Elements pinout list

Wemos D1 mini

Wemos PIN	Function	Remarks
5V	5V supply
G	Ground (-)
D4	Heater on	Connected to MOSFET gate
D3	DS18B20 data
D2	I2C SCL line
D1	I2C SDA line
RX	Not used
TX	Not used
3V3	3V supply
D8	PMS RST pin
D7	PMS TXD pin
D6	PMS RXD pin
D5	PMS SET pin
D0	DHTxx data pin
A0	Not used
RST	Not used

PMS3003 pinout

Connector pins

Front view of socket when air input fan is on top right.

----|
| *   - NC
| *   - NC
| *   - RST
| *   - TXD
| *   - RXD
| *   - SET
| *   - GND
| *   - 5VCC
----|

Pinout description

PMS PIN	Color	Function
NC	red	Not used
NC	black	Not used
RST	yelow	PMS reset (5V)
TXD	green	Serial TX
RXD	blue	Serial RX
SET	white	PMS set (5V)
GND	orange	Ground
5VCC	violet	5V supply