I have the SIM800C module shown in the attached photo, and I have an Arduino Mega. I just want to be able to send messages and do GET commands. My problem is simple: I have no idea how to connect it to the Mega. What I've tried is:
SIM800C -> Arduino Mega
5V -> 5V (I've also tried connecting the module to a phone charger, 5V & 2A)
V_TTL -> 5V (also have tried connecting it to the phone charger)
GND (just the one in the same side as the 5V) -> GND
TXD -> RX2
RXD -> TX2
But I can't get it to answer to AT commands. My code:
char c;
void setup() {
Serial.begin(9600); //Serial Monitor
Serial2.begin(9600); //SIM800C
delay(7000);
Serial.println("SIM800C Test");
}
void loop() {
while (Serial2.available()) {
c = Serial2.read();
Serial.print(c);
}
while (Serial.available()) {
c = Serial.read();
if (c == '>') {
//To send "CTRL+Z" after sending a text
Serial2.println((char)26);
} else {
Serial2.write(c);
}
}
}
Does anyone know the proper way to connect the module to the Arduino?
