Open source Rust firmware for the KOWSI KWS-X1 USB-C meter. Live power, the charger's full USB PD offer (EPR included), fixed, PPS and AVS triggers up to 28/30 V, Quick Charge 2.0/3.0, cable e-marker reading and a 5 A test, and PD passthrough sniffing. Built on Embassy, no vendor firmware needed.
rust firmware cortex-m4 no-std power-meter custom-firmware pps usb-pd embassy usb-c embedded-rust usb-tester fusb302 hc32f460 open-source-firmware usb-power-delivery kowsi kws-x1 quick-charge pd-trigger
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Updated
Oct 14, 2026 - Rust