sir DerStrom you are so awesome. thank you very much for saying RF . i just have a one problem. is there a device that can transmit RF and receive it .maybe i need two device for this project. the one is the transmitter and other is the received( correct me if I'm wrong sir) . but the big problem is what is this device.
You were asking what board would be best to measure distance using RF. You were no longer asking what the board in the video was. That's why I posted the link.
Now, I hope you know that the board is not the microcontroller--the chip ON the board is the microcontroller. There is a difference.
Anyway, the boards just look like a transmitter and receiver set, at least one has an RS232 connector.
I noticed you commented on the youtube video. Why don't you just wait for the people who made it to answer, instead of asking us to try to decipher a terrible video?
sorry sir for asking different question which is not related to my title. don't worry i will open a knew topic for RF distance measurement. but still thank you for everything.