Add selector of recognized data type

[mkbodanu4]

The Feature

Thanks for a great tool!

I set up it running and working not with a meter, but with a radiation dosimeter. My dosimeter has a LCD display so this software works perfectly to get the ambient dose equivalent rate (DER) of gamma and X-ray radiation.

But the only problem I got was that values sent to MQTT and Home Assistant are Value and Rate, calculated on values difference. But in my case, I collecting not a value, but a rate directly. So it will be great to have the ability to select which data is collected - momentary value or rate. Maybe for someone, who uses this tool to recognize the rate of something, this new feature will be useful as well.