Detect motion with a DFRobot SEN0192 — a 10.525 GHz microwave Doppler sensor (PC_ENABLE_SEN0192). It's a 3-pin part (V / G / digital OUT) whose OUT line asserts while it senses movement within its adjustable range. Unlike a PIR it works through thin non-metal enclosures and is unaffected by ambient light or temperature.

The sensor has no protocol — just one digital line — so services/sen0192 tracks it as a debounced presence signal: presence asserts on motion and is held for PC_SEN0192_HOLD_MS after the last motion sample, so brief gaps between Doppler returns don't make presence flap. The presence state machine is pure and host-tested (native_sen0192); only the GPIO read touches hardware.

This sketch lights the onboard LED while motion is present and prints each detection over Serial.

Wiring

SEN0192	ESP32
OUT	GPIO `PC_SEN0192_PIN` (4)
VCC	5V
GND	GND

The input pin, hold time, and OUT polarity are ServerConfig knobs, so a driver's pin assignment lives in one place — override them with build flags, no code change:

PC_SEN0192_PIN (default 4) — the GPIO the OUT line is on
PC_SEN0192_HOLD_MS (default 2000) — how long presence is held after the last motion
PC_SEN0192_ACTIVE_HIGH (default 1) — set 0 if your module's OUT idles high and drops on motion

Build and flash

Enable the feature for the whole build (already in build_opt.h for the Arduino IDE). With PlatformIO:

pio ci examples/Drivers/Sen0192 --board esp32dev --lib "." \

--project-option="build_flags=-DPC_ENABLE_SEN0192=1"

Flash, open Serial @ 115200, and walk in front of the sensor:

SEN0192 microwave motion ready on GPIO4 - walk in front of it
[motion] DETECTED  (event #1)
[motion] clear
[motion] DETECTED  (event #2)

Adjust the module's range with its onboard potentiometer (MIN shortens, MAX lengthens, 2–16 m).