Example Code for Arduino-Temperature Sending (Based on IFTTT)

Hardware Preparation

• Arduino UNO board x1
• IO Expansion board x1
• WiFi IoT module x1
• LM35 Temperature Sensor x1
• Digital Push Button x1
• Wires

Software Preparation

• Arduino IDE
• Download and install the WiFi IoT Module Library. (About how to install the library?)

Wiring Diagram

Sample Code

    #include "DFRobot_WiFi_IoT_Module.h"
    #include <SoftwareSerial.h>

    int button = 7;

    //UART mode 
    //Use software serialport: D/R: 10, C/T: 11
    SoftwareSerial    mySerial(10, 11);
    DFRobot_WiFi_IoT_Module_UART IoT(&mySerial);


    //Configure WiFi name and password 
    const char *WIFI_SSID           = "hitest";
    const char *WIFI_PASSWORD       = "12345678";
    //Configure IFTTT
    const char *IFTTT_ADDRESS       = "maker.ifttt.com";
    const char *IFTTT_ENVENT        = "Temperature";
    const char *IFTTT_KEY           = "cdvP-sL1L9m3eld_T0xR3r";
    //IFTTT Send message 
    const char *IFTTT_VALUE_1       = "Value1";
    const char *IFTTT_VALUE_2       = "Value2";
    const char *IFTTT_VALUE_3       = "Value3";

    /********************************************************************************************
    Function    : getTemp
    Description : Get temperature detected by LM35
    Params      : 
    Return      : Converted temperature value 
    ********************************************************************************************/
    float getTemp()
    {
      uint16_t val;
      float dat;
      val = analogRead(A0);
      dat = (float)val * (5/10.24);
      return dat;
    }

    void setup() {
      //Use software serialport 9600 as communication port 
      mySerial.begin(9600);
      //Use serialport 115200 as print port 
      Serial.begin(115200);
      //Init communication port 
      while(IoT.begin() != 0){  
        Serial.println("init ERROR!!!!");
        delay(100);
      }
      Serial.println("init Success");
      //Connect to WiFi
      while(IoT.connectWifi(WIFI_SSID, WIFI_PASSWORD) != 0){  
        Serial.print(".");
        delay(100);
      }
      Serial.println("Wifi Connect Success");
      //Init HTTP
      while(IoT.HTTPBegin(IFTTT_ADDRESS) != 0){
        Serial.println("Parameter is empty!");
        delay(100);
      }
      Serial.println("HTTP Configuration Succeeded");
      //Init IFTTT
      while(IoT.IFTTTBegin(IFTTT_ENVENT, IFTTT_KEY) != 0){
        Serial.println("Parameter is empty!");
        delay(100);
      }
      Serial.println("IFTTT Configuration Succeeded");

      pinMode(button,INPUT);
    }

    void loop() {
      String data =(String)getTemp(); 
    //Press down button to send an Email recording the current temperature
      if(digitalRead(7) == 1)
      {
        IoT.IFTTTSendMessage("reminder","The current temperature is",data.c_str());
        Serial.println("send message success!");
      }
    }

Result

Press down the button, IFTTT sends an Email recording the current temperature to the corresponding mail box.