Connecting two E Ink displays to a Pi 4?

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1

Hello,

I’d like to do a project where I connect two displays to a Pi 4: an Inky Impression 4” and a Waveshare 4.2inch black/white E-Ink display module. As far as I can tell, there are enough pins on a Pi 4 for both, but I’m struggling to figure out exactly how to connect the pins to both the HAT and the display module.

Should I be using something like Mini Black HAT Hack3r: Mini Black HAT Hack3r? Are there better options to consider?

Thanks!

2

The number of the pins is not the relevant information. More important is which pins both displays use. Both displays could share the same SPI-bus, but not the same chip-select pin.

So you should start by listing the pins of both displays side by side. If you are unsure, post your listing here.

Note that if you don’t use the connectors of the displays but use cables, you have much more flexibility because you can re-route pins. But you also have to know how to change the drivers once you re-route pins.