The SIM800L module needs special attention because it operates at 3.3V logic levels while Arduino uses 5V. We need a voltage divider circuit to protect the SIM800L from damage. If you are new to the ...

This project monitors voltage using a potentiometer connected to an Arduino. When the voltage reaches 4.8V or higher, the system automatically sends an SMS and makes a phone call using the SIM800L GSM ...

Once installed, restart the Arduino IDE to apply the changes; After installing the library, the FONA library must be included first, followed by the HardwareSerial library. Then, serial pins should be ...

SIM900A/SIM800l GSM module (MOD3) 1: 16× ... Fig. 2 shows the circuit diagram of the automatic daily meal reminder system. It is built around the Arduino Uno (MOD1), RTC3231 (MOD2), SIM800L GSM module ...

The system is made using sensors like GPS Neo 6m, Arduino, GSM Sim800L. Here, different IoT platforms, Different IoT tools, sensors, different programming libraries, APIs usages, server hosting and ...