Gathering Thermistor Data with TCP Protocol in Labview
I programmed an ESP32 microcontroller to wirelessly gather data from a thermistor using the Wifi TCP protocol in LabView.
I imported a library called “Wifi.h” that enables network communication through the ESP32 Wifi capabilities and programmed LabView to read and plot these signals .
Thermistors & Other Sensors
Thermistors are made of semiconductor or metal oxide particles. NTC thermistors exhibit a large decrease in electrical resistance for a relatively small increase in temperature. Even with the severe nonlinearity, they are very accurate, and their small package size makes them ideal for measuring temperature in electronics.
On the microcontroller, code is required to set up the analog to digital reading conversion and calculate the temperature with the equation shown to the right.
Other common temperature sensors are Thermocouples and RTDs (Resistance Temperature Detectors).
Thermocouples consist of two wires of dissimilar metals joined at the heated end rod junction and connected to circuitry at the other end. A voltage results at the open end when the joined end is heated.
RTDs are more precise and stable than thermocouples and are more common in the pharmaceutical and biotechnology industries.
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