Unicorn - An ESP8266 thermometer and humidity meter

thingiverse

Unicorn is an ESP8266 based high precision wireless thermometer and humidity meter, powered by a single 18650 Li-Ion battery that can potentially last for a month thanks to ESP's deep sleep functionality. To achieve high accuracy, the device uses the SHT21 sensor, which measures temperature and humidity once measured, uploading the data to variables hosted on VariPass. **Features** * Measures temperature and humidity using an SHT21 sensor. * Tracks battery status as a percentage or voltage reading. * Connects to up to 8 different WiFi networks and switches between them seamlessly. * Uploads data to VariPass for secure storage. * A status LED indicates the success of the upload process when enabled, providing instant feedback. * Runs off a single 18650 Li-Ion battery for extended battery life. * Supports ESP's deep sleep feature for prolonged battery operation. * Offers extensive configuration options in the software for customized settings. * Features a slot on the back that fits an M5 countersunk screw, perfect for hanging on a wall. * Exposes a USB port for charging and programming convenience. * The case is designed to minimize heat transfer, ensuring optimal performance. **Required Hardware** * Croduino NOVA board * SHT21 Breakout sensor * Holder for 18650 Li-Ion Battery * 18650 Li-Ion Battery - can be any brand or type * Battery protection circuit - may need to source individually * SPDT Sliding Switch * Wiring cables and connectors * M3*16 countersunk screws (8) * M3*10 countersunk screw * M3 nut **Required Software** Unicorn runs custom software written by myself, available on my GitHub repository. **Printing & Assembly** Print all parts without supports for best results. Follow the layout and assembly guide in picture 3 to snap everything into place using M3*16 screws. One M3*10 screw with an inserted nut holds the side cover in place. Soldering is required for wiring, please refer to pictures 4, 5, and 6 for guidance. A .blend file is provided for modification purposes if needed.