I am trying to upload the old version of the GitHub code on it. I am first uploading WriteInstinct.ino and the confirmation results. When I upload Nybble.ino, I keep getting 0s on serial monitor and it doesn't seem like it wants to respond to any command.
I tested the servos and the components and they seem to be okay. I don't understand what could have gone wrong and I have no more ideas to check. I made sure I connected the servos in the right way.