4.2" e-paper desk stand

Epaper dashboard

The design is used to run zivyobraz.eu service, where you can define anything on e-paper displays (calendar, date, sensor data, home assistant data, etc..)

Model variants

• Sensor attachment can be done in 2 ways -  2 variants of models are upladed
  • 2mm screw (1.9mm hole)
  • slide on stub

Assembly instructions

1. Place the display into frame
2. slide BackWall to the top and tilt down while putting flex cable through the hole
3. (optional) Attach by M3x4-6 screws. There are click-in tabs, but I recommend securing it with screw.
4. Attach PCB (M3x4-6)
5. Attach battery. You can use ziptie channels, or double sided tape to attach an 18650 stand.

Video intructions:

Commercial use

In case you want to sell this design, or adjust and sell, contact me and we can make specific agreement.

Adjustements

Feel free to remix and adjust. Fusion 360 file is provided.

Hardware

Control PCB

PCB is custom made by Dronecz.

Github repo: https://github.com/dronecz/ES3ink

Twitter: @dronecz

Printables: https://www.printables.com/cs/@Czechmaker_235513

Maybe it will be available on Tindie, or just DM him.

Temperature sensor

LaskaKit SHT40 sensor

Available here: https://www.laskakit.cz/laskakit-sht40-senzor-teploty-a-vlhkosti-vzduchu/

or Aliexpress.

Don't forget the QWIIC (usup) cable. 

Battery

Space is sufficient for 18650 battery, wether with cables, that you can zip-tie to base using provided channels.

Another option is to use double-sided tape to tape in a 18650 holder.

Bolts

Frame and BackWall are clocked together, but I recommend adding M3x4-6 bolt. 

PCB is held by M3x4-6

Sensor is held by 2mm screw.

Display

flex marking: HINK-E042A14-A0, SYX1802

GxEPD2 library:
GxEPD2_BW<GxEPD2_420_GDEY042T81, GxEPD2_420_GDEY042T81::HEIGHT> display(GxEPD2_420_GDEY042T81(/*CS*/ PIN_SS, /*DC*/ PIN_DC, /*RST*/ PIN_RST, /*BUSY*/ PIN_BUSY));