HPMA115S0 HONEYWELL Capteur: particules Ualim 5VDC Amplitude: 0-1000ug/m3 -10÷50°C

Wiring of the sensor requires only four pins:

• Pin 2 (Vcc) goes to the 5V pin on the Arduino board.
• Pin 6 (UART TX) goes to the RX pin of the Arduino board. This pin uses 3.3V logic level.
• Pin 7 (UART RX) goes to the TX pin of the Arduino board. This pin uses 3.3V logic level.
• PIN 8 (GND) goes to GND pin of the Arduino Board.

Pin 1 (3.3V output) is left unused. The wire is not connected, as the Arduino board provides its own 3.3V power supply.