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 Arduino sketch allows you to track GPS coordinates using an ESP32 board, SIM800L GSM module, and NEO-6M GPS module. The GPS coordinates are sent to an MQTT broker for further processing or ...

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 ...

This paper describes the design of a 3D printer fire detection system (3DP-FDS) with a GSM connection, its purpose being to avoid fire accidents. The key feature of the system is the ability to send ...

This paper presents the design and development of a real-time river health monitoring system using the Arduino UNO microcontroller platform. ... turbidity, total dissolved solids (TDS), and ...