T-SIM7000G test

main.cpp

#include "Arduino.h"

#define SerialAT Serial1

#define PIN_DTR     25
#define PIN_TX      27
#define PIN_RX      26
#define PWR_PIN     4

bool reply = false;

void modem_on() {
    // Set-up modem  power pin
    Serial.println("\nStarting Up Modem...");
    pinMode(PWR_PIN, OUTPUT);
    digitalWrite(PWR_PIN, HIGH);
    delay(300);
    digitalWrite(PWR_PIN, LOW);
    delay(10000);                 //Wait for the SIM7000 communication to be normal, and will quit when receiving OK

    int i = 10;
    Serial.println("\nTesting Modem Response...\n");
    Serial.println("****");
    while (i) {
        SerialAT.println("AT");
        delay(500);
        if (SerialAT.available()) {
            String r = SerialAT.readString();
            Serial.println(r);
            if ( r.indexOf("OK") >= 0 ) {
                reply = true;
                break;;
            }
        }
        delay(500);
        i--;
    }
    Serial.println("****\n");
}

void setup() {
    Serial.begin(115200); // Set console baud rate
    SerialAT.begin(115200, SERIAL_8N1, PIN_RX, PIN_TX);
    delay(100);

    modem_on();
    if (reply) {
        Serial.println(F("***********************************************************"));
        Serial.println(F(" You can now send AT commands"));
        Serial.println(F(" Enter \"AT\" (without quotes), and you should see \"OK\""));
        Serial.println(F(" If it doesn't work, select \"Both NL & CR\" in Serial Monitor"));
        Serial.println(F(" DISCLAIMER: Entering AT commands without knowing what they do"));
        Serial.println(F(" can have undesired consiquinces..."));
        Serial.println(F("***********************************************************\n"));
    } else {
        Serial.println(F("***********************************************************"));
        Serial.println(F(" Failed to connect to the modem! Check the baud and try again."));
        Serial.println(F("***********************************************************\n"));
    }
}

void loop() {
    while (true) {
        if (SerialAT.available()) {
            Serial.write(SerialAT.read());
        }
        if (Serial.available()) {
            SerialAT.write(Serial.read());
        }
        delay(1);
    }
    Serial.println("Failed");
    setup();
}

platformio.ini

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:esp32dev]
platform = espressif32
board = esp-wrover-kit
framework = arduino
upload_port=/dev/ttyUSB0
monitor_port = /dev/ttyUSB0
monitor_speed = 115200