Hi Rongzhong I love my robot, just afraid it has an MPU issue Finished assembling my Nybble, then uploaded WriteInstinct.ino. At the MPU6050 calibration step, it connects successfully to the chip, but then I can see rows of numbers displaying in a loop and no end. All numbers are 0 except the 3rd one that makes sort of a cycle ( 0 => big number => negatives => 0,...) Video here: Last time I tried it lasted 45mn before I abort. My Nyboard is V0_2, and testMPU does not finish also. I get stuck on: Wait for first interrupt 😥