// Send SMS to a simulated phone number (any string works in simulation) sim800.println("AT+CMGS="+1234567890""); delay(1000);
// Use software serial for flexibility, or hardware serial (Serial1 on Mega) SoftwareSerial sim800(10, 11); // RX=10, TX=11 sim800l proteus library
// Forward user input to SIM800L (optional) while(Serial.available()) sim800.write(Serial.read()); // Send SMS to a simulated phone number