Hi !
I bought two of these little 2.4G on ebay. Here is the datasheet : http://www.inhaos.com/uploadfile/otherpic/DS-RF2400-V11-EN.pdf
I 'm not sure how to connect them to the arduino Uno and which library would work. Do you think VirtualWire will work ?
And another question, do you think I can use that with an attiny85 if all the pins on this product are not used ?
Very interesting. This thing contains a "Beken BK2401/2421". This appears to be a clone of an nRF24L01+, after reading through the data sheet. There is some AVR code at Everything done inhouse .
I'd say try a library that targets nRF24L01+, like RF24, and see how that goes.
Theoretically you should absolutely be able to use attiny85. Never done it myself, but no reason it couldn't work.