SIM7600E AT command transparently transmitted to ESP32 Arduino code and BIN firmware

Code:
#include <HardwareSerial.h>



// Define hardware serial ports

HardwareSerial SimSerial(1);     // Use hardware serial port 1 (GPIO9 and GPIO10)

HardwareSerial ExtendSerial(2);  // Use hardware serial port 2 (GPIO13 and GPIO14)



void setup() {

  // Initialize the extended serial port (hardware serial port 2)

  ExtendSerial.begin(115200, SERIAL_8N1, 13, 14); // RX=GPIO13, TX=GPIO14

  while (!ExtendSerial) {

    ; // Wait for the extended serial port to connect

  }



  // Initialize the SIM7600 serial port (hardware serial port 1)

  SimSerial.begin(115200, SERIAL_8N1, 9, 10); // RX=GPIO9, TX=GPIO10

}



void loop() {

  // If data is received from the extended serial port, forward it to the SIM7600 module

  if (ExtendSerial.available()) {

    while (ExtendSerial.available()) {

      char data = ExtendSerial.read();

      SimSerial.write(data);

    }

  }



  // If data is received from the SIM7600 module, forward it to the extended serial port

  if (SimSerial.available()) {

    while (SimSerial.available()) {

      char data = SimSerial.read();

      ExtendSerial.write(data);

    }

  }

}