Quantity   Component name
1 × ESP8266-01 WiFi module
1 × Arduino Pro Mini 3.3V
1 × Melexis MLX90615 infra-red contact-less thermometer
1 × MCP1799 3.3 V LDO regulator (TO-92 package)
1 × RGB LED module
1 × Active piezo buzzer
1 × Green LED (WiFi connectivity indicator)
1 × Red LED (Power indicator)
1 × Li-ion charging board with protection
1 × 1200mAh Li-ion battery (from an old Nokia phone)
1 × 80mm diameter acrylic disc
1 × 4.7kW resistor (for voltage divider)
1 × 20kW resistor (for voltage divider)
4 × 220W resistors (for LEDs)
1 × USB hub cup warmer (for enclosure, on/off switch and charging ports)