From the above link, it is the code I used for home automation using sim800L module, arduino and relay.
I tried sending message and calling to switch on the relay, but neither worked.
I'm confused and don't know where the problem could be from.
Please, I need your help.
@bargain, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project See About the IDE 1.x category.
Bad wiring? Incorrect wiring? Maybe start with a simple example for the SIM800?
Please post your code here in code tags.
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