How Install Software part on Nybble ?

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 :

forum.arduino.cc

Hello everyone, I've been using the Arduino Uno R3 SMD Edition for about two months but, just now, I've encountered this issue: avrdude: verification error, first mismatch at byte 0x0000 0x62 != 0x0c avrdude: verification error; content mismatch The message appears every time I try to upload any kind of program to the Arduino so I think it's a board problem. If you have any suggestions or need more information please reply!

- 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