Is there any working way to connect 2 x displays to an Olimex ESP32 board ? My main problem is that 2.8 inch display is too little, I want something bigger. So, either I will have to buy a bigger display - 4 inch - from another vendor and pray to work with Olimes ESP32 OR find a way to connect 2xMOD-LCD2.8RTP to Olimex ESP32 board. Or any other idea welcomed - like use other Olimex display - which one/how ?
Is is still true that pins 3 and 4 are not used on UEXT, thus I can use one of them as SS/SSEL for a second SPI connector ? Is this possible ? Working ? Because , otherwise, if I have to find some free GPIO's on the board, I need to solder and is becoming too complicated
Please advise ideas .
THank you.
Which Olimex ESP32 board?
If it is ESP32-EVB, it would be very hard to connect two MOD-LCD2.8RTP boards.
This one: ESP32-POE-ISO ( https://www.olimex.com/Products/IoT/ESP32/ESP32-POE-ISO/open-source-hardware )
All options should be possible then.
Yeah you can probably use one of the UEXT pins for chip select. As mentioned in the table at Github: https://github.com/OLIMEX/MOD-LCD2.8RTP/tree/master UEXT pins are not used. Just wire ESP32 UEXT pin 3 or 4 to MOD-LCD2.8RTP UEXT 10. You still need to use wires or maybe a splitter like:
https://www.olimex.com/Products/Modules/Interface/UEXTx5/open-source-hardware
You can probably have entire second SPI for second display, but this requires to have headers soldered.
A bigger display would also work as long as there is support for Arduino or other compatible enivronment.
thank you, yes, so I am already using UEXTx5
My idea is to connect the 2 displays to the UEXTx5 and for one display, I will cut the corresponding cable for SSEL(UEXT pin 10) from the CABLE-IDC10 ( will need probably 1-2 additional CABLE-IDC10 for trial&error cutting ) and connect it to another port on pin3 or 4.
I try to avoid soldering / too much wiring ... this is why I chosed the POE powered and UEXT, less wires, better connected, more simple.
UEXT is a very good solution.