When I connect my Ender 3 Pro via USB to a PC or Android device it connects and I see it in the corresponding software (Octoprint, Cura...) but when I send a command to it nothing happens. The screen either shows "Homing Failed: PRINTER HALTED Please Reset" or freezes or the board even beeps (when heating the bed)
What did you already try to solve it?
Tried different devices, software (Windows/Cura, Octo4a), and cables. Setting baudrate.
Have you tried running in safe mode?
Safe mode won't start. But I thinks it might be a problem on the Marlin side...
I tried without SD card, same problem.
Will try with taping later, but that's an OTG related problem is it? I get the error while connected to a PC as well.
ok, I feel stupid posting this but others shall benefit from my stupidity. Here's the solution:
You have to turn the printer on (manually).
When I connected the device the printer screen turned on and I assumed there's a relay switch connecting the PSU but apparently there isn't. You still have to physically flip the "on/off" switch on the printer. It failed when I sent commands because the e.g: motors used more power that was available through the device.
