Firmware & Software DesignФърмуер и софтуерен дизайн

void UART_Init(uint32_t baud) {
    RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
    GPIOA->MODER |= GPIO_MODER_MODE2_1;

    USART2->BRR = SystemCoreClock / baud;
    USART2->CR1 = USART_CR1_TE | USART_CR1_RE;
    USART2->CR1 |= USART_CR1_UE;

    // Enable RX interrupt
    USART2->CR1 |= USART_CR1_RXNEIE;
    NVIC_EnableIRQ(USART2_IRQn);
}

async def on_sensor_data(client, topic, payload):
    data = json.loads(payload)
    temperature = data["temp"]
    humidity = data["humidity"]

    await db.insert("readings", {
        "timestamp": datetime.utcnow(),
        "sensor_id": client.id,
        "values": {temperature, humidity}
    })

public class DeviceManager {
    private final BluetoothAdapter adapter;

    public void scanForDevices(ScanCallback cb) {
        BluetoothLeScanner scanner =
            adapter.getBluetoothLeScanner();
        ScanSettings settings = new ScanSettings
            .Builder()
            .setScanMode(SCAN_MODE_LOW_LATENCY)
            .build();
        scanner.startScan(null, settings, cb);
    }
}