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?

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> .