RAK14000, still the best choice?

SR7673 · April 25, 2023, 1:10pm

Hi all,
i’m about to try a RAK-14000 e-ink, https://aliexpress.com/item/1005003431595237.html

Just to be sure, does that work together with RAK4631 on RAK19007?
Is it the best choice or are there larger and/or cheaper modules available?

And how is that connected to the RAK19007? Is there a cable included? I see no one from the description…

garth · April 25, 2023, 4:14pm

It is the only supported eink model, it does not work with a GPS and has small ribbon cables to connect the display and three button pad to the 40 pin module. There is not really any cases available.

Currently the 1.3" oled is the most popular screen.

mark.birss · April 25, 2023, 6:01pm

Anyone of the other added e-Ink displays can be selected when building from source, simple just change the e-ink display by uncommenting select e -ink display model in the code, refer to screenshot

Connect up using a RAK13002 IO board , RAK1400 board, DESPI-C02 or Waveshare e -ink Hat or to the e-Ink itself if it has its own driver board

github.com

meshtastic/firmware/blob/master/src/graphics/EInkDisplay2.cpp

#include "configuration.h"

#ifdef USE_EINK
#include "EInkDisplay2.h"
#include "GxEPD2_BW.h"
#include "SPILock.h"
#include "main.h"
#include <SPI.h>

#define COLORED GxEPD_BLACK
#define UNCOLORED GxEPD_WHITE

#if defined(TTGO_T_ECHO)
#define TECHO_DISPLAY_MODEL GxEPD2_154_D67
#elif defined(RAK4630)

// GxEPD2_213_BN - RAK14000 2.13 inch b/w 250x122 - changed from GxEPD2_213_B74 - which was not going to give partial update
// support
#define TECHO_DISPLAY_MODEL GxEPD2_213_BN

This file has been truncated. show original

Refer this PR for links to.purchase the other e-Ink displays

github.com/meshtastic/firmware

Add 1.54, 2.9 and 4.2 inch e-Paper support for RAK4361 boards - with partial updates for faster screen transitions

meshtastic:master ← markbirss:master

opened 09:36AM - 25 Feb 22 UTC

markbirss

+70 -12

This PR is an further enhancement of [PR1199](https://github.com/meshtastic/Mesh…tastic-device/pull/1199) to add 1.54, 2.9 and 4.2 inch e-Paper support with partial updates for faster screen transitions Library _____ T-ECHO - Is initialised and implemented differently and still requires (https://github.com/meshtastic/GxEPD2) 1.54, 2.9 and 4.2 inch - uses current public GxEPD2 library https://github.com/ZinggJM/GxEPD2.git The RAK14000 2.13 inch b/w 250x122 display does now supports partial updates Purchase links ____________ 200x200 1.54 inch e-paper display high resolution 200x200 partial refresh fast speed GDEW0154M09 https://www.buy-lcd.com/products/-381 296x128 2.9 inch e-paper display SPI Support for partial refresh 4 grayscale e-ink module screen GDEW029T5D https://www.buy-lcd.com/products/-51 300x400 4.2 inch e-ink panel SPI interface 4 Grayscale buy e-paper display partial refresh GDEW042T2 https://www.buy-lcd.com/products/-85 Epaper HAT Connection Adapter Board for E Ink Display https://www.buy-lcd.com/products/-27

I have justed tested 2 new diplays also

2.9 and 5.83 inch

SR7673 · April 25, 2023, 6:11pm

@mark.birss
Excellent, just excellent! That’s what i wanted to try in the end, a real display of a decent size.
So it just needs a I2C link.

Maybe you can show us some links where to order the displays you took? Just for some orientation…

From the video i also got my question answered how the separate e-ink board is connected to the RAK19007.

mark.birss · April 25, 2023, 6:19pm

These e-Ink displays use SPI and needs 5/6 gpio pins in total and 3.3/5v and GND

That why i was able to use a Ethernet connection

The purchase links are included in the pull request i posted above

Good display supplies Waveshare and other companies with displays

The others i used are from MHET-Live and WeActStudio

The 2.9 is quite a nice size in my opinion

200x200
1.54 inch e-paper display high resolution 200x200 partial refresh fast speed GDEW0154M09

296x128
2.9 inch e-paper display SPI Support for partial refresh 4 grayscale e-ink module screen GDEW029T5D

300x400
4.2 inch e-ink panel SPI interface 4 Grayscale buy e-paper display partial refresh GDEW042T2

Epaper HAT Connection Adapter Board for E Ink Display

SR7673 · April 25, 2023, 6:37pm

Fine. I just found that DESPI-C02 on aliexpress:
https://aliexpress.com/item/1005004633084221.html
Ah and there is the complete store:
https://aliexpress.com/store/600281

SR7673 · May 16, 2023, 7:25pm

@mark.birss
I do now own a RAK14000. It is connected to the RAK19007 now. Cables should be connected correctly, just like shown at https://aliexpress.com/item/1005003431595237.html
The display does not show anything. Do i need to change some parameters? I already played around a bit, but…
Your advice could be helpful.

SR7673 · May 17, 2023, 5:31am

Uuuh, what a shame. I should have run the _eink firmware. Problem solved. Works nicely…