Quantity   Component name
1 × ESP8266 NodeMCU WiFi Microcontroller https://www.amazon.com/dp/B010O1G1ES
1 × HC-SR04 Ultrasonic Distance Sensor https://www.amazon.com/dp/B01COSN7O6
1 × 5V USB Transformer + MicroUSB Cable Use the one you have with the highest current output
4 × F2F Wires
1 × 3.3V Fan Optional