8-relay-48.png",
+    "version":"0.01",
+    "description": "Control BLE relay board from the watch",
+    "tags": "ble,bluetooth",
+    "readme": "README.md",
+    "storage": [
+      {"name":"dsdrelay.app.js","url":"dsdrelay.app.js"},
+      {"name":"dsdrelay.img","url":"dsdrelay-icon.js","evaluate":true}
+    ]
   }
 ]

apps/dsdrelay/ChangeLog

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+0.01: New app!

apps/dsdrelay/README.md

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+# DSDRelay
+
+Small app to control DSD Tech BLE relay boards from the watch. I have seen them being sold as 1-, 2- and 4-relay boards. The app shows controls for
+4 relays, regardless of the actual configuration of the board connected.
+
+![](dsdrelay-pic.jpg)
+
+## Controls
+- buttons 1 and 3 cycle the selection of the currently active channel
+- swipe right turns the selected channel's relay *on*
+- swipe left turns the selected channel's relay *off*
+
+I only own a 1-relay board, so only the "Ch 1" functionality was tested; the other channels were implemented per the manufacturer's documentation.
+In particular, the method for determining the relay states on app startup for channels 2-4 was mostly an educated guess.

apps/dsdrelay/dsdrelay-icon.js

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+require("heatshrink").decompress(atob("mEwwhC/AH4A/AAcK1QAO0AXFCx4ABFyowGC/4X/C/4X/C48AC6IWEGCIuFAAUN6AED7vdAwgEDC/4X/C/4X86AGGC85fpAH4A/AH4ASA"))

apps/dsdrelay/dsdrelay.app.js

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+var device;
+var gatt;
+var service;
+var characteristic;
+
+// on/off commands
+// Channel 1 ON:  A00101A2 
+// Channel 1 OFF: A00100A1
+// Channel 2 ON:  A00201A3
+// Channel 2 OFF: A00200A2
+// Channel 3 ON:  A00301A4
+// Channel 3 OFF: A00300A3
+// Channel 4 ON:  A00401A5
+// Channel 4 OFF: A00400A4
+
+var cmds = [{ on:  new Uint8Array([0xa0, 0x01, 0x01, 0xa2]),
+              off: new Uint8Array([0xa0, 0x01, 0x00, 0xa1]) },
+            { on:  new Uint8Array([0xa0, 0x02, 0x01, 0xa3]),
+              off: new Uint8Array([0xa0, 0x02, 0x00, 0xa2]) },
+            { on:  new Uint8Array([0xa0, 0x03, 0x01, 0xa4]),
+              off: new Uint8Array([0xa0, 0x03, 0x00, 0xa3]) },
+            { on:  new Uint8Array([0xa0, 0x04, 0x01, 0xa5]),
+              off: new Uint8Array([0xa0, 0x04, 0x00, 0xa4]) }];
+
+const button_w = 100;
+const button_h = 36;
+const button_r = button_h/2-4;
+const button_sp = 46;
+
+var n_channels = 4;
+var channel = 0;
+var channel_state = [];
+
+function drawButton(x, y, state) {
+  if (state) g.setColor(0.2, 0.2, 0.95);
+  else g.setColor(0.5, 0.5, 0.5);
+  g.fillCircle(x+button_h/2, y+button_h/2, button_h/2).
+    fillRect(x+button_h/2, y, x+button_w-button_h/2, y+button_h).
+    fillCircle(x+button_w-button_h/2, y+button_h/2, button_h/2);
+  g.setColor(0.85, 0.85, 0.85);
+  if (state) 
+    g.fillCircle(x+button_w-button_h/2, y+button_h/2, button_r);
+  else
+    g.fillCircle(x+button_h/2, y+button_h/2, button_r);
+  g.flip();
+}
+
+function setup_screen() {
+  g.clearRect(0, 60, g.getWidth()-1, g.getHeight()-1);
+  for (var i=0; i<4; ++i) {
+    g.setFontVector(22).setFontAlign(-1, 0, 0).setColor(0xffff).drawString("Ch"+String(i+1), 16, 60+i*button_sp+button_h/2);
+    drawButton((g.getWidth()-button_w)/2, 60+i*button_sp, channel_state[i]);
+  }
+  moveChannelFrame(channel, channel);
+}
+
+function parseDevice(d) {
+  device = d;
+  g.clearRect(0, 60, 239, 239).setFontAlign(0, 0, 0).setColor(0, 1, 0).drawString("Found device", 120, 120).flip();
+  device.gatt.connect().then(function(ga) {
+  gatt = ga;
+  g.clearRect(0, 60, 239, 239).setFontAlign(0, 0, 0).setColor(0, 1, 0).drawString("Connected", 120, 120).flip();
+  return gatt.getPrimaryService("FFE0");
+}).then(function(s) {
+  service = s;
+  return service.getCharacteristic("FFE1");
+}).then(function(c) {
+  characteristic = c;
+  console.log(c);
+  return;
+}).then(function() {
+  console.log("Done!");
+  g.clearRect(0, 60, 239, 239).setColor(1, 1, 1).flip();
+  setup_app();
+}).catch(function(e) {
+  g.clearRect(0, 60, 239, 239).setColor(1, 0, 0).setFontAlign(0, 0, 0).drawString("ERROR"+e, 120, 120).flip();
+  console.log(e);
+})}
+
+function connection_setup() {
+  NRF.setScan();
+  NRF.setScan(parseDevice, { filters: [{services:["FFE0"]}], timeout: 2000});
+  g.clearRect(0, 60, 239, 239).setFontVector(18).setFontAlign(0, 0, 0).setColor(0, 1, 0);
+  g.drawString("Scanning for relay...", 120, 120);
+}
+
+function moveChannelFrame(oldc, newc) {
+  g.setColor(0).drawRect(8, 60+oldc*button_sp-4, g.getWidth()-8, 60+oldc*button_sp+button_h+4);
+  g.setColor(0.9, 0.9, 0.9).drawRect(8, 60+newc*button_sp-4, g.getWidth()-8, 60+newc*button_sp+button_h+4);
+}
+
+function setup_app() {
+  characteristic.readValue().then(function(r) {
+    for (var i=0; i<r.buffer.length/4; ++i) channel_state.push(r.buffer[i*4+2]==1);
+  }).then(setup_screen);
+    
+  Bangle.on('swipe', function(direction){
+      switch(direction){
+        case 1:
+          drawButton((g.getWidth()-button_w)/2, 60+channel*button_sp, true);
+          characteristic.writeValue(cmds[channel].on);
+          break;
+        case -1:
+          drawButton((g.getWidth()-button_w)/2, 60+channel*button_sp, false);
+          characteristic.writeValue(cmds[channel].off);
+          break;
+  }});
+  setWatch(function() { var nc = channel-1; if (nc<0) nc = n_channels-1; moveChannelFrame(channel, nc); channel = nc; }, BTN1, {repeat:true, debounce:30});
+  setWatch(function() { moveChannelFrame(channel, (channel+1)%n_channels); channel = (channel+1)%n_channels; }, BTN3, {repeat:true, debounce:30});
+}
+
+
+connection_setup();
+
+Bangle.loadWidgets();
+Bangle.drawWidgets();

apps/dsdrelay/dsdrelay.info

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+{"id":"dsdrelay","name":"DSD Relay","src":"dsdrelay.app.js","icon":"dsdrelay.img"}