PMSx003

Introduction

The Plantower PMSx003 modules are laser particle sensors. Particles are measured by blowing air through the enclosure. By measuring diffusion of the laser beam, the amount of particles is counted. Measurement information is transmitted over a serial interface.

Hardware

The following modules share the same interface:

• PMS3003

TBD

• PMS5003

• PMS7003

• PMSA003

TBD

Pins:

VCC   - 5V (for fan and internal logic)
GND   - Ground (Note that chassis is also ground)
RX/TX - 3V3 UART 9600 8N1
SET   - Standby function, when pulled down the module does not send information over serial and goes into a low power state.
RESET - Reset the module, similar to power-up, it takes ~30 seconds before data is received

Software

ESP Easy

The ESP Easy plugin uses the (default) active mode of the module. This means that the module transmits data over the UART automatically. The update frequency of data depends on the changes in measurement data. (i.e. when there are no changes, no data is transmitted).

When starting the plugin, the module is reset. The set pin is not used at this moment, but can be used in the future for interval measurements.

Input

This plugin requires no input.

Output

The output of the plugin consists of 3 values:

• PM1.0 - Concentration of particles 1ug/m3
• PM2.5 - Concentration of particles 2.5ug/m3
• PM10 - Concentration of particles 10ug/m3

References: PMS5003 english manual