I took kobowm image made by pasqu4le ( and marek) and wrote simple python script to read MQTT messages and show them in dashboard. It also sends back battery information. I use it with Home Assistant but of course can be used with anything that speaks MQTT.
Instructions for installation and code in:
https://github.com/MarkoMarjamaa/HA_Kobo
And thanks for the tons of information I've got from this site.
Sorry for the oversized picture...