Hi,
For one of my projects I have done serial communication between 89C52 and 89C2051 microcontrollers through the RXD, TXD pins. Can anybody pls suggest a method to make this communication wireless with minimum modifications.
I used ST-TX01-ASK as transmitter and ST-RX04-ASK as receiver. Get data at the DATA pin of the receiver(checked with oscilloscope). But level becomes too low when connected to the RXD pin of uC. Then tried with a load resistor. Even with 100KΩ load the level comes down from 5V to <2V.
Is this normal behavior OR something wrong with the device?
Do we need a buffer for connecting to the RXD pin?