Generic HS-S38A Human Body Sensor Module - PIR Motion Detector

The HS-S38A module is designed to operate within a 3.3V to 5V DC range. This dual-voltage compatibility makes it directly interfaceable with most common microcontrollers like Arduino (5V), Raspberry Pi (3.3V), ESP32, and STM32 boards without requiring level shifting.

The module uses a standard 3-pin PH2.0 connector. The pinout is VCC (power), GND (ground), and OUT (digital signal). Connect VCC to your microcontroller's 3.3V or 5V pin, GND to common ground, and the OUT pin to any digital input pin to read the high/low motion detection signal.

The HS-S38A provides a digital output signal. The output pin goes HIGH (logic 1) when motion is detected within the sensor's field of view and returns to LOW (logic 0) after a brief hold time once motion ceases. This signal can be read directly by a microcontroller's digital input.

No, the HS-S38A is a standard PCB module without any environmental sealing (IP rating). It is designed for indoor use in controlled environments. For outdoor applications, the module must be housed in a sealed, weatherproof enclosure that protects it from moisture, dust, and direct sunlight.

This specific module version does not feature user-adjustable sensitivity pots or range settings. Its detection pattern and sensitivity are fixed by the internal PIR sensor lens and circuit design. For adjustable parameters, you would need to select a different PIR sensor model that includes those features.