NTC

NTC thermistor

NTC thermistor Sensor.

There are two connection methods for NTC resistors: NTC connected to VCC or GND, as shown in the figure.

description

• NTC_GND(adc, max, B=3780)

• NTC_VCC(adc, max, B=3780)

  Convert numerical values to Celsius temperature.

  • adc, NTC input value, it can be voltage or ADC value.
  • max, maximum value for ADC, it can be voltage (usually Vcc) or ADC value.
  • B, B value of NTC resistor.

If using esp32 series chips, use ADC.read_uv() to get ADC value for best optimal accuracy.

example

from machine import ADC, Pin

ADC_T1 = ADC(Pin(34), atten=ADC.ATTN_11DB)
ADC_T2 = ADC(Pin(33), atten=ADC.ATTN_11DB)

T1 = NTC_VCC(ADC_T1.read_uv()/1000, 3300)
T2 = NTC_GND(ADC_T2.read_uv()/1000, 3300, B=3950)

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