LM Home Mini Temperature Gauge
To read out the temperature I uploaded the code to Arduino Nano. Then it was a simple matter to send the reading to a 4 digit display.
LM Home Mini Board
The top left corner is where the board’s thermistor plugs in (I think).
It’s a really clever design that seems to be most accurate when the brew boiler is between 90°C and 100°C.
Simply reading this voltage and converting the number using steinhart equations should give an accurate temperature reading of the brew boiler.