@jobarjo Yes, there are implementations using mbed. If you go that route, you also get a nice BLE API to work with as well as all the standard mbed stuff. I haven't looked too closely at the Arduino board (Red Bear), but their source is on github so you can pull that and work with it without having the actual board.

https://hackaday.io/project/8512-nrf51822-development is my project for this chip. It includes a working project skeleton and instructions on setting up debugging. It uses a custom board that I made, but I suspect the one you linked to on ebay will work.

@jobarjo thanks for taking a look. The Wiring library isn't much more than a bunch of macros for the SDK. I chose to do it that way because SDCC will keep unused code in the output it generates. So yes, there is most everything you would expect if you are coming from arduino. digitalRead etc are all there.

There is also a very alpha version of the RF24 library. It is in C of course, so a small amount of porting is needed.

Let me know if you run into any problems. I am busy with another project at the moment with the nrf51822 SoC which is actually similarly priced and much more capable, although much more cumbersome to work with at the moment.

I've done a lot of work on this chip. Nothing for this project though.

You can take a look here.
https://hackaday.io/project/6270-io-node

@tekka I released my code under GPL3.