RAK12039 WisBlock Particle Matter Sensor Module Datasheet

Overview

Description

The RAK12039 is a Particle Matter Sensor module that is part of the RAKWireless WisBlock Sensor series. It is based on PMSA003I digital particle concentration sensor, which obtains the number of suspended particles in the air. It is interfaced via I2C bus and allows you to capture standard PM1.0, PM2.5, and PM10 values, as well as, a number of particles in micrometer on a 0.1 L particle standard volume.

Features

• Minimum distinguishable particle diameter: 0.3 micrometer
• Particle range of measurement:
  • 0.3~1.0 Micrometer（μm)
  • 1.0~2.5 Micrometer（μm)
  • 2.5~10 Micrometer（μm)
• I2C Interface
• Power supply voltage：5.0 V (on-board boost converter)
• Interface voltage: 3.3 V
• Active current: < 100 mA
• Standby current: < 200 uA
• Operating temperature: -10° C ~ 60° C
• Storage temperature: -40° C ~ 80° C
• Module size: 25 x 15 mm
• Particle Matter PMSA003I size: 38 x 35 x 12 mm

Specifications

Overview

Figure 1: RAK12039 WisBlock Particle Matter Sensor Module - Top View

Figure 1: RAK12039 WisBlock Particle Matter Sensor Module - Bottom View

Mounting

The RAK12039 WisBlock Particle Matter Sensor Module can be mounted to the IO slot of the WisBlock Base board. Figure 3 shows the mounting mechanism of the RAK12039 on a WisBlock Base module.

Figure 1: RAK12039 WisBlock Particle Matter Sensor mounting

Hardware

The hardware specification is categorized into five (5) parts. It shows the chipset of the module and discusses the pinouts and their corresponding functions and diagrams. It also covers the electrical and mechanical characteristics that include the tabular data of the functionalities and standard values of the RAK12039 WisBlock Particle Matter Sensor Module.

Chipset

Vendor	Part Number
Plantower	PMSA003I

Pin Definition

The RAK12039 WisBlock Particle Matter Sensor Module comprises a standard 40-pin WisConnector. The WisConnector allows the RAK12039 module to be mounted to a WisBlock Base Board. The pin order of the connector and the pinout definition is shown in Figure 4.

NOTE

VBAT, 3V3_S, GND, I2C pins, RESET, and SET are connected to 40-pin WisConnector.

Figure 1: RAK12039 WisBlock Particle Matter Sensor pinout

Electrical Characteristics

Recommended Operating Conditions

Symbol	Description	Min.	Nom.	Max.	Unit
3V3_S	Supply voltage to on-board boost converter	2.2	3.3	-	V
VCC	PMSA003I Supply voltage	4.5	5.0	5.5	V
I2C Voltage Rail	Supply voltage	-	3.3	-	V

Mechanical Characteristics

Board Dimensions

Figure 5 shows the dimensions and the mechanic drawing of the RAK12039 module.

Figure 1: RAK12039 WisBlock Particle Matter Sensor Module mechanic drawing

WisConnector PCB Layout

Figure 1: WisConnector PCB footprint and recommendations

Schematic Diagram

The I2C address of RAK12039 is 0x12. R10 and R11 do not need to be mounted on the RAK12039 due to the pull-up resistors already on the WisBlock Base board.

Figure 1: RAK12039 schematic diagram

PMSA003I Installation Notes

1. Metal shell is connected to the GND, so be careful not to let it get shorted with the other parts of the circuit.
2. The best way of installation is to make the plane of the inlet and outlet close to the plane of the host. Or some shield should be placed between the inlet and outlet to prevent the airflow from the inner loop.
3. The blowhole in the shell of the host should not be smaller than the inlet.
4. The sensor should not be installed in the airflow way of the air cleaner or should be shielded by some structure.
5. When the sensor is used for outdoor fixed equipment, the equipment should be completed with protection from the sandstorm, rain, snow, etc.
6. The two screw holes can be used for positioning and fixing. For fixing holes, the screw depth can reach 3.4 mm, and the other should not exceed 1.9 mm.