thingsboard 使用 MQTT 连接到 esp32
问题我想用 MQTT 连接 ESP32 到 demo thingsboard,我用 umqtt.simple 连接,但是有问题。每当我尝试连接时,它都会给我这个(文件“umqtt/simple.py”,第 99 行,连接中)或(文件“umqtt/simple.py”,第 57 行,连接中
索引器错误:列表索引超出范围),我相信它们是相同的。尽管当我尝试将 ESP32 连接到 thingspeak(进行一些编辑)时,它可以完美地连接、发送和接收数据。那么问题是什么?
我的代码:
import machine
import time
from machine import Pin, PWM
from umqtt.simple import MQTTClient
from time import sleep
import random
import json
import network
#################MQTT###################
def connect():
username="USER_NAME"
broker="demo.thngsboard.io"
topic = "v1/devices/me/telemetry"
client = MQTTClient(username,broker)
try:
print("uuuuuuuuuu")
client.connect()
except OSError:
print('Connection failed')
sys.exit()
data = dict()
data["see"] = 15
data2=json.dumps(data)#convert it to json
print('connection finished')
client.publish(topic,data2)
print("kkkkkkkkkkkkkkkkkk")
time.sleep(5)
#print("Sending OFF")
connect()
我也看到了一个问题,他也有类似的问题,但是他没有提供解决方案就解决了:
设备未使用 MQTT 连接到 Thingsboard
当然,我会将它连接到互联网。
回答
问题似乎是micropython中的umqtt只支持不认证或者用户密码认证。
所以我将代码编辑如下:
import machine
import time
from machine import Pin, PWM
from umqtt.simple import MQTTClient
from time import sleep
import random
import json
import network
#################MQTT###################
def connect():
username="Your_Token"
broker="demo.thingsboard.io"
topic = "v1/devices/me/telemetry"
Mqtt_CLIENT_ID = "Client_ID" # Max. Number is 23 due to MQTT specs
PASSWORD=""
client = MQTTClient(client_id=Mqtt_CLIENT_ID, server=broker, port=1883, user=username, password=PASSWORD, keepalive=10000)
try:
client.connect()
except OSError:
print('Connection failed')
sys.exit()
data = dict()
data["see"] = 15
data2=json.dumps(data)#convert it to json
print('connection finished')
client.publish(topic,data2)
print("Data_Published")
time.sleep(5)
#print("Sending OFF")
connect()
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