owenb321/eink_ambient_display

Ambient E-Ink Display

Overview

ESPHome project using an e-paper display to show information meant for quick glances.

Hardware

• Waveshare 7.5" Epaper Display
• Adafruit HUZZAH32
• Adafruit TPL5111
• Adafruit 2500mah LiPo Battery

Details

This is a Home Assistant focused display that grabs sensor details from MQTT to optimize speed. An example of the Home Assistant config that this uses can be found here.

MQTT is used to expedite the update interval since the Home Assistant API takes up to a minute to provide new information. MQTT with persist flags allows ESPHome to pull the information immeditately upon waking up without connecting to the HA API first.

The Waveshare display consumes power during the ESP32 deep sleep so the TPL5111 timer is used to cut power between update intervals to maximize battery life. Battery life with a 2500mah LiPo has been about 3 months in real world usage.

The case is laser cut and can be screwed shut or just held together with the slot/tab design. SVG files for cutting are found in the case directory

eink_ambient_display's Issues

Battery drains in 4 days

Was just wondering how long your display lasts? Mine only lastst 4 days. I can post the code or if you want this it he link at esphome forum:

https://community.home-assistant.io/t/battery-empty-after-4-days-should-be-longer/492159

Help would greatly appreciated

do you have a configuration on how to push this sensors to mqtt

i tried to use this for my home but i am not a c++
programmer and i cannot figure out which format all these sensors have to be in mqtt

do you have an example config for this?

kind regards