How to wire and code thermistor that can also detect liquid level?

[DaveX]

@whatinthe

What I am unsure is whether one of the switch wires go to ground and the other switch wire goes to the 5v plug directly,

No. If you did that, when the switch closes, it would short ground to 5V and do something bad.

You wire the two red wires of the switch like a button:

@DaveX

• How to get the best out of this forum by @PerryBebbington -- to learn how to post productive questions.
• How to Wire and Program a Button -- A discussion of the official Arduino "How to Wire and Program a Button" tutorial that goes with the Arduino IDE's built-in File/Examples/02Digital/Button.ino example. This thread shows some concerns about the tutorial and advice about how to wire up a button safer and easier.

How to Wire and Program a Button

I thought @LarryD's diagram about wiring was good: [image] [image] LarryDButtons - Wokwi ESP32, STM32, Arduino Simulator Also: And there are good references at Gammon Forum : Electronics : Microprocessors : Switches tutorial -- @nickgammon on the differences, software and hardware debouncing. Shows an oscilloscope plot of debouncing an Uno with 1uF capacitor for a 36ms response. https://www.ganssle.com/debouncing-pt2.htm -- Jack Ganssle o…