Beginner DIY ESPHome mmWave Presence Sensor

Prerequisites
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ESP32 30 PIN Development Board
- Amazon: (3 pack)
- Aliexpress: (USB C / Micro USB)
HLK-LD2450 mmWave Radar Sensor
- Amazon: (HLK-LD2450 Kit)
- Aliexpress: (HLK-LD2450 Kit)
  - Option 1
  - Option 2

Optional

Dupont Cable
- Amazon: (Dupont Cable Female to female)
- Aliexpress: (Dupont Cable Female to female)
USB C Cable
- Amazon: (2 Pack)
- Aliexpress: (USB C Cable)
5v charger
- Amazon: (2 Pack)
- Aliexpress: (5v charger)

HLK-LD2450 Sensor Specs
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Frequency: 24 GHz (ISM band)
Sensor Type: Millimeter wave radar
Detection Range: Up to 6 meters (approximately 8 meters in practical terms)
Module Size: Ultra-small, measuring 15mm x 44mm
Detection Angle: ±60°
Pitch Angle: ±35°

Additionally, the HLK-LD2450 sensor supports the following features:

Precise motion target localization and tracking: Distance, angle and speed.
Configurable Zones: It allows you to define up to 3 configurable zones for monitoring.
Multiple Connection Options: You can connect it using pin and socket interfaces.
Intelligent Algorithm Firmware: Utilizes FMCW waveforms and advanced signal processing technology.

fixtSE DIY Sensor Case
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I'll keep adding more sensors to this case, so you can use it for other projects as well.

You can get it on:

Or order it from:

Save $5 on your first order using our link: https://pcbway.com/g/lHR6if

How to wire it up
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ESP32 Board	HLK-LD2450
VIN	5v
TX2	RX
RX2	TX
GND	GND

ESPHome Firmware
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Updated firmware to ESPHome 2024.12.4
Added OTA support

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The only difference between the two firmwares is the Bluetooth Proxy. If you don't need it, you can use the firmware without it.
You can find the documentation here

YAML Files
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v1.2.0:
Added OTA support (deactivated by default)

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YAML

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How to create zones
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HLKRadarTool
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How to use it on your dashboard
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Plotly Graph
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By dbuezas

Just replace mmwave_sensor with your sensor's name. Ej: mmwave_sensor_aac3 or mmwave_sensor_no_aac3 based on the firmware you flashed.

Firmware	Sensor Name
With Bluetooth Proxy	mmwave_sensor
Without Bluetooth Proxy	mmwave_sensor_no

Custom Card

type: custom:plotly-graph
title: mmWave Radar Sensor
refresh_interval: 1
hours_to_show: current_day
layout:
  height: 230
  margin:
    l: 50
    r: 20
    t: 20
    b: 40
  showlegend: true
  xaxis:
    dtick: 100
    gridcolor: RGBA(200,200,200,0.15)
    zerolinecolor: RGBA(200,200,200,0.15)
    type: number
    fixedrange: true
    range:
      - 400
      - -400
  yaxis:
    dtick: 100
    gridcolor: RGBA(200,200,200,0.15)
    zerolinecolor: RGBA(200,200,200,0.15)
    scaleanchor: x
    scaleratio: 1
    fixedrange: true
    range:
      - 600
      - 0
entities:
  - entity: ''
    name: Target1
    marker:
      size: 12
    line:
      shape: spline
      width: 5
    x:
      - $ex hass.states["sensor.mmwave_sensor_target_1_x"].state /-10
    'y':
      - $ex hass.states["sensor.mmwave_sensor_target_1_y"].state /10
  - entity: ''
    name: Target2
    marker:
      size: 12
    line:
      shape: spline
      width: 5
    x:
      - $ex hass.states["sensor.mmwave_sensor_target_2_x"].state /-10
    'y':
      - $ex hass.states["sensor.mmwave_sensor_target_2_y"].state /10
  - entity: ''
    name: Target3
    marker:
      size: 12
    line:
      shape: spline
      width: 5
    x:
      - $ex hass.states["sensor.mmwave_sensor_target_3_x"].state /-10
    'y':
      - $ex hass.states["sensor.mmwave_sensor_target_3_y"].state /10
  - entity: ''
    name: Zone1
    mode: lines
    fill: toself
    fillcolor: RGBA(20,200,0,0.1)
    line:
      color: RGBA(20,200,0,0.2)
      shape: line
      width: 2
    x:
      - $ex hass.states["number.mmwave_sensor_zone_1_x1"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_1_x1"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_1_x2"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_1_x2"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_1_x1"].state /-10
    'y':
      - $ex hass.states["number.mmwave_sensor_zone_1_y1"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_1_y2"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_1_y2"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_1_y1"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_1_y1"].state /10
  - entity: ''
    name: Zone2
    mode: lines
    fill: toself
    fillcolor: RGBA(200,0,255,0.1)
    line:
      color: RGBA(200,0,255,0.2)
      shape: line
      width: 2
    x:
      - $ex hass.states["number.mmwave_sensor_zone_2_x1"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_2_x1"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_2_x2"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_2_x2"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_2_x1"].state /-10
    'y':
      - $ex hass.states["number.mmwave_sensor_zone_2_y1"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_2_y2"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_2_y2"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_2_y1"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_2_y1"].state /10
  - entity: ''
    name: Zone3
    mode: lines
    fill: toself
    fillcolor: RGBA(200,120,55,0.1)
    line:
      color: RGBA(200,120,55,0.2)
      shape: line
      width: 2
    x:
      - $ex hass.states["number.mmwave_sensor_zone_3_x1"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_3_x1"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_3_x2"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_3_x2"].state /-10
      - $ex hass.states["number.mmwave_sensor_zone_3_x1"].state /-10
    'y':
      - $ex hass.states["number.mmwave_sensor_zone_3_y1"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_3_y2"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_3_y2"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_3_y1"].state /10
      - $ex hass.states["number.mmwave_sensor_zone_3_y1"].state /10
  - entity: ''
    name: Coverage
    mode: lines
    fill: tonexty
    fillcolor: rgba(168, 216, 234, 0.15)
    line:
      shape: line
      width: 1
      dash: dot
    x:
      - 0
      - $ex 600 * Math.sin((2 * Math.PI)/360 * 60)
      - 450
      - 400
      - 300
      - 200
      - 100
      - 0
      - -100
      - -200
      - -300
      - -400
      - -450
      - $ex -600 * Math.sin((2 * Math.PI)/360 * 60)
      - 0
    'y':
      - 0
      - $ex 600 * Math.cos((2 * Math.PI)/360 * 60)
      - $ex Math.sqrt( 600**2 - 450**2 )
      - $ex Math.sqrt( 600**2 - 400**2 )
      - $ex Math.sqrt( 600**2 - 300**2 )
      - $ex Math.sqrt( 600**2 - 200**2 )
      - $ex Math.sqrt( 600**2 - 100**2 )
      - 600
      - $ex Math.sqrt( 600**2 - 100**2 )
      - $ex Math.sqrt( 600**2 - 200**2 )
      - $ex Math.sqrt( 600**2 - 300**2 )
      - $ex Math.sqrt( 600**2 - 400**2 )
      - $ex Math.sqrt( 600**2 - 450**2 )
      - $ex 600 * Math.cos((2 * Math.PI)/360 * 60)
      - 0
raw_plotly_config: true

How to automate with it
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💡𐂷 Sensor Light

By Blacky
Documentation here