思路同上一篇:
本例程实现了以下功能:
通过SIM800L连接网络
连接OneNet平台(通过新版MQTTs协议)
调用SHT20的库采集温湿度
将温湿度信息上传至OneNet
每5分钟采集一次, 采集完成就休眠

#include <Arduino.h>
#include "PubSubClient.h"
#include "Ticker.h"
#include "uFire_SHT20.h"
 
/*-------------------------------SIM800L 硬件定义----------------------------------*/
#define MODEM_RST 5       //SIM800L复位引脚接在GPIO5
#define MODEM_PWRKEY 4    //SIM800L开关机引脚接在GPIO4
#define MODEM_POWER_ON 23 //SIM800L电源引脚接在GPIO23
#define MODEM_TX 27       //SIM800L串口TX引脚接在GPIO27
#define MODEM_RX 26       //SIM800L串口RX引脚接在GPIO26
 
/*-------------------------------其他硬件定义-------------------------------------*/
#define LED_G 13
uFire_SHT20 sht20;
#define SerialMon Serial //调试串口为UART0
#define SerialAT Serial1 //AT串口为UART1
/*-------------------------------Modem相关定义-------------------------------------*/
#define TINY_GSM_MODEM_SIM800 // Modem is SIM800
//引入TinyGSM库. 在引入之前要定义好TINY_GSM_MODEM_SIM800,让它知道我们用的模块型号
#include <TinyGsmClient.h>
// 创建一个关联到SerialAT的SIM800L模型
TinyGsm modem(SerialAT);
// 创建一个GSM型的网络客户端
TinyGsmClient gsmclient(modem);
PubSubClient client(gsmclient);
// Your GPRS credentials (leave empty, if missing)
const char apn[] = "CMNET"; // Your APN
const char gprsUser[] = ""; // User
const char gprsPass[] = ""; // Password
const char simPIN[] = "";   // SIM card PIN code, if any
 
/*-------------------------------云平台相关定义-------------------------------------*/
const char *mqtt_server = "183.230.40.96"; //onenet 的 IP地址
const int port = 1883;                     //端口号
#define mqtt_devid "esp_device001"         //设备ID
#define mqtt_pubid "370098"                //产品ID
//鉴权信息
#define mqtt_password "version=2018-10-31&res=products%2F370098%2Fdevices%2Fesp_device001&et=4092512761&method=md5&sign=MUV%2BKFLzv81a4Bw6BDrChQ%3D%3D"
 
char msgJson[75]; //要发送的json格式的数据
char dataTemplate[] = "{\"id\":123,\"dp\":{\"temp\":[{\"v\":%.2f}],\"humi\":[{\"v\":%.2f}]}}";
 
/*-------------------------------初始化SIM800L-------------------------------------*/
void setupModem()
{
  pinMode(MODEM_POWER_ON, OUTPUT); //电源引脚
  pinMode(MODEM_PWRKEY, OUTPUT);   //开关机键引脚
 
  // 先打开SIM800L的电源
  digitalWrite(MODEM_POWER_ON, HIGH);
  //根据手册要求拉下PWRKEY 1秒钟以上 可以开机
  digitalWrite(MODEM_PWRKEY, HIGH);
  delay(100);
  digitalWrite(MODEM_PWRKEY, LOW);
  delay(1000);
  digitalWrite(MODEM_PWRKEY, HIGH);
  SerialMon.println("Initializing modem...");
  modem.init(); //开机后modem初始化一下
}
/*-------------------------------SIM800L连接GPRS-------------------------------------*/
void modemToGPRS()
{
  //连接网络
  SerialMon.print("Waiting for network...");
  while (!modem.waitForNetwork(240000L))
  {
    SerialMon.print(".");
    delay(500);
  }
  SerialMon.println(" OK");
  //连接GPRS接入点
  SerialMon.print(F("Connecting to APN: "));
  SerialMon.print(apn);
  while (!modem.gprsConnect(apn, gprsUser, gprsPass))
  {
    SerialMon.print(".");
    delay(10000);
  }
  SerialMon.println(" OK");
}
/*-------------------------------向云平台发送温湿度数据-------------------------------*/
void sendTempAndHumi()
{
  if (client.connected())
  {
    snprintf(msgJson, 75, dataTemplate, sht20.temperature(), sht20.humidity()); //将模拟温湿度数据套入dataTemplate模板中, 生成的字符串传给msgJson
    Serial.print("public the data:");
    Serial.println(msgJson);
    client.publish("$sys/370098/esp_device001/dp/post/json", (uint8_t *)msgJson, strlen(msgJson));
    //发送数据到主题
  }
}
/*-------------------------------向云平台断线重连-------------------------------------*/
void clientReconnect()
{
  if (modem.isNetworkConnected())
  {
    while (!client.connected()) //再重连客户端
    {
      Serial.println("reconnect MQTT...");
      if (client.connect(mqtt_devid, mqtt_pubid, mqtt_password))
      {
        Serial.println("connected");
      }
      else
      {
        Serial.println("failed");
        Serial.println(client.state());
        Serial.println("try again in 5 sec");
        delay(5000);
      }
    }
  }
  else
  {
    Serial.println("网络断了,不可能连上了, 把数据存在本地等待下一次联网吧");
  }
}
 
void setup()
{
  pinMode(LED_G, OUTPUT);
  Wire.begin();
  sht20.begin();
  SerialMon.begin(115200);                                //初始化调试串口
  SerialAT.begin(115200, SERIAL_8N1, MODEM_RX, MODEM_TX); //初始化AT串口
 
  setupModem();  //SIM800L物理开机
  modemToGPRS(); //modem连接GPRS
 
  //连接OneNet并上传数据
  Serial.println("connecting to OneNet IOT...");
  client.setServer(mqtt_server, port);                   //设置客户端连接的服务器,连接Onenet服务器, 使用6002端口
  client.connect(mqtt_devid, mqtt_pubid, mqtt_password); //客户端连接到指定的产品的指定设备.同时输入鉴权信息
  if (client.connected())
  {
    client.subscribe("$sys/370098/esp_device001/cmd/request/#"); //订阅命令下发主题
    sendTempAndHumi();
  }
  else //如果客户端没连接ONENET, 重新连接
    clientReconnect();
  delay(500);
  //进入睡眠
  esp_sleep_enable_timer_wakeup(300000000);
  Serial.println("now sleep");
  esp_deep_sleep_start();
}
 
void loop()
{
  client.loop();
}

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链接：https://blog.csdn.net/finedayforu/article/details/108638598