Arduino Sim800l Relay Control with SMS | Control Home Appliances with Arduino and Sim800l

Hi,how can I integrate relay with the GSM module to send me messages.

How to use with 440v ac?

Hello,
Please, Can you give a Arduino code that two relay 'on' only for 1 minute and 2 minutes when i send 'ON' through sim900a

Excuse me sir, everything works great but if I add a digitalRead in the void loop the messages dont arrive, like the communication is affected. How should I implement that without affecting the serial comunication?

Friends, please don't be fooled by this channel and this person and nonsense projects, I tested them all and none of them actually work, don't waste your time.

Hi sir, when we received reply message, need the date and time together with notification,
How to add the code in CCLK?

Dear sir, I am used the sim800L with Arduino nano board control by the two relays ,
Send the sms 1 to ON the First relay for motor start button , after 3 seconds time delay to cut off.

Send the sms 2 to ON the second relay for motor stop button, after3 seconds time delay to cut off.

This function Working is fine and reply message also fine,

But I need how to check the motor last status on/ off,
Pls can doing the code for me thanks.

Why doesn’t it work when I unplug the arduino from my laptop and use a powerbank. If you know how to fix it please let me know.
It only works when the arduino is connected with a computer.

Does this gsm module work on 4g sim?

Dear sir, I need the same code but how to add the one master mobile number and how to check the last relay status ? Thank

hi
where to find the application '' sim800" to install it in the Gsm and send the sms
THANKS

Sim 800l relay control using telegram bot, this work?

Dear sir, I want same code but need to update the 2nos master mobile register with SMS, can help me to modify the code, thanks.

sir, i need the this code but same code how to add the 2 nos register phone number? last time your send the link for registered video, i try to change the code but cannot, can help to add the register numer with the same code, thanks.

Dear sir, 1)I need to receiving the message automatically when sim800L power On .
2) how to registered the master mobile number and how to change the mobile number with SMS,
3) can store the 2 no’s registered mobile number?, thanks.

My SIM800L stopped working because it’s only 3g. What module can I use that’s 4g or 5g compatible?

Dear sir, I have two questions 1)when gsm sim 800 power on, i need to received message, because here power cut 4 times per day,
2) how to change the mobile number from SMS.

Dear sir, how to change the mobile number?

Dear sir, how to turn off the relay after 3 seconds automatically? Pls change the code for me thanks