Big Fredd's Corner Multi-Sensor

thingiverse

This is a corner mounted DIY Multi-sensor that I designed. It has a PIR (motion) sensor at the top, a brightness sensor just below that, and a temp/humidity/pressure sensor mounted on the bottom surface. These are connected to an ESP8266 NodeMCU to communicate with your home automation devices. All were printed with the outward side facing the build plate. I did not try without supports, but they are highly recommended. I used the following components: NodeMCU: https://www.amazon.com/gp/product/B07CB4P2XY/ PIR Sensor: https://www.amazon.com/gp/product/B07RT7MK7C/ Lux Sensor: https://www.amazon.com/gp/product/B01HTC5OYI/ Temp/Humidity/Pressure: https://www.amazon.com/gp/product/B07KYJNFMD/ You will also need some DuPont jumpers. I used a DuPont kit and crimper. Dupont Kit: https://www.amazon.com/gp/product/B07BDCG7DW/ Crimper: https://www.amazon.com/gp/product/B01CE4FAMW/ You will need a microUSB cable with 5V power to power this device up. The PIR and Lux sensor are a snug fit, no fasteners required. The Temp sensor mounts with one 3mm X 6mm screw. The NodeMCU mounts with two 3mm x 6mm screw. The NodeMCU holder requires two 3mm x 6mm min screws to attach to the front piece. You can use longer. The back cover is held closed with one 3mm x 6mm min screw. You can use longer. I have 6 of these around my house to trigger lights based on motion and brightness. I use Home Assistant and also used the ESPHome plugin to configure these boards. You could also use Tasmota to do this if you do not want to use ESPHome. To fit this in nicely, all devices were powered with 3.3V headers. Pin D5 was used for PIR (including the GND and 3.3V adjacent) for an easy 3 pin connection. Pins D1 & D2 were used for the I2C bus pins. The remaining 3.3V and GND that are adjacent were used to power the I2C devices. Making my own cables allowed me to easily parallel the temp and lux sensor for the I2C BUS. I used a pair of 3M command Strips (shortest ones, 0.6" x 1.8") to mount these to the wall. The temp sensor is on the bottom because including it inside the box it saw a few degree temp rise due to heat from the NodeMCU. Putting it on the bottom solved this issue.