I entered YYY, but did not upload OpenCat. Will try that today.

Have done all of these and I can control Bittle via console. Is there a command to read the status of the IR? I will change batteries first, maybe they were just faulty out of the box.

I removed the battery and then I uploaded WriteInstinct again. Recalibrated everything and now it is silent again. It stil does not respond to the remote or any command except c.

I have the same, I received it assembled, I upload testServos.ino, it started to move like a mad dog. I quickly turned it off and since then it did not start anymore. I have charged the battery, I ran default WriteInstinct and I have pressed the reset button. It stays in kneeled mode (like for calibration). I ran calibration, it resulted in all offsets to 0. I can use the c command, but nothing else. When I unplug it from the computer, press the power button, it flashes blue and then after 5 seconds turns itself off. How can I read / debug the Bittle? Other idea's are also welcome, of course