Hello everyone, I am trying to use the arduino module sim800l but when i try to send some at command, like a siple AT, I get in response '???' in loop and I do understand the cause of this.
Another problem is the alimentation of this module that requires 2-3 A when it send messages, for now i would be happy if i can establish a undersandable comunication with it so I didn't put the sim in the slot.
Here is the code that I am using:
SoftwareSerial mySerial(2, 3); // RX, TX
// Open serial communication
// set the data rate for the SoftwareSerial port
Serial.println("Testing SIM800L module");
void loop() // run over and over
while( mySerial.available() )
The led of the module should blink every 3 seconds when it is connected to the sim network but it blinks every seconds and this means that it is trying to connect but it cannot so it restart the attempt of connecting.
I opened a new argoment at this link for this problem : sim800L problems to connecting to the sim network (blinking problem)