Support for negative values?

[danergo]

Is it possible to display negative (-2 °C) values on this hygrometer?

[53RT]

It does display negative temperatures. But I don't know how it will display double digit negative values as there is no third 7-segment digit for the temperature. In the spec sheet it says the device is not suited for under 0 °C. I also remember when testing low temperatures that the display gets dark and unresponsive at some point.

[danergo]

Thx. According to some disassembled pictures, it sports Sensirion's SHTC3 sensor which is capable for measuring between -40 - 125 ˚C.

My plan is to get rid of the firmware and rebuild it, and use the large displays (where now the clock is) to display the outside temperature (which is sometimes negative).