PCB-Prototyping-Catalogue >> Home-Automation >> Distributed Power Storage >> USB-A Power Scheduler

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Last update: 15-04-2024

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The optimized design files for each of the hardware electronics listed are only available to my sponsors on GitHub Sponsors. It features many PCB optimizations such as much more energy efficiency and much less EMI on the boards. This means, for instance, much better hardware performance and lasting battery life.

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USB-A Power Scheduler

This is a simple power scheduler with BLE / WIFI connectivity that can turn ON or OFF a USB-A port/plug/outlet on any given day and hour. Compatible with all major commercial vendors and also open source vendors such as Home Assistant. The innovation of this USB Power Scheduler device is in the ability to schedule charging to specific times during the day and night according to the price of electricity change. It can be programmed using machine learning to connect to an electricity market data source and calculate the best time to schedule power according to the price variations in the electricity markets.

Interactive view of the PCB Layout   Interactive view of the circuit schematic
^{Click to view the latest revision}

revision 05-2024
In this most recent revision, I'm using the microcontroller ESP32 C3 and an extreme low power management system that makes this device consume a mere ~360nA when connected to a USB plug and in standby mode. It also features USB-A to Serial UART connectivity on the USB-A male connector for firmware upgrades & updates, and it can also be used to probe a USB Power Delivery Network. More of these Smart Scheduler Devices connected to your home "USB Power Delivery Network", that Network will be more secure and safe from hacks and intrusion.

Plus....
scheduling of charging a device for an hour more convenient, when the electricity price is lower, for instance during late-night hours.

Made to fit a cheap plastic enclosure sold on AliExpress. See the parts list below for more information.

Read all about this open hardware project on ...

Parts List

• buy the Smart PCB electronics (assembled) o Tindie.com
• buy the Plastic enclosure LK-USB07 on AliExpress

Compatibility

Status

The Smart USB-A Scheduler is now Fully functional.

OEM Firmware code

The OEM version of the firmware code can be found in the folder firmware code. It has by default OTA updates, meaning this smart switch device automatically updates itself when newer updated versions are made available here.
This code uses my own ESP32 C++ class libraries to expedite the development of code for ESP32 microcontrollers. The repository is located here for anyone to use.

Home App for Android™

HomeApp is a small and easy to use smart home app with a simple framework. The goal of this application is to make remote execution of predefined features as easy and user-friendly as possible to help you get started with smart home technology.

Original KiCad Project Files

The folder "KiCad Project Files" contains the KiCad Project files, for the hardware electronics of the USB-A Smart Scheduler. Each KiCad project is available with a creative commons share alike non-commercial license.

Go to The KiCad Project Files folder
^{available with a creative commons share alike non-commercial license/sup>}

However, they're not fully complete. If you like it and are looking to use it on your projects, you can download the complete Kicad project files with a one-time donation, click here to learn how, and don't forget to include it in a message the name of the module/hardware electronics you need.
Thank you 🙏.

Author

You can get in touch with me on my LinkedIn Profile:

Miguel Tomas

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The PCB design Files I provide here for anyone to use are free. If you like this Smart Device or use it, please consider buying me a cup of coffee, a slice of pizza or a book to help me study, eat and think new PCB design files.

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License

Before proceeding to download any of AeonLabs software solutions for open-source development and/or PCB hardware electronics development make sure you are choosing the right license for your project. See AeonLabs Solutions for Open Hardware & Source Development for more information.