Code is wrong

[saltydog693]

When you heat up the thermistor you will see the temperature dropping in the serial monitor? It should be the other way around. Checking the library source code (thermistor.cpp) on the calculations we found a mistake in the calculation of the resistance.

100 // convert the value to resistance
101 average = ADC_RESOLUTION / average - 1;
102 average = serialResistance * average;

We had to correct line 102 as below (times should be divided!).

100 // convert the value to resistance
101 average = ADC_RESOLUTION / average - 1;
102 average = serialResistance / average;

Now the code works as it should be.

[dberenguer]

You just needed to put thermistor and resistor the other way around. Daniel Berenguer http://www.panstamp.com

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On Mon, 30 Mar 2020 at 21:16, saltydog693 ***@***.***> wrote: When you heat up the thermistor you will see the temperature dropping in the serial monitor? It should be the other way around. Checking the library source code (thermistor.cpp) on the calculations we found a mistake in the calculation of the resistance. 100 // convert the value to resistance 101 average = ADC_RESOLUTION / average - 1; 102 average = serialResistance * average; We had to correct line 102 as below (times should be divided!). 100 // convert the value to resistance 101 average = ADC_RESOLUTION / average - 1; 102 average = serialResistance / average; Now the code works as it should be. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#8>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAGX365LH3IMI6TOWHIFGM3RKDVYJANCNFSM4LW2S2IA> .

[tablatronix]

Perhaps a good feature would be to add and inverting flag

[LDighera]

This is useful information.
With a Seeedunio XIAO, pin voltage is limited to 3.3V max, so using 5V on the divider circuit to increase resolution, and connecting the thermistor to GND prevents exceeding maximum rating when thermistor resistance value decreases.

Many thanks for the support.