Hi Folks,

Sorry im new in this. My Prusa i3 (from Sintron) is nearly completed, except pronterface wont connect. my baudrate is 115200 on com3 what works with arduino and i can flash the eprom with marlin (1.1.0 R3).
I checked the usb drivers on Win 7 and they are 115200 baud, too.
I just wonder why im able to flsh the eprom but do not get access with pronterface. Looks for an usb problem for me but i cant figure out where to look at.

im pleased for any help or hints.

Thanks!!!

some more specs:
Sintron Prusa i3
BOARD_RAMPS_14_EFB
SERIAL_PORT 3
BAUDRATE 115200
LCD: REPRAP_DISCOUNT_SMART_CONTROLLER
MK8 Extruder
Win 7 Machine

Edited 1 time(s). Last edit at 01/24/2016 01:37PM by Brizzasor.

Once you've flashed Marlin, the Baud rate is defined in configuration.h :

// This determines the communication speed of the printer
#define BAUDRATE 250000

-Olaf

Hi Olaf,
Thanks for your help.
At least I found my problem. I had my computer work with com 3, and thought I should put this into marlin too. What was wrong. Now I have port 0 in marlin and it works finally.

So problem solved.