Comments on: Control a 12V Lamp via SMS with Arduino https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Thu, 20 Mar 2025 15:54:36 +0000 hourly 1 https://wordpress.org/?v=6.8.2 By: Sara Santos https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-1018289 Thu, 20 Mar 2025 15:54:36 +0000 http://randomnerdtutorials.com/?p=43696#comment-1018289 In reply to David Odira.

Hi.
You can use something like this: https://randomnerdtutorials.com/esp8266-hi-link-hlk-pm03/
Regards,
Sara

]]> By: David Odira https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-1018254 Thu, 20 Mar 2025 13:56:30 +0000 http://randomnerdtutorials.com/?p=43696#comment-1018254 In reply to Sara Santos.

What of if you want to use 240V to power your system and control a 15W Bulb

]]> By: Sara Santos https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-913126 Mon, 06 May 2024 11:01:32 +0000 http://randomnerdtutorials.com/?p=43696#comment-913126 In reply to Giuseppe.

Thanks.
I’m glad this tutorial was useful.
Regards.
Sara

]]> By: Giuseppe https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-912780 Sun, 05 May 2024 18:53:05 +0000 http://randomnerdtutorials.com/?p=43696#comment-912780 After trying a lot of ‘projects’ with the sim900 and arduino, finally one that goes on at first power up!
Many thanks to the author for a clear and complete description on how to reach the goal.
Ciao

]]> By: verby romido https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-872724 Sat, 18 Nov 2023 11:00:03 +0000 http://randomnerdtutorials.com/?p=43696#comment-872724 Hi
when i upload the program code to arduino it says sketch uses 6106 bytes (18%) of program storage space. maximum is 32256 bytes. Global variable use 477 bytes (23%) of dynamic memory, leaving 1571 bytes for local variables. Maximum is 2408 bytes. what should i do?

]]> By: Sara Santos https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-756515 Thu, 09 Jun 2022 09:05:41 +0000 http://randomnerdtutorials.com/?p=43696#comment-756515 In reply to Andy.

Hi.
Check the Serial Monitor baud rate.
Regards,
Sara

]]> By: Andy https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-756462 Wed, 08 Jun 2022 23:19:09 +0000 http://randomnerdtutorials.com/?p=43696#comment-756462 Hello everyone, hope somebody can helpme; I follow all the steps very sharp of the tutorial and it dosnt work, simply do anything only recive weird characters on arduino IDE monitor serie went I send sms ON or OFF or STATE

A
? ??
?,m

++?MJ?j
++MIJJ?),m
+???*?HLK?
?il
++??
+??M?++?MJ?j

]]> By: Sara Santos https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-686140 Tue, 19 Oct 2021 17:21:50 +0000 http://randomnerdtutorials.com/?p=43696#comment-686140 In reply to António Venâncio.

That’s great!
It seems like a great project.
Regards,
Sara

]]> By: António Venâncio https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-685600 Mon, 18 Oct 2021 13:55:10 +0000 http://randomnerdtutorials.com/?p=43696#comment-685600 I’m making an integrated alarm, irrigation and lighting control system with mega arduino and sim 900.
The alarm sends a message to the mobile phone in case of intrusion.
Irrigation is switched on/off via SMS but guns autonomously, starting the cycle at sunrise and sunset, controlled by a light sensor.
This article is a good help.

]]> By: Sara Santos https://randomnerdtutorials.com/control-a-12v-lamp-via-sms-with-arduino/#comment-679274 Wed, 06 Oct 2021 13:45:29 +0000 http://randomnerdtutorials.com/?p=43696#comment-679274 In reply to Langat.

Hi.
As long as you add the right logic to the code, you can control the relay from any number.
Regards,
Sara

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