Radar Click is a compact add-on board that uses short-wavelength electromagnetic waves, which objects in their path reflect, providing information on these objects' range, velocity, and angle. This board features the MM5D91-00, a presence detection sensor module that integrates 60GHz mmWave technology that counts the number of people entering or exiting an entrance from Jorjin Technologies Inc. It includes the ARM Cortex-M4F based processor system, 1Tx, 3Rx antenna, and integrated regulator, alongside azimuth and elevation field of view of ±45° and ±40°. Its detection goes up to 10m for macro and 5m for micro motion with environmental-factors immunity such as temperature, wind, sunlight, and dust. This Click board™ is suitable for various presence sensing applications, from office and home to commercial buildings and more.

Radar Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

Radar Click as its foundation uses the MM5D91-00, a presence detection sensor module with an integrated mmWave technology from Jorjin Technologies Inc. It counts the number of people entering or exiting an entrance, simplifies the implementation of mmWave sensors in the band of 61.0 to 61.5GHz, and includes the ARM Cortex-M4F-based processor system 1Tx 3Rx antenna and onboard regulator. This Click board™ is built to demonstrate the function of the entrance counter of the 60GHz radar sensor with its sophisticated radar presence detection algorithms.

Characterized by low power consumption and high resolution, this board represents a suitable solution for various presence sensing applications, from office and home to commercial buildings and more. Its detection range goes up to 10m for macro motion, representing human movements, and 5m for micro motion, which stands for stationary human (normal breathing and blinking eyes) in sitting or standing positions with no active signs for at least 30 seconds. Immune to environmental factors such as temperature, wind, sunlight, and dust/debris, the MM5D91-00 also comes with azimuth and elevation field of view of ±45° and ±40°.

The MM5D91-00 communicates with MCU using the UART interface with the default baud rate of 115200bps for the data transfer. In addition, it also uses several mikroBUS™ pins. An active-low reset signal routed on the RST pin of the mikroBUS™ socket activates a hardware reset of the radar module. It also has three general-purpose pins, routed to the AN, PWM, and INT pins of the mikroBUS™ socket marked as GP2, GP1, and GP0 to signal an essential change in device status, alongside its green, red, and blue LED indicators. Green LED stands for active presence indication, while red LED represents non-presence indication. Blue LED serves for bootloader mode indication.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library that contains easy-to-use functions and an example code that can be used, as a reference, for further development.

• Interface: UART
• Compatibility: mikroBUS™
• Dimensions: 57.15 x 25.4mm
• Input Voltage: 3.3V or 5V
• Frequency Range: Min. 61 GHz, Max. 61.5 GHz
• E-Plane: Min. 25 Deg, Typ. 40 Deg, Max. 55 Deg
• H-Plane: Min. 30 Deg, Typ. 45 Deg, Max. 60 Deg
• Operating Temperature Range: Min. -10°C, Typ. +25°C, Max. +70°C

• Schematic
• MM5D91-00 Datasheet
• mikroSDK
• GitHub