ESP8266接入阿里云物联网平台上传温湿度数据 |
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ESP8266接入阿里云物联网平台上传温湿度数据
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简介
本文章使用NodeMCU(ESP8266)开发板和SHTC3温湿度传感器接入阿里云物联网(IoT)平台，并上传读取到的温湿度数据。每秒读取一次温湿度数据，每30秒上传一次30秒内的温湿度的平均值。可以自己修改一下程序使用其他温湿度传感器。本文程序使用Arduino IDE开发。 DHT11和DHT22温湿度传感器数据读取的程序：https://blog.zeruns.tech/archives/527.htmlESP8266开发环境搭建教程：https://blog.zeruns.tech/archives/526.html SHTC3的SDA引脚接NodeMCU的D5引脚，SCL引脚接NodeMCU的D6引脚。 首先注册阿里云账号并开通物联网平台：https://www.aliyun.com/product/iot?source=5176.11533457&userCode=jdjc69nf&type=copy 然后打开物联网平台的控制台：https://iot.console.aliyun.com/product 接着按照图片提示创建产品
按照图片提示添加设备
需先安装PubSubClient、ArduinoJson、SparkFun SHTC3这三个库。 然后按照下面的教程修改PubSubClient.h 按照代码中文字提示修改参数即可。 #include /* 依赖 PubSubClient 2.4.0 */ #include /* 依赖 ArduinoJson 5.13.4 */ #include #include /* 连接您的WIFI SSID和密码 */ #define WIFI_SSID "路由器SSID" #define WIFI_PASSWD "密码" /* 设备的三元组信息*/ #define PRODUCT_KEY "设备PRODUCT_KEY" #define DEVICE_NAME "替换DEVICE_NAME" #define DEVICE_SECRET "替换DEVICE_SECRET" #define REGION_ID "cn-shanghai" /* 线上环境域名和端口号，不需要改 */ #define MQTT_SERVER PRODUCT_KEY ".iot-as-mqtt." REGION_ID ".aliyuncs.com" #define MQTT_PORT 1883 #define MQTT_USRNAME DEVICE_NAME "&" PRODUCT_KEY #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 // password教程 https://www.yuque.com/cloud-dev/iot-tech/mebm5g #define MQTT_PASSWD "参考上面password教程，算法工具生成，如果上面的教程看不懂就看文章下面" #define ALINK_BODY_FORMAT "{\"id\":\"ESP8266\",\"version\":\"1.0\",\"method\":\"thing.event.property.post\",\"params\":%s}" #define ALINK_TOPIC_PROP_POST "/sys/" PRODUCT_KEY "/" DEVICE_NAME "/thing/event/property/post" unsigned long lastMs = 0; float RH,T,RH_sum,T_sum; unsigned char count=0; WiFiClient espClient; PubSubClient client(espClient); SHTC3 mySHTC3; void callback(char *topic, byte *payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); payload[length] = '\0'; Serial.println((char *)payload); } void wifiInit() { WiFi.mode(WIFI_STA); WiFi.begin(WIFI_SSID, WIFI_PASSWD); //连接WiFi while (WiFi.status() != WL_CONNECTED) { delay(1000); Serial.println("WiFi not Connect"); } Serial.println("Connected to AP"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); Serial.print("espClient ["); client.setServer(MQTT_SERVER, MQTT_PORT); /* 连接WiFi之后，连接MQTT服务器 */ client.setCallback(callback); } void mqttCheckConnect() { while (!client.connected()) { Serial.println("Connecting to MQTT Server ..."); if (client.connect(CLIENT_ID, MQTT_USRNAME, MQTT_PASSWD)) { Serial.println("MQTT Connected!"); } else { Serial.print("MQTT Connect err:"); Serial.println(client.state()); delay(5000); } } } void mqttIntervalPost() { char param[32]; char jsonBuf[128]; sprintf(param, "{\"CurrentTemperature\":%f}",T_sum/count); sprintf(jsonBuf, ALINK_BODY_FORMAT, param); Serial.println(jsonBuf); boolean d = client.publish(ALINK_TOPIC_PROP_POST, jsonBuf); if(d){ Serial.println("publish Temperature success"); }else{ Serial.println("publish Temperature fail"); } //https://blog.zeruns.tech sprintf(param, "{\"CurrentHumidity\":%f}",RH_sum/count); sprintf(jsonBuf, ALINK_BODY_FORMAT, param); Serial.println(jsonBuf); d = client.publish(ALINK_TOPIC_PROP_POST, jsonBuf); if(d){ Serial.println("publish Humidity success"); }else{ Serial.println("publish Humidity fail"); } } void errorDecoder(SHTC3_Status_TypeDef message) // The errorDecoder function prints "SHTC3_Status_TypeDef" resultsin a human-friendly way { switch(message) { case SHTC3_Status_Nominal : Serial.print("Nominal"); break; case SHTC3_Status_Error : Serial.print("Error"); break; case SHTC3_Status_CRC_Fail : Serial.print("CRC Fail"); break; default : Serial.print("Unknown return code"); break; } } //https://blog.zeruns.tech void setup() { /* initialize serial for debugging */ Serial.begin(115200); Serial.println("Demo Start"); wifiInit(); Wire.begin(D5,D6); //初始化Wire（IIC）库 unsigned char i=0; errorDecoder(mySHTC3.begin()); } // the loop function runs over and over again forever void loop() { delay(1000); //延时1000毫秒 SHTC3_Status_TypeDef result = mySHTC3.update(); if(mySHTC3.lastStatus == SHTC3_Status_Nominal) //判断SHTC3状态是否正常 { RH = mySHTC3.toPercent(); //读取湿度数据 T = mySHTC3.toDegC(); //读取温度数据 RH_sum+=RH; T_sum+=T; count+=1; }else{ Serial.print("Update failed, error: "); errorDecoder(mySHTC3.lastStatus); //输出错误原因 Serial.println(); } Serial.print("Humidity:"); //向串口打印 Humidity: Serial.print(RH); //向串口打印湿度数据 Serial.print("%"); Serial.print(" Temperature:"); Serial.print(T); //向串口打印温度数据 Serial.println("C"); Serial.println("https://blog.zeruns.tech"); if (millis() - lastMs >= 30000) { lastMs = millis(); mqttCheckConnect(); /* 上报 */ mqttIntervalPost(); count=0; RH_sum=0; T_sum=0; } client.loop(); } 修改PubSubClient.h找到PubSubClient.h文件，将#define MQTT_MAX_PACKET_SIZE后的数字改为1024，将#define MQTT_KEEPALIVE后的数字改为60
password生成工具：http://iot-face.oss-cn-shanghai.aliyuncs.com/tools.htm 假设你的设备三元组数据如下 设备三元组 ProductKey = a14Xib5kdYd DeviceName = ESP8266 DeviceSecret = oLyaKqVxtRvjH284LdhqVgVUx1UPy6zq 建立MQTT连接时参数，这个信息是代码中的CLIENT_ID，可以自己设置 clientId = ESP8266 timestamp = 1234567890 signmethod = hmacsha1然后根据这些信息生成password的content clientIdESP8266deviceNameESP8266productKeya15ptdU1zhPtimestamp1234567890明文输入content，秘钥输入deviceSecret，点击hmac-sha1就可以生成password
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