It's a tested design that I'm currently not using myself: https://github.com/ranseyer/MySensors-HW/tree/master/Experimental/ESP32/50x33 Space for -RFM69 or 95 (the small footprint) -LiPo controller -MYSX Connector

Error: One connection is missing to measure the battery voltage.

An EPaper AddOn tested with this is already available: https://github.com/ranseyer/MySensors-HW/tree/master/Experimental/ESP32/AddOn The AddOn is for two types of smaller displays as well as optional sensors. It is only tested with the ESP32 board. The goal would be to run it on ATMega, etc., too. Boards is running.

PS: I also have a few boards left, these are available on request. This is not a sales thread!