Support/examples for accessing cellular/LTE on ESP32-S3-SIM7670G-4G

example1.ino

#include <Arduino.h>

static const int RXPin = 17, TXPin = 18;
static const uint32_t GPSBaud = 115200;

String rev;

void SentSerial(const char *p_char) {
  for (int i = 0; i < strlen(p_char); i++) {
    Serial1.write(p_char[i]);
    delay(10);
  }
  Serial1.write('\r');
  delay(10);
  Serial1.write('\n');
  delay(10);
}

bool SentMessage(const char *p_char, unsigned long timeout = 2000) {
  SentSerial(p_char);

  unsigned long start = millis();
  while (millis() - start < timeout) {
    if (Serial1.available()) {
      rev = Serial1.readString();
      if (rev.indexOf("OK") != -1) {
        Serial.println("Got OK!");
        return true;
      }
    }
  }
  Serial.println("Timeout!");
  return false;
}

void setup() {
  Serial.begin(115200);
  Serial1.begin(GPSBaud, SERIAL_8N1, RXPin, TXPin);

  while (!SentMessage("AT", 2000)) {
    delay(1000);
  }
  
  SentMessage("ATD10086;", 2000);
  SentSerial("ATE1;");
  SentSerial("AT+COPS?");
  SentSerial("AT+CGDCONT?");
  SentSerial("AT+SIMCOMATI");
}

void loop() {
  if (Serial1.available()) {
    rev = Serial1.readString();
    Serial.println(rev);
  }
}

But have you successfully execute sms in your waveshare module?

From memory this was for sending messages (i.e. AT Commands) over serial to the AT chip (whilst I was trying to establish network access) - not sending text messages over SMS. The example function names can be slightly misleading.

Some examples out there that might help:

Using TinyGSM library to send SMS (don't think it supports receiving SMS): https://github.com/search?q=repo%3Avshymanskyy%2FTinyGSM+sendsms&type=issues

This might also be helpful: https://github.com/vshymanskyy/TinyGSM/blob/master/examples/AllFunctions/AllFunctions.ino

If instead of using a library, you want to use AT commands directly, the AT Command Manual (e.g. https://files.waveshare.com/wiki/ESP32-S3-SIM7670G-4G/SIM767XX_Series_AT_Command_Manual_V1.01.pdf) might be helpful.

I think the command you're after is AT+CMGS, but they're a pain to work with.

Thanks boss for the advice and guidance. I appreciate it a lot! but didnt work at those libraries need to reverse engineer those codes to make it functional , its really pain to work with AT commands my first time to deal with.

…

On Tue, Mar 11, 2025 at 10:03 AM Leigh Hunt ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ But have you successfully execute sms in your waveshare module? From memory this was for sending messages (i.e. AT Commands) over serial to the AT chip (whilst I was trying to establish network access) - not sending text messages over SMS. The example function names can be slightly misleading. Some examples out there that might help: Using TinyGSM library to send SMS (don't think it supports receiving SMS): https://github.com/search?q=repo%3Avshymanskyy%2FTinyGSM+sendsms&type=issues This might also be helpful: https://github.com/vshymanskyy/TinyGSM/blob/master/examples/AllFunctions/AllFunctions.ino If instead of using a library, you want to use AT commands directly, the AT Command Manual (e.g. https://files.waveshare.com/wiki/ESP32-S3-SIM7670G-4G/SIM767XX_Series_AT_Command_Manual_V1.01.pdf) might be helpful. I *think* the command you're after is AT+CMGS, but they're a pain to work with. — Reply to this email directly, view it on GitHub <https://gist.github.com/leighghunt/016f615ba5af4816482cd7d264b68411#gistcomment-5483747> or unsubscribe <https://github.com/notifications/unsubscribe-auth/BQKUN4EXWYQXN7SCOA4WJGL2TY77HBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTGMJTHA2TIOBRU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .