Generic MCU-30105 MAX30105 Optical Smoke & Particle Detection Module - I2C Interface

The module is designed for a nominal 5V DC supply. It is crucial to provide a stable 5V power source within a typical tolerance of ±5% to ensure proper operation of the integrated MAX30105 sensor and its internal signal conditioning circuitry. Exceeding this voltage may damage the sensitive optical components.

Communication is via the standard I2C (Inter-Integrated Circuit) protocol. You will need to connect the module's SDA and SCL pins to your microcontroller's corresponding I2C pins, along with power (5V) and ground. The sensor has a programmable I2C address, allowing you to read raw optical data and configure its LED pulse amplitude and timing via registers.

The MAX30105 IC measures the intensity of light reflected or scattered by particles in its optical chamber. While it is highly sensitive to particulate matter, distinguishing specific Particle types (like smoke vs. dust) typically requires additional algorithmic processing of the sensor's raw data stream. It is best used as a high-sensitivity particulate event detector.

The built-in ambient light suppression is critical for stable operation in variable lighting conditions. It actively cancels out the DC component of the signal caused by background room light, allowing the module to accurately detect the much smaller AC signal variations caused by passing particles. This significantly improves reliability and reduces false triggers.

The module is supplied with a separate header pin strip. You will need to solder the headers onto the PCB's through-holes to connect it to a breadboard or wiring harness. The dual M3 mounting holes allow you to securely fasten the board to an enclosure or chassis once the headers are installed.