1. There is an air circulating machine with dust filter at home, but no dust index shown. So I make one with arduino 101 to show the level of PM2.5 at home.
2. One LCD 1602 shield is prepared and plunged into the arduino 101. The pins of 4,5,6,7,8,9 shall be used for data and command , configured as
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
3. One smart dust sensor of PWM-01 shall be connected by pin D11 porting to LCD1602 panel, optical signal reflected by air dust can shown the numbers of dust in air. as follows,
4. The reading can be got from sensor and sent for LCD panel to shown