Seeed Studio Studio MR60BHA2 60GHz mmWave Human Breathing & Heartbeat Sensor Module

The MR60BHA2 module requires a stable 5V DC power supply, capable of delivering at least 1A current. Power should be connected via the designated 5V and GND pins on the board. Avoid using voltages higher than 5.5V to prevent damage to the onboard ESP32C6 microcontroller and radar IC.

Primary communication is achieved via a UART (Serial) interface. You need to connect the module's TX and RX pins to your host microcontroller's corresponding RX and TX pins. The sensor outputs structured data packets containing detection status, breathing rate, and heart rate information over this serial link, following a defined protocol documented by Seeed Studio Studio.

Yes, the module comes with a pre-flashed ESPHome firmware on the integrated XIAO ESP32C6, enabling immediate Wi-Fi and Bluetooth connectivity. You can use ESPHome, Arduino IDE, or other ESP32-compatible frameworks to reprogram it for direct MQTT transmission, web server hosting, or Bluetooth Low Energy (BLE) data broadcasting, eliminating the need for an external host in many IoT applications.

For reliable breathing and heart rate detection, the subject should be within 0.4 to 1.5 meters from the sensor module, with a clear line of sight. The optimal distance is typically around 1 meter. For static human presence detection (motionless occupancy), the range extends up to approximately 6 meters, but vital sign accuracy decreases significantly beyond the 1.5m threshold.

Performance can be influenced by extreme material interference. The 60GHz signal can penetrate thin fabrics but is blocked by thick metals or conductive materials placed directly in front of the antenna. Strong RF interference in the 60GHz band should be minimized. The integrated algorithm is designed to filter out environmental noise, but performance is optimized for indoor, relatively stable environments.