HC-SR501 Pyroelectric Infrared Motion (PIR) Sensor

• ~$1.50
• Physical adjustable controls for time delay and the sensitivity
• Operating voltage range: 4.5-20V
• Quiescent current: 50uA

ESP 8622

• ~$3.00
• 2 GPIO pins
• Wifi Connectivity
• 70mA current draw

FTDI Mini USB to TTL Serial Converter Adapter Module

• ~$4.00
• Only utilized to upload code and will not be included in the final design