// Send CTRL+Z (ASCII 26) to indicate end of message sim800.write(26);
// Use software serial for flexibility, or hardware serial (Serial1 on Mega) SoftwareSerial sim800(10, 11); // RX=10, TX=11 sim800l proteus library
// The SMS content sim800.print("Hello from Proteus Simulation!"); delay(500); // Send CTRL+Z (ASCII 26) to indicate end of message sim800
Introduction In the world of embedded systems and IoT (Internet of Things) development, the SIM800L module has become a staple. This tiny, quad-band GSM/GPRS module allows microcontrollers like Arduino, PIC, and STM to make calls, send SMS, and connect to the internet. However, testing firmware with a physical SIM800L can be expensive, time-consuming, and risky. One wrong wiring connection (e.g., applying 5V to the 3.8V tolerant pin) can instantly fry the module. One wrong wiring connection (e
// Send SMS to a simulated phone number (any string works in simulation) sim800.println("AT+CMGS="+1234567890""); delay(1000);
// Forward user input to SIM800L (optional) while(Serial.available()) sim800.write(Serial.read());
