Ultimate ESPHome DIY Smart Sensor | HLK-LD2450 ESPHOME

Published at : 18 Dec 2025

In this tutorial, we take our Beginner ESPHome Sensor to the next level 🌟, by adding a Light, Temperature, Humidity, and Pressure Sensor 🌞🌡️💧

FixtSE Web: https://fixtse.com/blog/ultimate-esphome-sensor

PCBWay Project: https://www.pcbway.com/project/shareproject/Easy_ESPHome_HLK_LD2450_mmWave_Sensor_Setup_without_Soldering_f6012977.html

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

Affiliate Links:
ESP32 30 PIN Development Board
- Amazon: (3 pack) https://amzn.to/3V4J5Q2
- Aliexpress: (USB C / Micro USB) https://s.click.aliexpress.com/e/_DBI6JUH
HLK-LD2450 mmWave Radar Sensor
- Amazon: (HLK-LD2450 Kit) https://amzn.to/4c9Oawp
- Aliexpress: (HLK-LD2450 Kit): https://s.click.aliexpress.com/e/_Dnl1OJf
https://s.click.aliexpress.com/e/_DdPanCz

- BH1750 Light Sensor
- Amazon: (3 pack) https://amzn.to/3PyLRcE
(6 pack) https://amzn.to/3PxyLwh
- Aliexpress: https://s.click.aliexpress.com/e/_DmpQSSh
- AHT20 BMP280 Temperature Humidity and Pressure Sensor
- Amazon: (5 pack) https://amzn.to/3TMdRwa
(Individual) https://amzn.to/4adEijE
- Aliexpress: https://s.click.aliexpress.com/e/_DdQiXGp
- Dupont Cable
- Amazon: https://amzn.to/49VSQEr
- Aliexpress: https://s.click.aliexpress.com/e/_Ddv5mrB
- Termoretractil Heat shrink tube
- Amazon: https://amzn.to/4a1l15n
- Aliexpress: https://s.click.aliexpress.com/e/_DegA8j7

- 00:00 Prerequisites
- 00:33 fixtSE DIY Sensor Case
- 01:29 How to wire it up
- 01:38 Multi Sensor Dupont Cable
- 03:27 Soldering BH1750 Sensor
- 04:20 Soldering AHT20 BMP280 Sensor
- 07:25 ESPHome Firmware
- 08:51 How to adjust the sensors value

If you like my work, please consider supporting me on Ko-fi! ☕🎉: https://ko-fi.com/fixtse
Patreon: https://patreon.com/fixtSE

You can find me on:
Web: https://fixtse.com/
Instagram: https://www.instagram.com/fixtse/

Hope this was useful and if you have any questions, write me a comment below
Thank you for watching (~ ̄▽ ̄)~