Update PID 0xC035: expand device description per howto guidelines

Author: krzysztofgawrys

1209/C035/index.md

@@ -6,4 +6,12 @@ license: Apache-2.0
 site: https://github.com/krzysztofgawrys/ch32x035-usb-power-meter
 source: https://github.com/krzysztofgawrys/ch32x035-usb-power-meter
 ---
-USB power meter with INA228 20-bit sensor, ST7789 color TFT display and CDC data logging shell, based on WCH CH32X035 (RISC-V).
+USB power meter built around the WCH CH32X035 RISC-V microcontroller.
+
+Hardware: INA228 20-bit power/energy monitor (up to 85 V, 10 mOhm shunt),
+ST7789 240x135 color TFT display, USB-C connector for Full-Speed USB.
+
+Firmware: bare-metal C, USB CDC virtual serial port with an interactive
+data logging shell (live streaming, averaging, calibration, mAh/mWh
+accumulator, min/max tracking). Supports USB DFU 1.1 firmware updates
+via a companion bootloader.