Pico Air WiFi Monitoring Expansion consists of an open-source portable sensor that has the ability to provide the level of quantity of the suspended particulates with their mass. Pico Air WiFi Monitoring Expansion works on operating voltage of 5V with a hi-tech Digital Laser Dust Sensor PMSA003, ESP8266 and Bosch BME280 with an on-board 0.91" OLED Display that provides the information of suspended particulate matter(PM1.0, PM2.5, PM10) in the air per unit volume via digital output . It communicates via UART(serial) with the standby current ≤200 Microampere(μA) of the sensor.