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esp32-ai
A 28.9 million parameter language model runs on an $8 ESP32-S3 microcontroller entirely on-device, generating simple stories at about 9.5 tokens per second.
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FR-AI / ANALYSISWhy it is worth attention
It enables a hidden hardware battery charge limiter feature on consumer laptops like HP Pavilion that lack official support, using EC-level control on both Windows and Arch Linux.
Who it is for
- Owners of HP Pavilion laptops without Battery Health Manager
- Users of Windows or Arch Linux who want to extend battery lifespan
- Tinkerers comfortable with hardware-level EC register manipulation
- Users of other laptops seeking to discover their own EC registers
Use cases
- Set an 80% charge limit to reduce lithium-ion battery degradation
- Run a headless daemon on Arch Linux to maintain charge stop automatically
- Use the detection scripts to find the correct EC register for any laptop
- Re-enable hidden charge-limiting hardware on consumer-grade laptops
Strengths
- Cross-platform support with one-click setup for Windows and Arch Linux
- Works at the hardware EC level rather than relying on software-based charging control
- Includes detection scripts and a community register database for other laptops
- Automatically re-applies the charge inhibit every few seconds to counter EC register resets
Considerations
- Only tested on HP Pavilion 15-eg3xxx; other models require manual EC register discovery
- Windows setup requires either disabling Secure Boot or using a signed driver (RwDrv.sys)
- Arch Linux daemon uses a 60-second poll interval which may not work if the ACPI path is unstable
README quick start
Quick Start
Description
Reverse-engineered the Embedded Controller register for battery charge control. Built a cross-platform daemon (Windows + Arch) that enforces 80% hardware cap on laptops where BIOS hides this feature. Includes EC discovery tool for other models.
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