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RoomSense IQ: The Ultimate Presence-Based Room Automation

April 25, 2023 by Sina Moshksar

RoomSense IQ is the ultimate presence-based automation solution for DIY smart home enthusiasts who strive to achieve the perfect balance of comfort, energy efficiency, and security. Our state-of-the-art room monitoring device employs cutting-edge mmWave radar technology and PIR sensors to accurately detect and measure the movement of individuals.


With RoomSense IQ, inefficiency in homes is no longer a problem, and occupants can enjoy a superior experience. Traditional building automation systems typically rely on schedules to regulate HVAC and lighting systems, resulting in wasted energy and high costs when rooms are unoccupied or underutilized. However, with RoomSense, you can detect when a room is empty and adjust temperature, humidity, and lighting levels accordingly. This not only enhances your home's energy efficiency, but it also does so in a delightful and effortless manner, benefitting everyone involved.

MagFlex is RoomSense IQ's mounting system that utilizes a magnetic joint to achieve accurate sensor alignment without the need for any mechanical interface. This innovative solution allows the device to be positioned with precise angular and radial alignment relative to the mount, making it an ideal solution for accommodating various room shapes and sizes.

Efficient and Delightful Home Automation

RoomSense IQ with MagFlex


  • mmWave Radar 24GHz with sensing distance is up to 5 meters and 120° FOV
  • PIR sensor to filter out non-human activities and reduce false alarms
  • Distance to target measurement and Macro/ Micro Energy levels in 8 distance bins for Proximity-Based Control
  • Built-in temperature, humidity and light sensors for climate control 
  • Magnetic joint holder
  •  ESP32S3 MCU with Wi-Fi connectivity
  •  RGB LED for Wi-Fi status indicator
  •  USB-C for power and serial communication
  •  Open-source Home Assistant dashboard codes with integration via MQTT protocol
  • 25Hz refresh rate on critical values such as macro and micro energy levels on HA
  •  Auto discovery capability for easy integration with HA
  • Rapid refresh rate for energy level plotting, ensuring real-time data updates.
  • Customizable energy threshold for each bin
  • Occupancy status based on user-defined settings
  • Trend display of temperature, humidity, and light
  • Accessible enclosure design for 3D printing
  • Board dimension: 5.5cm x 5.5cm (2.1" x 2.1")
  • Power Consumption 150mA at 5V


RoomSense IQ was created by Sina and his long-time colleague Greg, both of whom share a strong passion for home automation and DIY electronics. They aspired to create a tool that could turn their vision of an ideal smart home into a reality. Their combined expertise and experience have made RoomSense IQ a prominent contender in the industry.

RoomSense IQ is designed for smart home automation and security applications. The device uses a mmWave Radar with a sensing distance of up to 5 meters and a 120-degree field of view. This allows the device to accurately detect movement and occupancy within a room or an area.

The device provides an occupancy status physical signal, which can be used to trigger automations or alerts based on whether a room is occupied or not. Additionally, the device provides distance to target measurement, which can be configured to trigger certain actions based on the user's proximity to certain areas of the room.

To reduce false alarms, the device also includes a PIR sensor, which is designed to filter out non-human activities. This means that the device can distinguish between human and non-human movement and only trigger alerts or automations when necessary.

It includes built-in temperature, humidity, and light sensors, which can be used for climate control or other applications. Additionally, the device also includes an RGB LED for WiFi status indication, which makes it easy to see whether the device is connected to the network and working properly.


  • LD2410 Module is a human presence status sensing module that operates at a high sensitivity of 24GHz. It works by utilizing the FMCW (frequency-modulated continuous wave) principle.
  • muRata PIR sensor  is selected for it's super reliability, excellent detection distance and high sensitivity.
  • The SHT30 is a digital sensor that is highly precise in measuring temperature and humidity. It is recognized for its exceptional accuracy, with a ±0.3°C precision for temperature and ±2% precision for relative humidity. Note that the temperature sensor may be affected by heat generated from other components on the same PCB, but we have isolated the SHTC3 and added a thermal cut-out to mitigate any interference.
  • The ESP32-S3 offers WiFi connectivity, which has a broader range compared to Bluetooth and can provide coverage throughout your entire home.
  • The Adafruit A161 photocell is a small, inexpensive sensor that can detect ambient light levels. The sensor provides raw values. Further calibration needed to convert the values into real Lux equivalent. 

In summary, RoomSense IQ is a powerful and presence-based platform for smart home automation and security. Its built-in mmWave Radar sensor, PIR sensor, and other sensors make it highly accurate and adaptable for various applications. Additionally, its open-source dashboard and WiFi connectivity enable seamless integration with a wider smart home ecosystem. With its customizable and flexible monitoring capabilities, The system can automatically manage home environments to meet specific energy-saving needs and enhance comfort levels in an enjoyable way.

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