SIM800L DTMF | DTMF Based Home Automation System

Published at : 23 Dec 2025

In this video I will show you how to control relay module with SIM800L DTMF commands using Arduino UNO. This is GSM based home automation project in which I will show you how to decode SIM800L DTMF commands using arduino then by using that DTMF Commands I will control the relay module. After watching this video you will be able to control relay and high voltage devices gsm phone call.

Materials:
1. SIM800L - https://amzn.to/3J48mlW
2. Arduino - https://amzn.to/3ZWKAz2
3. 2 Channel Relay Module - https://amzn.to/3l1aoem
4. Breadboard - https://amzn.to/3ysOvHX
5. Jumper Wires - https://amzn.to/3YRafs5

Software:
1. Arduino IDE

#SIM800L #DTMF #Arduino

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Useful Video Links
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Arduino Sim800l Relay Control
https://youtu.be/t-tYuwxPSg8

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Social Media Links
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Facebook:
https://facebook.com/ahmadlogs
Twitter:
https://twitter.com/ahmadlogs
GitHub:
https://github.com/ahmadlogs/
Youtube:
https://www.youtube.com/ahmadlogs?sub_confirmation=1

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Download Code
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https://github.com/ahmadlogs/arduino-ide-examples/tree/main/sim800l-dtmf

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Disclaimer
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Disclaimer: All videos are for educational purposes and use them wisely. Any video may have a slight mistake, please take decisions based on your research. This video is not forcing anything on you.

Warning: I will use High Voltages which if incorrectly or improperly used could result in serious injuries or death. So be careful of what you are doing because I will take no responsibility for any of your actions.

Warning: In some countries it is required to register gsm module from govt authorities before using it. So, get proper understanding of govt laws related to gsm technologies.