Because existing ones were too bulky for me I have made this one:

-Arduino Nano

-RFM Stamp (large or small) LoRa or both common RFM69 sizes

-easy to set up voltage divider (distance and sorted values)

-Comes easiest in heat-shrinkable tubing...

-space for an inscription in calligraphy

Sources: https://github.com/ranseyer/MySensors-HW/tree/master/Gateway-RFM-RS485/V40-RFM-Mini

Status: Tested and running. (except for the I2C connector, voltage regulators are untested)

Translated with www.DeepL.com/Translator