How to assemble a transmitter and receiver to turn on a light bulb?

Question

Do it yourself

Hello!
There was a need to create a small device, a transmitter and receiver.
The essence of the transmitter, if the relay is closed, the transmitter should turn on, and the receiver should light the diode when the transmitter is turned on.
The transmitter and receiver must confidently catch each other at a distance of 5 meters is no longer necessary. Preferably small sizes of both components.
Please provide diagrams.

Answer 1

Two RF modules + two AtTiny.
The scheme is outrageously simple, and the firmware does not shine with complexity.
If you have no idea what it is, then it’s better to tear apart a thread of a doorbell with a radio button or dig towards the ZIP for barriers.

Answer 2

Are you sure that it is worth doing soldering and setting up products?
At one time I used cheap car alarms for this. Keychain + car block - sweet deal!
Now there are wireless switches for the "Smart Home" - even cooler.

Answer 3

1. Chinese radio sockets/radio bulbs
   
2. Light Blue Been+ and iPhone
   
3. RasberryPi with Wi-fi dongle and at least turn it on from Turkey
   
4. Extended set of radio designer "Expert" (there seems to be everything you need, even instructions)
   

Answer 4

attiny24 + NRF24L01 Related
: www.doneathome.ru/archives/1384
You don't need anything else

Answer 5

MasterKit had a kit that solved this problem