Finally completed my multi-sensor prototype. Rather than using a hobby grade PIR sensor that’s prone to false alarms (due to pets and RF interference) I used a commercial alarm grade PIR with pet rejection.
I’ve added a temperature and humidity sensors externally mounted on the back. The Wemos D1 mini fits perfectly into the existing case and is now setup so I can push new firmware to it OTA (over-the-air)!
Welcome to the New World of ESP