SunFounder ESP32 Starter Kit
• exp is the abbreviation of exponential, and the base number e is a natural number and equals 2.7
approximately.
Convert this formula TK=1/(ln(RT/RN)/B+1/TN) to get Kelvin temperature that minus 273.15 equals
degree Celsius.
This relation is an empirical formula. It is accurate only when the temperature and resistance are within
the effective range.
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You can also display the calculated Celsius and Fahrenheit temperatures on the I2C LCD1602.
Note:
• Open the 5.10_thermistor_lcd.py file located in the esp32-starter-kit-main\micropython\codes
path, or copy and paste the code into Thonny. Then, click “Run Current Script” or press F5 to execute it.
• Make sure to select the “MicroPython (ESP32).COMxx” interpreter in the bottom right corner.
• Here you need to use the library called lcd1602.py, please check if it has been uploaded to ESP32, for a detailed
tutorial refer to 1.4 Upload the Libraries (Important).
# Import the necessary libraries
from machine import ADC, Pin
from lcd1602 import LCD
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3.28. 5.10 Temperature Sensing 391
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