No partial refresh on 863~928 LoRa WiFi BLE 2.13" 212x104 E-Ink

#1

Hi there,

I got the “863~928 LoRa WiFi BLE 2.13” 212x104 E-Ink" V1.1.
Using Arduino with the “WiFi LoRa 32(V3)” board the example from https://github.com/HelTecAutomation/Heltec_ESP32 is working.

This example always updates the display using the reset method, which is impractical for a smooth application.

The examples from https://github.com/HelTecAutomation/Heltec-E-Ink do not work.

How can you apply a partial refresh?

#2

Is this just the Wireless Paper (v1.1)?

#3

It’s fully a integrated device with E-Ink, ESP32, WiFi etc.

#4

20240818_122740
20240818_122740.jpg3024×4032 2.7 MB

#5

That is indeed the Wireless Paper. There are some excellent sketches on GitHub for this board that will likely help you.

#6

That is indeed the Wireless Paper.

Thank you. That was the missing hint! Following this setup: https://github.com/todd-herbert/heltec-eink-modules/blob/main/docs/WirelessPaper/wireless_paper.md and uncommenting

EInkDisplay_WirelessPaperV1_1 display;

the example worked.

And the board supports partial refresh, as in the example:

Here's fastmode,
aka Partial Refresh
Don't use too often

Now there is only the question: “Why not use partial refresh too often?”

#7

I’m not an eink expert, but in short, the pixels “wear out” faster if not fully refreshed.

#8

So displaying the time: omit the seconds and update each minute makes it last longer.

#9

That’s definitely up the right street indeed