Datasheet PM2105L (Cubic) - 5

Internal Architecture Description
When the fan works, it wil generate airflow. When the particles in the sampled gas pass through the beam of the light source (laser), a light scattering phenomenon occurs, and the scattered light is converted into an electrical signal (ie, a pulse) by the photoelectric transformer. The larger the particle size, the larger the amplitude of the pulse signal outputs. The number of particles of different sizes is calculated by comparing the peak value with the predetermined threshold value, and the mass concentration value is obtained by a professional algorithm. By testing the intensity of the scattered light, real-time test data is obtained. www.en.gassensor.com.cn 4/19 Document Outline Description Features Working Principle Specifications Dimensions and Connector 1.Dimensions (Unit mm, tolerance ±0.2 mm) Typical Application Circuit Case 1.UART3.3V Application Product Installation User Attention UART Communication Protocol 1. General Statement 2.Format of Serial Communication Protocol 3.Command Table of Serial Protocol Note: Example: 4.3 Set up and Read Particle Calibrated Coefficien Note: Description: 4.4 Close/Open Laser Diode Note: Note: Example: Note: Example: I²C Communication Protocol 1. Brief Introduction 2. Communication Common Description 3. Protocol Detailed Description 3.1Send Command Data 3.2Read Command Data Packing Information