Build Marlin Firmware for Mks tinybee and Ulti_controller
November 24, 2023 02:47PM
Hello,
I'd like to use a Mks Tinybee Board (esp32 based) to repair my ultimaker 2 printer.

Is that possible to setup Ulti_controller to use with this board please ?
Thanks
Re: Build Marlin Firmware for Mks tinybee and Ulti_controller
November 25, 2023 01:37AM
The Ulti_controller is rather specifically designed for the original controller.

It is not plug in compatible with other controllers. (do not just plug it in)

So at minimum, hardware wise, you will need a custom cable for the non standard 3.3v pin on exp2

Circuit diagram [github.com]

The display is 3.3v i2c (3.3v is provided by the controller, vs most other displays which generate 3.3v from 5v)
the sdcard is 3.3v SPI
the leds are on a 3.3v i2c device PCA9632 but the leds are actually on 5v.

The lcd board uses a PCA9306 to convert expected 5v i2c signals from the controller to the lcds 3.3v i2c signals.
And the lcd uses 74HC4050D to convert expected 5v spi signals from the controller to the lcds 3.3c spi signals for sdcard

Will either of these continue to work with 3.3v signals from the tinybee?? unknown


None of this i2c stuff has been tested on a Tinybee at all.

Your in very much uncharted waters.
Re: Build Marlin Firmware for Mks tinybee and Ulti_controller
November 25, 2023 04:25PM
Ok thanks, it would have been so nice !
Do you think it's a hard work to test if it works ?
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