I finished the case for my base station. I found an easy way to insert threaded nurled inserts into the plastic and then the PCBs can be attached with screws.
Incidentally, the base station receives LoRa packets from the sensor and posts them to the web using WiFi.
The single button is for FOTA. A single press on the recessed button/LED combo button requests it to go out the web and download my latest firmware. It takes about 30s to load new firmware.