Hello everyone ! I have a Nybble and now I try to install software on Nyboard. For information I have a Nyboard V0_2 . I'm lost in explanations because I saw differents way : on github here : https://github.com/PetoiCamp/OpenCat , it said that I must install opencat.ino in two times with comment out and uncomment #main_sketch and in PDF user manual it talk about WriteInstinct.ino . For now , I install first time the OpenCat.ino with comment out #main_sketch and activate #define AUTO_INIT. and next, I upload again Opencat.ino with activate Main_Sketch and desactivate Define auto_ini : Nybble move strangely ... Is it important WriteInstinct.ino ? I would like calibrate Nybble with Bluetooth Dongle and the OS App . NB : When I was uploading sketches I had numerous mistakes ( but i install all library and managers needs and the board is appear in "Tools" so I can choos the Nyboard . I receive the next mistakes : - avrdude verification error content mismatch - sorry - this program has been built without plugin support So , my principal question is : What is the exact procedure to install the softwares in Nybble ? Thanks by advance for your help !!! Best Regards , Ivan