GPIO Control

// Connect to OSSM (assumes already connected to service)
const gpioChar = await service.getCharacteristic(
  "522b443a-4f53-534d-4000-420badbabe69"
);

// Set pin 1 HIGH
await gpioChar.writeValue(new TextEncoder().encode("1:high"));

// Read the response
const response = await gpioChar.readValue();
console.log(new TextDecoder().decode(response));
// Output: "ok:1:high"

// Set pin 2 LOW
await gpioChar.writeValue(new TextEncoder().encode("2:low"));

// Read capabilities
const caps = await gpioChar.readValue();
console.log(new TextDecoder().decode(caps));
// Output: "pins:[1,2,3,4]"

import asyncio
from bleak import BleakClient

GPIO_UUID = "522b443a-4f53-534d-4000-420badbabe69"

async def control_gpio():
    async with BleakClient("OSSM") as client:
        # Set pin 1 HIGH
        await client.write_gatt_char(GPIO_UUID, b"1:high")
        
        # Read response
        response = await client.read_gatt_char(GPIO_UUID)
        print(response.decode())  # "ok:1:high"
        
        # Set pin 2 LOW
        await client.write_gatt_char(GPIO_UUID, b"2:low")
        
        # Set multiple pins
        await client.write_gatt_char(GPIO_UUID, b"3:high")
        await client.write_gatt_char(GPIO_UUID, b"4:low")

asyncio.run(control_gpio())