I've bought two wireless modules based around the TI CC1101 Low-Power Sub-1 GHz RF Transceiver. They also have an MCU (Atmel) on them so one could simply hook them up to power + RX + TX and they should act much like a wire.
I've setup an AVR to constantly send characters over UART and hooked it up to a TTL UART to USB board I have and could see the incoming transmission on the computer via Realterm (sort of a sanity check).
The next thing I did is to hook up one wireless module to the computer (via the UART to USB board) and one wireless module to the AVR. I can see the transmission LED lights up on the module however nothing is received at the computer end. I started to poke the wires and it seems that sometimes when I touch the board's GND with my hand it would have a positive affect on the module and it would work, but this is not constant.
To make sure the modules work I hooked the TX from the USB adapter to one wireless board and the RX to the other wireless board (as pictures) and this way the communication works perfectly.
I would appreciate any advice on this, the seller of the board is not very supportive.