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+--- Thread: ESP32 E-ink wifi display (/showthread.php?tid=3182)
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ESP32 E-ink wifi display - Screenshot - 2021-01-06
Hi everyone, just wanted to share my Wi-Fi display code and plans.
It displays the chosen information of signalk on a 4.2 inch E-ink display. Power consumption is low (0.35W) with refresh rate of 2s, could be improved.
There is a waterproof button at the bottom to switch between display mode / information
It runs on 5v, but there is room for a transformer in the case
There might be some bugs in the code, still work in progress to add more signalK values (currently only ground speed and heading)
https://github.com/Pataclop/esp32-eink
RE: ESP32 E-ink wifi display - PaddyB - 2021-01-06
Looks good
Where did you get the e-ink display?
RE: ESP32 E-ink wifi display - Screenshot - 2021-01-06
Ordered it on AliExpress (along with the rest of the electronics)
https://fr.aliexpress.com/item/32827160632.html
RE: ESP32 E-ink wifi display - PaddyB - 2021-01-06
Thanks
RE: ESP32 E-ink wifi display - Sailoog - 2021-01-13
looks promising, please send a video to see screen refresh when possible, thanks!
RE: ESP32 E-ink wifi display - Screenshot - 2021-01-15
(2021-01-13, 12:29 PM)Sailoog Wrote: looks promising, please send a video to see screen refresh when possible, thanks!
Here is a video showing refresh time, display mode change, boot sequence and power consumption.
https://youtu.be/_f7zujoYDNE
RE: ESP32 E-ink wifi display - affinite - 2021-01-15
Nice
RE: ESP32 E-ink wifi display - Sailoog - 2021-01-17
Pretty good
RE: ESP32 E-ink wifi display - mhember - 2021-01-19
Very cool! I've done a similar thing with a pi one and a smaller ESP display, but I think your solution looks more developed and almost certainly uses less power.
I've tried to side / backlight my display (it is a 'by our bed, confidence at anchor' display) and it changes what is displayed depending on what the nav state of the boat is in, either with SOG or distance from anchor. I use the wind averaging plugin to provide average wind, and the anchor alarm functions to set state and then provide 'distance from anchor'. Had it in mind to provide alternative states but not got to that yet with the code.
The pi and display are mounted in a perspex 'horseshoe' in this nice wooden case that Hazel made, with a small LED that I tried to position to get light properly on to the display - does not really work I think the angle is wrong.
I'm using HTTP requests to get data from the server which I don't think is great - but skills not up to handling a websocket I'm afraid.
Thanks for the info and sharing code - I may well try and do more. I hope my terrible code provides some thoughts! One thing that has changes since this photograph was taken is that it now converts the wind direction to a text / compass rose (eg NNW etc) as this is easier to take in when tired but I don't have a photo of that (also mounted on our new boat now).
RE: ESP32 E-ink wifi display - mhember - 2021-01-19
Very cool! I've done a similar thing with a pi one and a smaller ESP display, but I think your solution looks more developed and almost certainly uses less power.
I've tried to side / backlight my display (it is a 'by our bed, confidence at anchor' display) and it changes what is displayed depending on what the nav state of the boat is in, either with SOG or distance from anchor. I use the wind averaging plugin to provide average wind, and the anchor alarm functions to set state and then provide 'distance from anchor'. Had it in mind to provide alternative states but not got to that yet with the code. It has been updated on this photo and the display now provides polar wind direction (eg NNW, NE, etc) as this is easier to absorb quickly when sleepy in a tight anchorage!
The pi and display are mounted in a perspex 'horseshoe' in this nice wooden case that Hazel made, with a small LED that I tried to position to get light properly on to the display - does not really work I think the angle is wrong.
I'm using HTTP requests to get data from the server which I don't think is great - but skills not up to handling a websocket I'm afraid.
[attachment=1269]
Thanks for the info and sharing code - I may well try and do more. Happy to post my terrible code (don't have it here) if useful.