This DIY mmWave Presence Sensor Changed Everything - LD1125H | digiblurDIY

Summary

This DIY tutorial introduces an affordable ESP home sensor to prevent lights from turning off when you're sitting still. The video demonstrates how to assemble the sensor using an ESP chip and mmWave radar technology to detect minute human movements. It also covers integrating humidity sensors for bathroom automation and provides detailed steps for setting up the ESP Home software, enabling real-time adjustments and automation directly from Home Assistant.

Takeaways

• 🛠️ The video script describes a DIY project to create an ESP home sensor using an inexpensive mm-wave sensor to detect motion and prevent lights from turning off when sitting still.
• 🏠 The project aims to solve the issue of lights going out in places like bathrooms during activities like watching videos or taking a bath, where people might sit still for extended periods.
• 🔍 The mm-wave sensor used in the project is compared to a radar sensor, capable of detecting minute human movements, including breathing, which traditional PIR sensors might miss.
• 💡 The script mentions using an ESP8266 or ESP32 chip for the project, with a preference for ESP32 due to its capabilities, and the use of Dupont connectors for easy plug-and-play assembly.
• 🛒 The LD1125 mm-wave sensor is highlighted as a cost-effective option, costing around 10-12 USD, and its small size is emphasized for easy integration into projects.
• 🔌 The video covers the use of I2C sensors like the BME280 for additional functionalities such as measuring temperature, pressure, and humidity, which can be useful for automating bathroom ventilation.
• 🔧 The script provides practical tips on using a hot glue gun for securing components and ensuring they remain in place, as well as sealing them against moisture.
• 🖥️ The software for the ESP chip is ESP Home, which is compatible with Home Assistant and can be installed through various methods, including Docker or an add-on.
• 🔄 The video demonstrates the process of configuring the ESP Home device, including setting up the sensor's sensitivity and distance parameters, which can be adjusted in real-time through the Home Assistant interface.
• 🔧 The script includes a step-by-step guide on installing the ESP Home software onto the ESP chip, including using the web installer and manually downloading and installing the firmware.
• 🎉 The final takeaway is an encouragement for viewers to build their own motion sensor system, highlighting the cost-effectiveness, ease of customization, and the satisfaction of creating a functional device.

Q & A

What is the main issue the video aims to solve?

The video aims to solve the issue of lights turning off in a room when a person is sitting too still, such as while watching YouTube videos, by using a DIY ESP home sensor.

What is the purpose of the DIY ESP home sensor?

The DIY ESP home sensor is designed to detect movement in a room, preventing the lights from turning off when someone is present but not moving much.

What type of sensor is recommended for this DIY project?

The video recommends using an mm-wave sensor, which is a type of radar sensor that can detect minute human movements, including breathing.

What is the cost of the mm-wave sensor mentioned in the video?

The mm-wave sensor, specifically the LD1125, costs around 10 to 12 U.S. dollars.

What additional sensors can be integrated with the ESP chip for a more comprehensive setup?

Additional sensors like the BME280 or AHT21 for humidity and temperature can be integrated with the ESP chip to create a more comprehensive home automation setup.

How does the video demonstrate the effectiveness of the DIY sensor?

The video demonstrates the effectiveness of the DIY sensor by showing it triggering occupancy detection even when the person is lying in a tub and barely moving.

What is the significance of using Dupont connectors in the project?

Dupont connectors are used for their simplicity and ease of use; they allow for plug-and-play functionality without the need for soldering.

How can one adjust the sensitivity of the mm-wave sensor?

The sensitivity of the mm-wave sensor can be adjusted through the software settings in the ESP home dashboard, allowing for customization based on the specific environment.

What software is recommended for programming the ESP chips?

ESP Home is the recommended software for programming the ESP chips, which is compatible with Home Assistant for easy integration and automation.

How can one ensure the DIY sensor is not triggered by constant moving devices like ceiling fans?

One can adjust the sensor's sensitivity and angle, or use metal pieces to direct the signal away from constant moving devices to prevent false triggers.

What is the process for installing the software on the ESP chip?

The process involves downloading the software, using a web installer for ESP Home, connecting the ESP chip to a computer, and then installing the software via the web interface.