Air Quality Meters PMS7003. PM2.5 Sensor Module Built-in Fan. NodeMCU 11b/g/n) and Bluetooth (Classic and

11b/g/n) and Bluetooth (Classic and LE)

Fully backward-compatible 40-pin GPIO header

It's not a finished product of OBDII diagnostic scanner

microSD card slot (high-speed SDR104 mode)

This is  DC regulated power converter module with long life

Air Quality Meters PMS7003. PM2.5 Sensor Module Built-in Fan. NodeMCU 11b/g/n) and Bluetooth (Classic andPrinciple: this sensor uses the principle of La Ser scattering, i. e. the La Ser is irradiated to suspended particles in the air to create scattering, and at the same time the scattered light is collected at a certain angle to maintain the curve of the scattered light over time. The microprocessor uses an algorithm based on the MIE theories to obtain the equivalent particle size of the particles and the number of particles of different sizes per unit