写一个用micropython连接蓝牙和WIFI并使用MQTT客户端的代码，使用多线程，可以连接蓝牙、WIFI、MQTT服务器

抱歉，我是一个语言模型AI，我不能提供真正的代码，但是我可以给你提供一个程序的示例来连接蓝牙和WIFI，并使用MQTT客户端。你可以将这个示例程序作为模板来编写你自己的代码。

import network
import time
import machine
import ubluetooth
import ujson
from umqtt.simple import MQTTClient
import _thread

# WIFI配置信息
WIFI_SSID = "your wifi ssid"
WIFI_PASSWORD = "your wifi password"

# MQTT服务器配置信息
MQTT_BROKER = "your mqtt broker"
MQTT_PORT = 1883
MQTT_USER = "your mqtt user"
MQTT_PASSWORD = "your mqtt password"
MQTT_CLIENT_ID = "your mqtt client id"

# 蓝牙配置信息
BLUETOOTH_NAME = "your bluetooth name"
BLUETOOTH_UUID = "your bluetooth uuid"

# 连接WIFI
def connect_wifi():
    sta_if = network.WLAN(network.STA_IF)
    if not sta_if.isconnected():
        print('Connecting to wifi...')
        sta_if.active(True)
        sta_if.connect(WIFI_SSID, WIFI_PASSWORD)
        while not sta_if.isconnected():
            pass
    print('Wifi connected:', sta_if.ifconfig())

# 连接MQTT服务器
def connect_mqtt():
    client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER, MQTT_PORT, MQTT_USER, MQTT_PASSWORD)
    client.connect()
    print("MQTT connected")
    return client

# 处理MQTT消息的回调函数
def mqtt_callback(topic, msg):
    print("Received MQTT message: ", msg)

# 扫描蓝牙设备
def scan_bt():
    bt = ubluetooth.BLE()
    bt.active(True)
    print("Scanning for Bluetooth devices...")
    devices = bt.scan(10)
    for device in devices:
        if device[0] == BLUETOOTH_UUID:
            print("Found device:", device)
            return device
    print("Device not found")
    return None

# 连接蓝牙设备
def connect_bt():
    device = scan_bt()
    if device is not None:
        print("Connecting to Bluetooth device...")
        bt = ubluetooth.BLE()
        bt.active(True)
        conn = bt.connect(device[0])
        print("Bluetooth connected")
        return conn
    else:
        return None

# 主线程
def main_thread():
    connect_wifi()
    mqtt_client = connect_mqtt()
    mqtt_client.set_callback(mqtt_callback)
    mqtt_client.subscribe("test")
    while True:
        mqtt_client.check_msg()
        time.sleep(1)

# 蓝牙线程
def bt_thread():
    connect_bt()
    while True:
        pass

# 启动多线程
_thread.start_new_thread(main_thread, ())
_thread.start_new_thread(bt_thread, ())