Relay 2 can be Switch on by sending SMS with "POWERON2" and Switch off by sending SMS with "POWEROFF2". I have used Arduino nano with SIM900A GSM mdule with this setup and Solid State Relays to ...

This program can be use to open a door using an arduino MKR GSM 1400, a SD module, and a relay. The users allowed to open the door can make a call to the phone number of the sim card in the arduino to ...

Working Explanation In this project, Arduino is used for controlling whole the process. Here we have used GSM wireless communication for controlling home appliances. We send some commands like ...

In this arduino relay control tutorial we will simply learn How to interface a Relay with Arduino. Here we are not using any Relay Driver IC like ULN2003 and will only use an NPN transistor to control ...

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one ...

Today, GSM networks are widely-used, whether for making calls or sending SMSes. But some places need urgent messages like in colleges, railway stations, events, share market and so on, and this ...

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 article is a tutorial on how to control 16 relay through Arduino microcontroller with Ethernet shield W5100.