iOS CoreBluetooth 开发

// Info.plist
<key>NSBluetoothAlwaysUsageDescription</key>
<string>需要使用蓝牙连接设备</string>
<key>NSBluetoothPeripheralUsageDescription</key>
<string>需要连接蓝牙外设</string>

// Swift - 扫描设备
import CoreBluetooth

class BLEManager: NSObject, CBCentralManagerDelegate {
    var centralManager: CBCentralManager!
    
    func scan() {
        centralManager = CBCentralManager(delegate: self, queue: nil)
    }
    
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        if central.state == .poweredOn {
            centralManager.scanForPeripherals(withServices: nil)
        }
    }
}

Linux BlueZ 开发

# 安装 BlueZ
sudo apt-get install bluez bluez-tools

# 蓝牙控制命令
bluetoothctl  # 进入交互模式
scan on       # 扫描设备
pair XX:XX:XX:XX:XX:XX  # 配对
connect XX:XX:XX:XX:XX:XX  # 连接

# Python - bleak 库
import asyncio
from bleak import BleakScanner

async def scan():
    devices = await BleakScanner.discover()
    for d in devices:
        print(f"{d.name}: {d.address}")

asyncio.run(scan())

嵌入式 Nordic nRF52 开发

// main.c - BLE 初始化
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"

void ble_stack_init(void) {
    ret_code_t err_code;
    
    // 启用 SoftDevice
    nrf_clock_lf_cfg_t clock_cfg = NRF_CLOCK_LFCLK_RC;
    SOFTDEVICE_HANDLER_INIT(&clock_cfg, NULL);
    
    // 启用 BLE
    ble_enable_params_t ble_enable_params;
    ble_cfg_t ble_cfg;
    
    // 配置 GAP
    ble_cfg.conn_cfg.conn_cfg_tag = 1;
    ble_cfg.conn_cfg.params.gap_conn_cfg.min_conn_interval = 7.5;
    ble_cfg.conn_cfg.params.gap_conn_cfg.max_conn_interval = 15;
    
    sd_ble_cfg_set(BLE_CONN_CFG_GAP, &ble_cfg, RAM_START);
    sd_ble_enable(&ram_start);
}