ESP 32 reading NTC thermistor value. (food probe) and reference voltage

Hello
I'm using an ESP32 and a NTC food probe I want to read temperature for my BBQ.. I did look at few web page about NTC probe, it but I'm lost. I did played with ADC back in 1980 so let say that the theories are lost is the memories

I want to read the resitance value of an NTC food probe. Idealy, I would like to read it using a knonw max value, the smalless the better. The actual reading is about 250 k at 0'C and around 12.5k at 100' C

  • Can I set an external reference voltage?

  • If not, what is the reference voltage of the ESP32 ADC

  • Should I use an OP-AMP to interface the probe tp the ESP pin. If I recall, I did use that back whan I was in college

  • What would be the electronic circuit to hook-up the probe?

  • If attached directly to a pin, should I use any protection to prevent any problem to the processor?

Any help or bit of information trully appreciated

Martin.

P.S. excuse my English.

The ESP32 API

Thank you Idahowalker. This is a valuable information site but, I'm lost deeper nowI. So many new concept and terminologies. I will study to enhance my knowledge.

Martin :o

You are welcome, +1.

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