BLE Protocol

// Connect to OSSM
const device = await navigator.bluetooth.requestDevice({
  filters: [{ name: "OSSM" }],
  optionalServices: ["522b443a-4f53-534d-0001-420badbabe69"],
});

const server = await device.gatt.connect();
const service = await server.getPrimaryService(
  "522b443a-4f53-534d-0001-420badbabe69"
);

// Get characteristics
const commandChar = await service.getCharacteristic(
  "522b443a-4f53-534d-1000-420badbabe69"
);
const stateChar = await service.getCharacteristic(
  "522b443a-4f53-534d-2000-420badbabe69"
);
const speedKnobConfigChar = await service.getCharacteristic(
  "522b443a-4f53-534d-1010-420badbabe69"
);
const patternsChar = await service.getCharacteristic(
  "522b443a-4f53-534d-3000-420badbabe69"
);

// Subscribe to state updates
await stateChar.startNotifications();
stateChar.addEventListener("characteristicvaluechanged", (event) => {
  const state = JSON.parse(new TextDecoder().decode(event.target.value));
  console.log("State update:", state);
});

// Configure speed knob behavior (true = knob as limit, false = independent)
await speedKnobConfigChar.writeValue(new TextEncoder().encode("true"));

// Send a command
const command = "set:speed:75";
await commandChar.writeValue(new TextEncoder().encode(command));

// Read available patterns
const patterns = await patternsChar.readValue();
const patternList = JSON.parse(new TextDecoder().decode(patterns));
console.log("Available patterns:", patternList);