#include <SoftwareSerial.h> SoftwareSerial sim800(2, 3); // RX, TX void setup() Serial.begin(9600); sim800.begin(9600); sim800.println("AT");

AT → OK AT+CMGF=1 → OK AT+CMGS="+1234567890" → > (prompt for message) | Real Feature | Simulated? | |--------------|-------------| | UART/AT commands | ✅ Partial | | Call/SMS sending | ❌ Rarely works | | GPRS/HTTP | ❌ Not simulated | | Network registration | ❌ No | | Signal quality | ❌ No | | Real-time delays | ❌ No | Conclusion: You cannot test actual SMS sending, calling, or internet in Proteus. The library is only useful for testing AT command logic and UART communication flow . 7. Better Alternatives to SIM800L Simulation If you need to simulate GSM behavior more realistically:

In Arduino code:

When simulated, you’ll see AT and then OK in the Virtual Terminal if the library works. The SIM800L Proteus library is a limited but useful teaching aid for AT command flow. For real GSM development, always test on physical hardware. If you must simulate, consider using a virtual COM port + script for better control.

| Source | Reliability | Features | |--------|-------------|----------| | | Medium | Basic AT command echo, SMS simulation | | Github (search: “SIM800L Proteus”) | Low to Medium | Often unfinished or buggy | | Electronic Clinic / Microcontrollers Lab | Medium | Tutorial-focused, works for specific MCUs | | Proteus user forums | Low | Some shared libraries, use with caution |