In the Good Display example, the message was clear. One MUST end a writing action with a "sleep".
That leaves me with two questions:
What is the detriment if the sleep cmd is not included. This is not because I want to leave it out but because it helps me if I understand the effect on the hardware.
in the GxEPD_Example.ino I cannot find the sleep command.
Any thoughts, references I can check?
UPDATED: Link to Good Display example example code
UPDATE#2: Found this passage in the Good Display FAQs ".. In the case of long-term non-refresh, we need to power off the electronic paper or put it into deep sleep mode, otherwise it will damage the IC."