Sim800l module

[Souheil]

I can't find any example about sim800l module. Can you help with that.

[m5stack]

it use AT command, so you can use the serial<->serial2 program to test it.
if (Serial2.available()) {
int inByte = Serial2.read();
Serial.write(inByte);
}

// read from port 0, send to port 1:
if (Serial.available()) {
int inByte = Serial.read();
Serial2.write(inByte);
}

bps=9600

[Souheil]

Can I use:
HardwareSerial Serial1(1);
to declare RX and Tx for communication between the board and sim800l module?

[m5stack]

no serial1, m5stack offer serial0 and serial2