Tronxy Prusa 13 clone LCD upgrade

Hi there.

Wonder if anyone can help me, I have a Tronxy P802m prusa i3 clone running marlin firmware on a melzi board. Now I want to install a touch screen which is a TFT Maker base one, now I know that the Melzi board I have wont be able to use it but if I buy a new board like the nearest to a melzi board with a 8 pin EXT fitted, will I be able to fit that board and print as normal?. (I take it i cant use just any board out there).

If it can be done what is the best way to do it and which board is compatible with my printer.


Any help on this would be great thank you in advance.


eekeek

That screen is not a normal screen. It doesnt work on normal screen plugs but as you say a aux-1 as defined on ramps board.

It requires access to the serial ports of the controller.

If you look at the 10 pin EXT plug on the melzi It can be made to work

You need to set the screen for external power, as the melzi cant supply enough.

then connect up gnd, D10/RX1 and D11/TX1 from EXT to the display
Then change your firmware to user serial 1
ie #define SERIAL_PORT 0 becomes #define SERIAL_PORT 1 in configuration.h

this will stop your usb cable from working and enable the screen

If the baud rates are the same, it should now work.

Hi there Dust,

I will let you know if I can it working in the next few days.

Thank you for your very knowledgeable and detailed answer to my question


Regards

eekeek