"KCS" v3.27.4 firmware BIN file download

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new version improvement:

1. Added: Automatic GPIO expander detection, supporting both PCF8575 and XL9555SS.
2. Added: Per-channel current direction reversal settings for the N series.
3. Improved: IR learning capacity and storage, and data saving before restarting via the web interface.
4. Fixed: Issues with ADC current sampling and 4–20 mA conversion.
5. Fixed: Incorrect reporting of zero accumulated energy at startup.
6. Fixed: Clearing energy totals unintentionally resetting calibration coefficients.
7. Fixed: SHT30 read failures after a software restart and stack overflow issues with Modbus sensors.
8. Fixed: Incorrect state class for Home Assistant power sensors.