Ultimate DIY mmWave Presence Sensor! ESP32 + LD2450 for Smart Home Automation

DIY mmWave Presence Detector with ESP32 + LD2450 | Smart Home Automation Tutorial

#ad Thanks to PCBWay for sponsoring this project and helping bring my custom PCB design to life! 👉 https://www.pcbway.com

🔧 What You’ll Learn

✅ How to build your own mmWave presence detector
✅ How to integrate the LD2450 radar sensor with ESP32
✅ Real-time presence and position tracking in Home Assistant
✅ How to automate lighting, climate, and notifications based on presence

I demonstrate a few simple automations using notify to show how fast the response time is – but of course, you can use any action you like in your setup!

🧠 Resources & Links

* Updater Box Trays: https://makerworld.com/en/models/467976#profileId-377094
* HLK Radar Tool:
 📱 Google play store: https://play.google.com/store/apps/details?id=com.hlk.hlkradartool
🍎 Apple Store: https://apps.apple.com/us/app/hlkradartool/id1638651152
* Bin Files & Plotly Graph Code: https://www.patreon.com/posts/diy-mmwave-106417982
* ESP32: https://s.click.aliexpress.com/e/_DD91zi7
* LD2450 Sensor: https://s.click.aliexpress.com/e/_DB0L06n

Pins:
ESP32 HLK-LD2450
VIN 5v
TX2 RX
RX2 TX
GND GND

💡 Support My Work

Patreon: https://www.patreon.com/lickylauda
Paypal: https://paypal.me/lickylauda
Buy me a coffee: https://www.buymeacoffee.com/lickylauda

I’m always open to collaborations, reviews, or sponsorships — reach out via email if you’d like to work together!

💬 If you have any questions, feel free to ask in the comments.
👍 If you enjoy the project, please like, subscribe, or support me on Patreon to help me keep creating!


Chapters:
0:00 intro
0:10 sponsor
0:13 celebrate
0:21 let’s get started
1:05 test setup
1:35 install ESPHome firmware
1:53 add to home assistant
2:46 add plotly graph card
4:42 change orientation
4:57 design pcb
5:35 sponsor
5:50 review the pcb
6:25 printing the case
7:05 assembly time
9:14 zone setup
9:56 create automation (simple)
10:31 test automation
10:49 adjust the zones
11:16 create automation (more advanced)
15:11 test automation
15:28 patrons
15:36 credits