Hello. I have a question, what is this?
`“images/EInkBG.png” Can you post it?
Thanks!
All sensors update once per hour, during operating hours (not 10 pm - 6 am). For the 7.5" displays with the large battery, they’re down to 75% battery after running continuously 06Jun25 - 17Nov25 (5 months).
I’m expecting the displays to need recharging maybe once every 2 years. This is unconfirmed as the experiment is on-going.
In other words, the basic design works, with the very low power consumption of a FireBeetle 2 when sleeping, a large battery that still fits in a small case, and code that wakes up for about 15 seconds, once per hour, to update the display.
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change model to model: 7.50in-bV3-bwr
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It seems most people have used the USB port to permanently power the display.
What can you use battery wise if you want to hang the display on the wall like a frame?
I cant tell you what to use, i can tell you though, what you cant use.
I had this brilliant idea to buy a powerbank, add a USB-C connector to the outside of my 3D printed box and attach that to the charge port of the powerbank and then just connect the ESP32 and e-paper to the “output” of the powerbank.
BUT…Apparantly, powerbanks have a minimum power draw, if you are below that, they just shut down, because they think nothing is attached.
My current implementation hasn’t suffered from the powerbank shutting off but my next job is to implement sleep on the device which could trigger it I suppose.