Senba BS412 Smart Digital Human PIR Motion Sensor - IoT Security & Lighting Control

The Senba BS412 operates on a low voltage range of 2.2 to 3.7 volts DC. This makes it directly compatible with 3.3V microcontroller systems like ESP32 and Raspberry Pi, and suitable for battery-powered applications using two AA batteries or a single Li-ion cell.

The 'Digital Human' feature uses an integrated algorithm to analyze the PIR signal pattern. It is tuned to recognize the specific infrared signature and movement characteristics of humans, helping to filter out common false triggers from pets, small animals, or moving curtains, thereby increasing detection accuracy.

The BS412 provides a digital output signal (high/low). To interface with an Arduino, connect the sensor's VCC to 3.3V, GND to GND, and the output pin to any digital input pin. The pin will go high (or low, depending on configuration) when motion is detected, which your Arduino sketch can read and act upon.

The 2-second lock time is a built-in refractory period after a detection event. During this time, the sensor will not trigger again, which helps prevent signal oscillation and multiple rapid triggers from a single continuous motion, simplifying logic in your control system.

While it has a wide operating temperature range (-25°C to 85°C), the BS412 is primarily designed for indoor or sheltered outdoor use (e.g., under an eave). For full outdoor exposure, it requires a protective enclosure to shield it from direct rain, dust, and condensation, as its IP rating is not specified.