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Occupancy and Air Sensor

Detect movement and room conditions and connect over WiFi with a passive IR occupancy sensor, barometer, temperature and humidity sensors, and the Microchip ATSAMW25 module. Prototype quickly with RoomSense and MyDevices Cayenne.

RoomSense WiFi

RoomSense Occupancy and Air Sensor

Use sensor data to control your home with the RoomSense passive-IR board. Plug it in to any powered USB port and deliver occupancy, temperature, humidity and barometric pressure to your home automation system.

This tiny USB dongle uses a passive IR motion detector, and temperature, humidity and barometric sensors to monitor a room's conditions and occupancy. The Microchip ATSAMW25 provides a SAMD21 Cortex-M0+ MCU and WiFi connectivity. It integrates easily with cloud IoT platforms such as MyDevices Cayenne.


Pre-flashed with the Arduino bootloader, the RoomSense is easily deployable as a home automation device by developers of all skill levels.


  • ARM Cortex-M0+ MCU at 48 MHz
  • 802.11b/g/n WiFi
  • Barometer, humidity and temperature sensors
  • Passive IR motion detector
  • Powered over USB

Customize Your Board

Customize the RoomSense to your project's specific needs in Geppetto D2O. Add sensors or remove unused components with the ease of a drag-and-drop interface.

Related Posts

Learn more about this product by checking out the following:

Articles from Gumstix blog:

Press Release

Included Components
Occupancy and Air Sensor

Occupancy and Air Sensor


Barometric pressure sensor

Flash Memory (NAND)

256 KB


5V from USB standard A plug


ARM Cortex-M0+




Temperature and Humidity Sensor



Infrared Sensor

Passive IR motion detector

Key Components
Digital Temperature Sensor

SI7021 Temperature Sensor IC, Digital, 0.4 C, -40 C, 85 C, DFN, 6

Passive Infrared (PIR) Detector Controller

NCS36000 Series 5.75 V Passive Infrared (PIR) Detector Controller - SOIC-14

Microchip ATSAMW25 SmartConnect

SmartConnect ATWINC1500B-MU-T Module - SmartConnect ATWINC1500B-MU-T Module/ MODULE (R6)

MS5611 Barometric Sensor

A high resolution altitude and digital atmospheric pressure sensor accurate to within 10 cm.

PIR Fresnel Lens

PIR Fresnel Lens

Mating Connectors

Please read the instructions in the README file carefully before starting. Instructions and functions are explained in the file.

Files that are needed (such as bootloader and operating system) to create a bootable disk image, are available below.

Our Support page links additional resources.

Software Version:

Gumstix operating capacity is being affected by COVID-19 restrictions. Longer lead times may be experienced. Please contact us by chat or mail with questions.