Below you have the code for the radio chat module. The code is the same for both transmitter and receiver. So, just download it from below and upload it to both Arduinos and then we could make a test and see if it works and we could caht between the modules. But you will need some libraries as well. Below you will find those as well for the CC1101 radio module and the OLED display. So download those and install them to the Arduino IDE. Then, uplaod the code. You could dwonlaod the zip file with the code or just copy it from below.