The aim is to be able to sense when the power goes off( loadshearing,power outages) and to be able to switch off wireless relays.
Using inverter for backup power but need to be able to cut off high power appliances like kettle, stove, microwave, Geyer.
I’m struggling to get grasp of using digitalWrite & Read over wireless protocol.
I only need basic digitalRead over the air to digitalWrite and if possible 5 separate units executing the digitalWrite from the one unit’s digitalRead.
Is there a basic method to do this so i can get some Basic results quick
What is the distance ?
Which Arduino board do you want to use ?
How reliable should it be ?
The digitalRead() and digitalWrite() do not go over the air. A package of data or a single command is transmitted. For example a number: 100 = turn led on, 101 = turn led off.
I hope you plan to use good quality relays. Not those from Ebay/Aliexpress/Amazon. A 10A relay from Aliexpress can switch 0.5A.
Your effectivly switching mains appliances on and off remotly so a fair bit of care is needed in the construction of such devices so that they are safe and reliable.
Always break your project down into chunks. Just concentrate on getting an arduino to link wirelessly with whatever system you are using. You only need to send data of any type. Use online examples.
Once you receive any data you get to choose what you do with it.
Lots of info on relay boards etc but I would advised using an LED to start with. Get it to turn on and off. Remember it is the principles that matter. If you can turn off and on an LED with an arduino AND you can receive wireless data then you can smoosh the two together!