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mmWave for XIAO to Home Assistant via Bluetooth

Introduction​

24GHz mmWave Sensor for XIAO - Human Static Presence is a expansion board for Seeed Studio XIAO series. It is an antenna-integrated, high-sensitivity mmwave sensor that is based on the FMCW principle. Combined with sensor signal processing and accurate human body sensing algorithms, it can identify human bodies in motion and stationary states.

This chapter primarily introduces how the 24GHz mmWave Sensor for XIAO connects to the HA via Bluetooth. For detailed functional features of the 24GHz mmWave Sensor for XIAO, you can refer to here.

caution

All contents of this Wiki apply only to 24GHz mmWave for XIAO and may not be used on other millimetre wave sensors.

Getting Started​

Hardware Preparations​

In this article, we will use mmWave for XIAO in conjunction with the XIAO ESP32C3 to plug it into Home Assistant for the sake of aesthetics and ease of wiring. if you want to follow this tutorial to the letter, then you will need to prepare the following modules.

Seeed Studio XIAO ESP32C324GHz mmWave for XIAO
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The sensor is designed for XIAO compatibility, so in general, if you want to use this sensor, you need to prepare an XIAO and install the female header row pin for the sensor. When connecting to the XIAO, please pay special attention to the installation direction of the sensor, please do not plug it in backwards, otherwise it is likely to burn the sensor or the XIAO.

caution

The correct direction to follow is that the antenna of the sensor should face outwards.

After confirming that the connection direction is correct, you can connect the USB-C type cable to the computer or 3.3V power supply, and the sensor will start to work.

tip

If you don't have an XIAO on hand at the moment, then you have the option of powering the mmwave for XIAO separately by connecting TTL to its 3.3V pin and GND pin, which can also be done using the content of this tutorial. For this tutorial, there is no need to use the RX and TX pins.

Software Preparations​

If you haven't installed HomeAssistant yet, you can refer to the official HomeAssistant tutorial by clicking here.

Procedures​

Step 1. Discovery Device​

In Home Assistant, click the setting in the lower left corner, select Devices&Services in the center.

In the Discovered zone, there will be a sensor icon, click configure.

A popup window will appear, click submit.

You will see a successful configuration popup, click finish.

Step 2. Configurate Device​

In the configured zone, click ld2410_ble.

Once you are in the sensor settings page, click 1 device.

Add the sensor's return value to the dashboard.

Select ADD TO DASHBOARD in the popup window.

Finally, click overview in the upper left corner, you will see the mmwave-for-xiao sensor data successfully displayed on the dashboard. So far the mmwave for xiao sensor has been successfully connected to the Home Assistant.

Next, you can get creative with your automation!

mmWave for XIAO to Home Assistant via Wifi using ESPHome

The following yaml file connects a Seeed XIAO ESP32S3 Sense with Radar module to Home Assistant, using the ESPHome firmware:

# Configuration for ESPHome
esphome:
  # Name of the ESP32-S3 device
  name: "seeed-xiao-esp32s3-cam"
  
  # PlatformIO build options
  platformio_options:
    build_flags: -DBOARD_HAS_PSRAM
    board_build.arduino.memory_type: qio_opi
    board_build.f_flash: 80000000L
    board_build.flash_mode: qio 

# Configuration for ESP32 board
esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API - use your api and password
api:
  encryption:
    key: ""

ota:
  - platform: esphome
    password: ""

# Wi-Fi configuration - fill with your data
wifi:
  ssid: ""
  password: ""

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Xiao-Esp32s3 Fallback Hotspot"
    password: ""

# Captive portal configuration
captive_portal:

# Configuration for the ESP32 Camera
esp32_camera:
  id: espcam
  name: Xiao Cam
  external_clock:
    pin: GPIO10
    frequency: 20MHz
  i2c_pins:
    sda: GPIO40
    scl: GPIO39
  data_pins: [GPIO15, GPIO17, GPIO18, GPIO16, GPIO14, GPIO12, GPIO11, GPIO48]
  vsync_pin: GPIO38
  href_pin: GPIO47
  pixel_clock_pin: GPIO13
  resolution: 800x600
  
# Configuration for the ESP32 Camera Web Server
esp32_camera_web_server:
  - port: 8080
    mode: stream
  - port: 8081
    mode: snapshot

# Configuration for the 24GHz mmwave XIAO Radar
ld2410:
  id: ld2410_radar
  
uart:
  tx_pin: GPIO4
  rx_pin: GPIO3
  baud_rate: 256000
  parity: NONE
  stop_bits: 1

number:
  - platform: ld2410
    timeout:
      name: Radar Timeout
    max_move_distance_gate:
      name: Radar Max Move Distance
    max_still_distance_gate:
      name: Radar Max Still Distance
    g0:
      move_threshold:
        name: g0 move threshold
      still_threshold:
        name: g0 still threshold
    g1:
      move_threshold:
        name: g1 move threshold
      still_threshold:
        name: g1 still threshold
    g2:
      move_threshold:
        name: g2 move threshold
      still_threshold:
        name: g2 still threshold
    g3:
      move_threshold:
        name: g3 move threshold
      still_threshold:
        name: g3 still threshold
    g4:
      move_threshold:
        name: g4 move threshold
      still_threshold:
        name: g4 still threshold
    g5:
      move_threshold:
        name: g5 move threshold
      still_threshold:
        name: g5 still threshold
    g6:
      move_threshold:
        name: g6 move threshold
      still_threshold:
        name: g6 still threshold
    g7:
      move_threshold:
        name: g7 move threshold
      still_threshold:
        name: g7 still threshold
    g8:
      move_threshold:
        name: g8 move threshold
      still_threshold:
        name: g8 still threshold

binary_sensor:
  - platform: ld2410
    has_target:
      name: Radar Target
      id: radar_has_target
    has_moving_target:
      name: Radar Moving Target
    has_still_target:
      name: Radar Still Target

sensor:
  - platform: ld2410
    moving_distance:
      name: Radar Moving Distance
      id: moving_distance
    still_distance:
      name: Radar Still Distance
      id: still_distance
    moving_energy:
      name: Radar Move Energy
    still_energy:
      name: Radar Still Energy
    detection_distance:
      name: Radar Detection Distance
      id: radar_detection_distance
    g0:
      move_energy:
        name: g0 move energy
      still_energy:
        name: g0 still energy
    g1:
      move_energy:
        name: g1 move energy
      still_energy:
        name: g1 still energy
    g2:
      move_energy:
        name: g2 move energy
      still_energy:
        name: g2 still energy
    g3:
      move_energy:
        name: g3 move energy
      still_energy:
        name: g3 still energy
    g4:
      move_energy:
        name: g4 move energy
      still_energy:
        name: g4 still energy
    g5:
      move_energy:
        name: g5 move energy
      still_energy:
        name: g5 still energy
    g6:
      move_energy:
        name: g6 move energy
      still_energy:
        name: g6 still energy
    g7:
      move_energy:
        name: g7 move energy
      still_energy:
        name: g7 still energy
    g8:
      move_energy:
        name: g8 move energy
      still_energy:
        name: g8 still energy

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