Hello Community,
i have so much troubles with the communication with the host software and the arduino with ramps 1.4
first of all i burned 2 mega2560 ;-( (with ramps connected)
without everything working.... (burn marlin firmware ...)
i have a short circuit with the rx on the ramps and the +12V
now i cut off the rx line (ramps 1.4) and everything working ;-)
have a nice day ;-)