GxEPD2 Library, is grey levels possible?

Using Arduino Displays
1

I thank @ZinggJM for the effort to create these libraries. They are exactly what I was looking for.

My display is "GoodDisplay GDEW027W3

I am using the GxEPD2 library and was wondering; are levels of gray possible and I haven't found it yet. If not could they be?

Is this something I might be able to kludge together from the multicolor display code?

Thanks
John

2

Hi John

No, GxEPD2 doesn't support grey levels.

But you are lucky, GxEPD2_4G does support your GDEW027W3.

Take a look at README.md of library GxEPD2_4G.

There is a short explanation of how it works, and which display panels are supported.
Note that using the same approach on panels that are not four grey levels "capable" may look horrible on those; the grey parts look "dirty".

Jean-Marc

3

Thank you again :slight_smile:
I'll try the _4G

John

4

Sorry to bother you but I have a issue I haven't been able to track down.

I'm successfully using the "GxEPD2_4G_Example.ino" with my EDP.

However the serial output is pushing a lot of what looks like testing print on the IDE serial monitor (see below). I'm pretty sure they are for troubleshooting, however I've not been able to suppress them.

Thanks

John

_PowerOn : 102637
_Update_4G : 1432481
_PowerOff : 29024
_PowerOn : 102522
_Update_4G : 1432596
_PowerOff : 29025
_PowerOff : 1

5 
  display.init(115200);

is the cause. Try with 0 or empty. There should be a comment, got lost, it seems.

6

Thank you :slight_smile:
I had noticed the number was the same as the serial but didn't think they were related.

John