m5stack + sim800l



  • 0_1585063663830_sim800l.png

    To start understanding the functioning of the sim800l module I used the following example:

    //Reset resistance is not soldered. If necessary, weld it yourself.

    #include <M5Stack.h>
    #define RX_PIN 16
    #define TX_PIN 17
    #define RESET_PIN 5

    void header(const char *string, uint16_t color){
    M5.Lcd.fillScreen(color);
    M5.Lcd.setTextSize(1);
    M5.Lcd.setTextColor(TFT_MAGENTA, TFT_BLUE);
    M5.Lcd.fillRect(0, 0, 320, 30, TFT_BLUE);
    M5.Lcd.setTextDatum(TC_DATUM);
    M5.Lcd.drawString(string, 160, 3, 4);
    }

    void setup() {
    M5.begin();

    header("SIM800L AT command", TFT_BLACK);
    M5.Lcd.setTextFont(2);
    M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
    M5.Lcd.drawString("Please use serial port to Test AT command.",0, 35, 2);
    // Host serial communication
    Serial.begin(115200);

    // SIM800L serial communication
    Serial2.begin(115200, SERIAL_8N1, RX_PIN, TX_PIN);
    pinMode(RESET_PIN, OUTPUT);
    }

    void loop() {

    //AT instruction write
    if(Serial.available()){
    Serial2.write(Serial.read());
    }

    //AT instruction result
    if(Serial2.available()){
    Serial.write(Serial2.read());
    }

    delay(10);

    }

    I sent some at command to understand if the module worked but apparently it doesn't work. Any suggestions?


  • M5Stack

    Hi @Nicolaf899 I cannot help you here as I was not able to get the sim800l working myself, please refer to the recent topic http://forum.m5stack.com/topic/1785/sim800l-gprs-mqtt I pasted some links there with information about sim800l. Where possible please check if there is a discussion going on about this module and ask your questions there instead of duplicating a thread, thanks



  • @lukasmaximus said in m5stack + sim800l:

    Hi @Nicolaf899 I cannot help you here as I was not able to get the sim800l working myself, please refer to the recent topic http://forum.m5stack.com/topic/1785/sim800l-gprs-mqtt I pasted some links there with information about sim800l. Where possible please check if there is a discussion going on about this module and ask your questions there instead of duplicating a thread, thanks

    okk thank you