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https://github.com/pybricks/pybricks-api.git
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Laurens Valk
b0ffb24a2e
These code samples are rendered in the docs, so we include them here. For the git history of these snippets, see: https://github.com/pybricks/pybricks-projects/commits/f4914069aaacfd9ab1e0dd6f05524f62cfc56b29/snippets
33 lines
875 B
Python
33 lines
875 B
Python
#!/usr/bin/env pybricks-micropython
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from pybricks.parameters import Port
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from pybricks.nxtdevices import VernierAdapter
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from math import log
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# Conversion formula for Surface Temperature Sensor
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def convert_raw_to_temperature(voltage):
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# Convert the raw voltage to the NTC resistance
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# according to the Vernier Adapter EV3 block.
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counts = voltage/5000*4096
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ntc = 15000*(counts)/(4130-counts)
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# Handle log(0) safely: make sure that ntc value is positive.
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if ntc <= 0:
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ntc = 1
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# Apply Steinhart-Hart equation as given in the sensor documentation.
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K0 = 1.02119e-3
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K1 = 2.22468e-4
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K2 = 1.33342e-7
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return 1/(K0 + K1*log(ntc) + K2*log(ntc)**3)
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# Initialize the adapter on port 1
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thermometer = VernierAdapter(Port.S1, convert_raw_to_temperature)
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# Get the measured value and print it
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temp = thermometer.value()
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print(temp)
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