Sim7600ce-t wiring and connection to esp32

Projects Networking, Protocols, and Devices
1

Hello, I'm new here is anyone able to help with the SIM7600ce-t? I use Esp32

IMG-20260702-WA0005
IMG-20260702-WA00051920×3413 951 KB

image-1782966765263
image-17829667652631920×1440 628 KB

image-1782966025874
image-17829660258741920×1440 497 KB

2

try the following program which uses ESP32 Serial1 to communicate with an external serial device

// ESP32  Serial1 test - for loopback test connect pins RXD1 and TXD1

#define RXD1 16 // can map Serial1 and Serial2 to many ESP32 GPIO pins
#define TXD1 17 // check pin usage https://randomnerdtutorials.com/esp32-pinout-reference-gpios/

// for RS232 shield connect
// ESP32 RXD1 to TTL/RS232 Rx
// ESP32 TXD1 to TTL/RS232 Tx
// connect GND pins together and VCC to 3.3V on ESP32 5V on UNO ect
// for loopback test connect 9-pin D_type connector pins 2 Tx to 3 Rx (pin 5 is GND)

void setup() {
  // initialize both serial ports:
  Serial.begin(115200);
  Serial1.begin(115200, SERIAL_8N1, RXD1, TXD1);
  Serial.printf("\n\nESP32 serial1  test RXD1 pin %d TXD1 pin %d\n", RXD1, TXD1);
  Serial.printf(" loopback test connect pin %d to pin %d\n", RXD1, TXD1);
  Serial.printf("RS232: ESP32 pin %d RXD1 to TTL/RS232 Rx and pin %d TXD1 to TTL/RS232 Tx\n", RXD1, TXD1);
  Serial.printf("RS232 - loopback connect 9-pin D-type pin 2 Tx to pin 3 Rx\n");
}

void loop() {
  // read from Serial1, send to Serial
  if (Serial1.available()) {
    int inByte = Serial1.read();
    Serial.write(inByte);
  }
  // read from Serial, send to Serial1
  if (Serial.available()) {
    int inByte = Serial.read();
    //Serial.write(inByte);     // local echo if required
    Serial1.write(inByte);
  }
}

you may need to change the Serial1 baud rate

power SIM7600 module via the USB and try connecting
ESP32 RXD1pin 16 to SIM7600 TXD
ESP32 TXD1pin 17 to SIM7600 RXD
ESP32 GND to SIM7600 GND

serial monitor output when testing a SIM A7670 entering AT commands

*ATREADY: 1

+CPIN: SIM REMOVED
AT
OK
AT+CGMI
SIMCOM INCORPORATED
OK
AT+CGMR
+CGMR: A131B03A7670M6C
OK
AT+CGMM
A7670E-LASA
OK
AT+CSQ
+CSQ: 16,99
OK
3

I will try, thank you