I wrote a module to help with this: curiously, there wasn't a generic module for MicroPython to work with NTC thermistors.
It needs a bunch of testing on other platforms and with something other than a KY-013, but I've had the thermistor agree with a nearby AHT20 to within 0.2 degrees C.
scruss/micropython-simple-thermistor: read NTC thermistor temperature wired in a potential divider
Sample code:
It needs a bunch of testing on other platforms and with something other than a KY-013, but I've had the thermistor agree with a nearby AHT20 to within 0.2 degrees C.
scruss/micropython-simple-thermistor: read NTC thermistor temperature wired in a potential divider
Sample code:
Code:
# MicroPython, Raspberry Pi Pico# pylint: disable=E0401# -*- coding: utf-8 -*-import machineimport timefrom simple_thermistor import Thermistor# setup for KY-013-alike thermistor on GPIO 26t = Thermistor( adc=machine.ADC( 26 ), # ADC object with read_u16() method returning 0–65535 beta=3950, r0=10000, # thermistor nominal resistance of 10 kΩ at 25 °C t0=Thermistor.fromC(25), # everything is Kelvin internally resistor=10000, # high side resistor of 10 kΩ)while True: print( "%6.1f °C / %.1f Ω" % (Thermistor.toC(t.temperature()), t.resistance()) ) time.sleep(5)Statistics: Posted by scruss — Wed Oct 30, 2024 1:35 am