Wemos D1 Mini (ESP8266) & SHT30 Temperature & Humidity Sensor Case

thingiverse

This is a snap-fit case designed specifically for the Wemos D1 Mini & SHT30 Temperature & Humidity sensor shield. I've been testing several 'IOT' sensors around my house, sending temperature and humidity data to a node-red server every 5 minutes for nearly a year now, and I've finally got around to designing a case for them. For years, I've wanted to try making a functional snap-fit case using my 3D printer, but it's been tough. With the recent addition of an Anycubic Metal MEGA to my collection, which produces amazing results right out of the box, I decided to give it another shot. This case is the end result. I designed this snap-fit case in Fusion 360, with a hook and recess that are about 0.35mm wide/deep without any clearance. When printed at 0.1mm resolution, the fit is extremely tight but snaps together perfectly with a bit of effort and won't come apart easily even with a thin blade. There's ventilation at both ends to ensure air reaches the sensor as well as a 'cooling' vent for the ESP8266 because there have been reports of false temperature readings from the SHT30 version I'm using due to heat from the ESP8266 reaching the sensor through the PCB. Although they're in deep sleep mode most of the time, I haven't seen this issue so the 'cooling' vent might be unnecessary. Fusion 360 design is available at https://a360.co/2Uln38S and the firmware can be found on github: https://github.com/MarkJB/wemos-d1-mini-esp8266-mqtt-sht30-temp-sensor