Projects › Projects › how to interface a rf tranmitter and receiver to microcontroller AT89S52? › you need encoder-decoder
February 19, 2014 at 4:42 am #11055
you need encoder-decoder chips and 433 MHz transmitter receiver pairs. but in this case you need some IO port pins to be free to get decoded data.
if you dont have any pins left then two options
1) use FSK transreceiver both sides that can be directly connected to Tx Rx pins
2) use serial bluetooth module at both sides