Re: help needed for RF communication b/w two AT89S52 control
Hello,
for a point-to-point connection, UHF transceiver modules could be a simple technique. They are available from many companies, EasyRadio https://www.lprs.co.uk/ is a good product to my opinion. You could also build your own transmitters from TI/Chipcon chips, but this requires deeper knowledge of HF engineering.