nanoDLP

I'm having the same issue :  SLAVE    Serial Communication Error EOF

However
My printer however is not moving with CW

And in addition act erratically:
When the printer is connected to the raspberry PI, there is no way for me to connect to nanodlp. It will reconnect as I unplug the printer.
Sometime the printer moves once or twice and stop again.
even happen to move and ignore the z/min sensor and force the platform on the vat.

Also tested cable and unplug things, but not result.

I'll try to revert the firmware tonight and talking with Wanhao team, but if anyone has any other suggestion for a solution, it will really help.