Beginner DIY ESPHome mmWave Presence Sensor

Prerequisites
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Using the affiliate links below helps support the channel and all the content I create 🎉🙌

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

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

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