There are many good reasons to avoid commercially made home automation systems and roll your own. First of all, you take back control of your data, and can choose where and when to store it or delete it. For many, that’s reason enough; but you also get benefits such as being able to combine sensors from multiple vendors, create custom web UIs for viewing data and creating schedules and actions, and easy integration with open source software like Home Assistant. The Home Automation Mate from Elecram is an all-in-one home automation “hub”, ready for integration into an existing system or to serve as the base in an entirely new one!
Featuring the venerable ESP32-S3 Wifi/BT microcontroller, it supports a wide array of sensors out of the box, including CO₂ sensors (SCD40/41, MH-Z19), particulate matter sensors (PMS5003), and the Bosch BME280/BME680. Additionally, you can add any compatible Stemma QT/Qwiic compatible sensors or breakouts for additional functionality. A built-in colour OLED header makes it easy to show system status at a glance on a compatible display.
For powering everything, the board supports USB-C Power Delivery up to 9V, or 12-24V in through a standard barrel jack. An onboard regulator gives 5V/2A and 3.3V/0.5A for circuitry, plus a regulated output adjustable from 0.2-12V using PWM from the microcontroller. The same connector can also be used to power fans, either for drawing in air to sample or to cool power-hungry components like motor drivers.
If you’re willing to roll up your sleeves and dive into some coding, this platform is an excellent way to get started on a custom home automation setup. The creator has some example code repositories available for viewing and modifying: an air purifier project, and a plant monitoring project.
source https://blog.tindie.com/2025/08/home-automation-controller/
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