#include <ESP8266WiFi.h> #include <PubSubClient.h> #include <Wire.h> #include <SparkFunBME280.h> BME280 atmosSensor; String tStr; String pStr; String hStr; char tArr[4]; char pArr[4]; char hArr[4]; void setup() { Setup wifi, mqtt, etc. } void loop() { float tempReading ...
const client = mqtt.getAliyunIotMqttClient(options); // 2. 监听云端指令 client.subscribe(`/${options.productKey}/${options.deviceName}/user/get`) client.on('message', function(topic, message) { console.log("topic " + topic) console.log("message " + message) }) setInterval(function()...
Learn how to publish BME680 sensor readings via MQTT with the ESP8266 NodeMCU to any platform that supports MQTT client. We'll publish sensor readings to Node-RED.
LiquidCrystal_I2C lcd(0x27,16,4); //蓝牙模块 #include <SoftwareSerial.h> // Pin10为RX,接HC05的TXD // Pin11为TX,接HC05的RXD SoftwareSerial BT(10, 11); /*---变量设置*---*/ int lock= 7;//电磁锁 float read_val;//读取数据 char c_length[10]; char temp[] = "T"; String c...
theidto update the current position displayed on the web page And finally, theonchangeattribute to call the servo function to send an HTTP request to the ESP32 when the slider moves. Adding JavaScript to the HTML File Next, you need to add some JavaScript code to your HTML file using the...
#define MQTT_SERVER "58.250.86.2" #define MQTT_PORT 2375 #define MQTT_USRNAME "mqttt" #define CLIENT_ID "ESP8266|securemode=3,timestamp=1234567890,signmethod=hmacsha1|" // 算法工具: http://iot-face.oss-cn-shanghai.aliyuncs.com/tools.htm 进行加密生成password ...
+ float = (serverSendTime+ server+ deviceRecvTime - deviceSendTime) / 2; 64 + // 过期时间 = 当前时间 + 1小时 65 + float expireTime= now + 1 * 60 * 60 * 1000; 66 + // 加密认证,密码为:mqtt密码 & 过期时间 & 授权码(可选),如果产品了授权码就必须加上 67 + String...
client.setServer(mqtt_server, mqtt_port); client.setCallback(callback); } void loop() { if (!client.connected()) { reconnect(); } client.loop(); unsigned long now = millis(); if (now - lastMsg > 2000) { lastMsg = now; ++value; snprintf (msg, MSG_BUFFER_SIZE, "hello world...
whenever a Mqtt message comes in. It parses the Mqtt message which is in the popular JSON format. The commands which are communicated within JSON are explainedhere. In principle there is a command for every mode, when the command “set mode to off” is send the mode is set to offMode...
本例程实现了以下功能: 通过SIM800L连接网络 连接阿里IOT平台() 调用SHT20的库采集温湿度 将温湿度信息以及LBS定位信息上传至IOT 与阿里云IOT平台进行对时 每5分钟采集一次, 采集完成就休眠 #include<Arduino.h>#include"PubSubClient.h"#include"aliyun_mqtt.h"#include"ArduinoJson.h"#include"uFire_SHT20.h...