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 wifiConfigChar = await service.getCharacteristic(
  "522b443a-4f53-534d-1020-420badbabe69"
);
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"));

// Configure WiFi
await wifiConfigChar.writeValue(new TextEncoder().encode("set:wifi:MyNetwork|MyPassword123"));

// Check WiFi status
const wifiStatus = await wifiConfigChar.readValue();
console.log("WiFi:", JSON.parse(new TextDecoder().decode(wifiStatus)));

// 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);

import asyncio
import json
from bleak import BleakClient

SERVICE_UUID = "522b443a-4f53-534d-0001-420badbabe69"
COMMAND_UUID = "522b443a-4f53-534d-1000-420badbabe69"
STATE_UUID = "522b443a-4f53-534d-2000-420badbabe69"
SPEED_KNOB_UUID = "522b443a-4f53-534d-1010-420badbabe69"
WIFI_CONFIG_UUID = "522b443a-4f53-534d-1020-420badbabe69"

def state_callback(sender, data):
    """Handle state update notifications."""
    state = json.loads(data.decode())
    print(f"State update: {state}")

async def connect_to_ossm():
    async with BleakClient("OSSM") as client:
        # Subscribe to state updates
        await client.start_notify(STATE_UUID, state_callback)

        # Configure speed knob behavior
        await client.write_gatt_char(
            SPEED_KNOB_UUID,
            "true".encode()  # Knob acts as upper limit
        )

        # Configure WiFi
        await client.write_gatt_char(
            WIFI_CONFIG_UUID,
            "set:wifi:MyNetwork|MyPassword123".encode()
        )

        # Check WiFi status
        wifi_status = await client.read_gatt_char(WIFI_CONFIG_UUID)
        print(f"WiFi status: {json.loads(wifi_status.decode())}")

        # Send a command
        command = "set:speed:75"
        await client.write_gatt_char(COMMAND_UUID, command.encode())

        # Keep connection alive to receive notifications
        await asyncio.sleep(10)

asyncio.run(connect_to_ossm())