Tutorial: How to use SIM800L for Controlling Anything | Arduino | GSM Module

In this tutorial, you will be able to use the SIM800L GSM module for controlling anything through SMS. To do that, we just need to parse the incoming SMS from SIM800L through serial communication.

For more information visit my blog post:

OR you might interested in using ESP32 and a MicroPython instead:

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Thank you.

[davebate]

This video, and many other tutorial videos, show the RxD pin connected
directly to the Tx pin of a 5V Arduino ? The RxD pin on the SIM800L has
a MAXIMUM voltage level of 2.8V. It needs a potential divider network
to reduce the 5V signal from the Arduino to the 2.8V input on the
SIM800L module. I have no doubt it works without, but it is stressing
the SIM800L beyond acceptable limits, and I wonder how long it will
last.

[FrancisBano-cu]

hi sir i need help for our thesis project code fore detection using ultrasonic sensor and gsm module 800l that update me if near to overflow i hope u help me sir

[doosetdaramkhodahafez]

Hi sir i'm struggling powering the module can i use lm317 constant voltage circuit which will give me 3.9v thats all i have for now TIA 👍

[juliusalbalos]

Hi. Is the code respond to network signal lost? Does it scan network signal again if in case network signal issue occurs? Thanks

[erik.landen]

Thanks for a great tutorial, I only get this to work when commenting out "SIMULATE_BY_SERIAL" any idea why and what is the downside to use it that way?

[kylanicholereyes]

i have the same activity now. Did you use po power adapter here?

[johnbobbs]

Thanks for such an informative tutorial. Impressive

[evangelistajhofelc.]

hello, how to check available balance of gsm module?

[dremko]

hello at this moment which arduino module works at 4G?

[sagarghode]

Sir my Bsnl sim is not working in SIM800L it's sending sms but received sms is stored in other sim internal memory and not able view it's content, other sim cards working excellent but problem with Bsnl any settings or suggestions

[reddytoplay]

Di mag gana sakin sir😅 kahit naka comment out yung SIMULATE_BY_SERIAL SIM800L EVB kasi yung gamit ko, pero pag naka serial monitor gumagana din naman

[hamdiahmed]

thank you, I have practically the same tutorial, with the same hardware, I have made copy your program with some modifications of Number. I can't activate the leds with SMS received from my phone.
when I try to read the message received, the serial monitor displays these "????" characters.
Help please.

[SherkariRaja]

Great work sir, I'm following you since a year and making project with help of your video's, i had made an project which controls LEDs over call using DTMF, but i cannot figure out to make it to receive perticular mobile number, right now it is recovering all calls which gets to it, so need your small help to complete this,
Once again big thanks for your video's.

[sweetravencurranlabrada]

Sir can u help me in programming, if the event is about water sensor that every time it sense water it will send a message to the default number

[jimy]

hi, very nice tutorial, i have a question, im doing a project to control a notice board or a liquid crystal i2c display using the GSM, but it has to be password encrypted, so before the user sends any string of text, they must ensure to input the correct password on the arduino, for the sim shield to output the SMS message onto the screen, any ideas and help much appreciated.

[immtco]

Hola, ¿podrías ayudarme?, ambos dispositivos funcionan por separado, el arduino ejecuta los comando si los meto manualmente en el monitor serial, y el SIM800L indica que ya está conectado a la red (incluso enlaza si llamo al número que tiene), pero no mandan ni mensajes, ni los mensajes que mando hacen algo, y tampoco funciona escribir comandos AT, no hace nada (he visto que al poner "AT" mínimo debe responder "OK", pero no.
:(
Agradecería tu ayuda

[yawarsaeed]

Hi dear,
I want you to confirm that using simulate serial option, do I need the sim800 module to be connected to the breadboard or I can check the commands without the sim module only with the LEDs. Please reply .

[givenromeo]

i do not receive feedback/sms of led status

[vychau]

What generation of your sim used on the system? Can this system use 3G 4G sim instead of sim 2G? i used sim4G and seems like it didn't work :<

[mohamedminna]

Very useful video.
I have a problem. I want to turn lights on and off by sms as well as through dtmf and auto reply to the sender number. Is it possible.