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 ...

The connection of the GSM module with the Arduino board is established serially. The Tx pin and the Rx pin of the GSM module are connected to the Rx pin and the Tx pin of the Arduino board ...

SIM800L Module Pinout. The SIM800L module is a GSM/GPRS module that offers a wide range of functionalities. It resembles a small chip with an antenna connector and various pins. The below image shows ...

As shown in Fig. 1, Arduino Board 1 and GSM module get ground connection through transistor TIP142 (T1). Also, very little drive current (<5mA) is required from Board 1. A 12V, 2A regulated power ...

ia92.zip - MQTT Utility for testing Publish and Subcribe Topic. To Run -> Double Click on wmqttSample.jar in "J2SE" Folder (ensure JDK is installed). WMQTT.zip - The library for Arduino to ...

You can connect any intrusion detection unit (such as a light fence or a motion sensor) to the input connector J2. Note that an active-low (L) at pin 1 of connector J2 triggers the security system.

In this project, the author is going to construct a system using a Arduino Development board and GSM module. He connects a switch/sensor to the Arduino board along with the GSM module. The user ...

An Arduino is equipped with a piezo sensor to detect impact, and a GSM shield takes care of the texting. It’s an interesting concept, similar to requiring police officers to wear body cameras.

The connection to the GSM M-590 module is only 2400 bps, and slow enough for a bitbanged UART. ... Of course, we’ve seen GSM and cell phone shields for Arduino before.