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Small green circuit board with white dome sensor and Grove connector

Seeed Studio

Seeed Studio Grove mini PIR motion sensor

SKU CH-9EKN-VCEYH

Compact PIR motion sensor with Grove interface, adjustable sensitivity and 20 mm footprint for Arduino and Raspberry Pi projects

  • TypeSensors
  • Compact 20 mm board fits tight enclosures
  • Adjustable sensitivity via solderable rheostat pin
  • Grove plug works with Arduino and Raspberry Pi
  • Low-power PIR detects motion up to 5 m
  • Best accuracy at 2 m range and 25 °C

Compact motion sensor for low-range detection

The Seeed Studio Grove mini PIR motion sensor is a passive infrared detector built for projects that need basic presence sensing within a short radius. Its 20mm by 20mm footprint and 12mm height allow it to sit inside tight enclosures where larger modules cannot fit. The sensor targets hobbyists and prototypers who want a ready-to-use motion trigger without designing analogue front-end circuitry.

Grove connector simplifies wiring to Arduino

A standard Grove socket carries power and signal, so the board plugs directly into a Grove shield or hat without jumper wires or breadboards. The interface works with both Arduino and Raspberry Pi platforms, freeing GPIO pins for other tasks while the sensor handles detection. A reserved pad on the rear accepts a slide rheostat, letting builders tune the trigger threshold by soldering a single component.

Steady output while a warm body remains in view

The detector holds its signal high for as long as infrared radiation from a moving person stays within the sensing zone, rather than pulsing briefly on each movement. Optimal reliability occurs at 25°C and at distances up to 2m, with a published maximum reach of 3m to 5m. Mounting orientation affects sensitivity, so the module should be positioned horizontally for consistent coverage.

Highlights

  • Compact 20 mm board fits tight enclosures
  • Adjustable sensitivity via solderable rheostat pin
  • Grove plug works with Arduino and Raspberry Pi
  • Low-power PIR detects motion up to 5 m
  • Best accuracy at 2 m range and 25 °C

Specifications

TypeSensors

Questions about this item

How long can the Grove mini PIR sensor run continuously before heat or power becomes a concern?

The sensor is described as low power consumption, so it can operate all day without significant heat build-up or power draw issues.

What hardware must I already have to connect and use this Grove mini PIR sensor?

You need a Grove-compatible shield or board for Arduino or Raspberry Pi, plus a slide rheostat if you want to adjust sensitivity via the reserved pin.

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