I am using this tutorial to connect a pressure transducer to nodemcu. I have connected the nodemcu A0 pin to an Adafruit logic level shifter and then to the pressure level sensor. I setup an 'Analog input -internal' device to read the voltage input. With no pressure the Analog input gives a value of 166.What are the unit for this number? I measured the voltage and it was indeed 0.5V as expected.
The pressure range for the sensor is 0-1.2MPa (0 to 174 psi) over 0.5-4.5V. How can I calibrate for this range?
Pressure transducer with nodemcu
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