Gravity: WiFi IoT Module Example Code for STM32

This article describes how to use the WiFi IoT module with the STM32 development board, including sample code and library file addresses. It covers the configuration methods for MQTT, IFTTT, and ThingSpeak, providing practical references for developers looking to integrate wireless communication functions into STM32 applications.

Use with STM32

The WiFi IOT module can also be used with STM32 development board, and the functions achieved are the same. Here the details will be omitted. You can try it if you are interested.

WiFi IoT Module Library Address for STM32: https://github.com/DFRobot/DFRobot_WIFI_I0T_Module_STM32

Sample Code

#include "system.h"
#include "SysTick.h"
#include "led.h"
#include "usart.h"
#include "DFRobot_wifi_iot.h"

//wifi 
#define WIFISSID     "hitest"  //WiFi name 
#define WIFIPWS      "12345678" //wifi password 

//MQTT
//#define MQTT
#ifdef MQTT
#define SERVER        "iot.dfrobot.com.cn"  //server address 
#define PORT          "1883"                //Port number 
#define DEVICENAME    "rHpr0RcWR"           //User name 
#define DEVICESECRET  "9NtrAg5ZRz"          //User login password 
#define TOPIC         "OSpwrHHMg"           //Subscribe channel 
#endif

//IFTTT
#define IFTTT
#ifdef IFTTT
#define IFTTTKEY      "dtpfTlU3Wqa8y0HRh77xXE"
#define IFTTTEVENT    "BBB"
#endif

//ThingSpeak
//#define THINGSPEAK
#ifdef THINGSPEAK
#define THINGSPEAKKEY "U01NPZTC2G9WTDNY"
#endif

int main()
{
    u8 i=0;  
    SysTick_Init(72);
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);  
    LED_Init();
    //USB print port, corresponding pin: RX to PA10, TX to PA9
    USART1_Init(9600);
    //IOT communication port, corresponding pin: RX to PB11, TX to PB10
    USART3_Init(9600);
    //Connect to wifi
    connectWifi(WIFISSID,WIFIPWS);

    //Access EASYIOT
    #ifdef MQTT
    mqtt(SERVER,PORT,DEVICENAME,DEVICESECRET,TOPIC);
    #endif

    #ifdef IFTTT
    configIFTTT(IFTTTEVENT,IFTTTKEY);
    #endif

    #ifdef THINGSPEAK
    configThingSpeak(THINGSPEAKKEY);
    #endif
    while(1){

        #ifdef MQTT
        //send data shen using MQTT
        publish(TOPIC,"HI TANG");
        #endif
        #ifdef IFTTT
        //Access IFTTT, send messages to IFTTT registered event
        IFTTTSendMasage("100","78","78");
        #endif
        #ifdef THINGSPEAK
        //Access thingSpeak, send messages to ThingSpeak
        thingSpeakSendMasage("5000", "100");
        #endif
        i+=10;
        if(i%20==0)
        {
            i=0;
            led1=!led1;
        }

        delay_ms(100);
        loop();
    }
}