[Bug]: Temperature and humidity wrong values

[user-hash]

Would you like to work on a fix?

• [ ] Check this if you would like to implement a PR, we are more than happy to help you go through the process.

Have you tried with the latest version and does the problem still exist?

• [X] Yes, I have tried with the latest version and the problem still exists.

Current and expected behavior

I think this problem occurs only in latest version with web installer. When you install the CO2-Gadget via the webpage an then add wifi setting + altitude (380) + temperature (-2) , the temperature and humidity starts displaying wrong values.

Reproduction

When you install the CO2-Gadget via the webpage an then add wifi setting + altitude (380) + temperature (-2), the temperature and humidity starts displaying wrong values.

If applicable, add screenshots to help explain your problem

CO2 Gadget version

v0.014.006

Which CO2 Gadget flavour are you using?

• [ ] Generic ESP32 without display
• [ ] OLED
• [X] TFT
• [ ] e-Ink
• [ ] Other (please specify below)

How do you install CO2 Gadget?

• [X] From the web installer
• [ ] From the source code on GitHub
• [ ] Other (please specify below)

Possible solution

It could be because the dropdown menu in web installer/web config for the Temperature Offset (Cº) only goes in positive values, but I have not looked at the code.

What particle sensor will be supported in the next updates? Will it work at the same time as the CO2 sensor? Many thanks for this excellent project!