Introduction¶

CircuitPython module for the MAX31865 thermocouple amplifier.

Dependencies¶

This driver depends on:

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Usage Example¶

See examples/simpletest.py for a demo of the usage.

Contributing¶

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.

API Reference¶

`adafruit_max31865`¶

CircuitPython module for the MAX31865 platinum RTD temperature sensor. See examples/simpletest.py for an example of the usage.

Author(s): Tony DiCola

class adafruit_max31865.MAX31865(spi, cs, *, rtd_nominal=100, ref_resistor=430.0, wires=2)[source]¶

Driver for the MAX31865 thermocouple amplifier.

auto_convert¶: Get and set the boolean state of the sensor’s automatic conversion mode (True/False).

bias¶: Get and set the boolean state of the sensor’s bias (True/False).

clear_faults()[source]¶: Clear any fault state previously detected by the sensor.

fault¶

Get the fault state of the sensor. Use clear_faults to clear the fault state. Returns a 6-tuple of boolean values which indicate if any faults are present:

HIGHTHRESH

LOWTHRESH

REFINLOW

REFINHIGH

RTDINLOW

OVUV

read_rtd()[source]¶: Perform a raw reading of the thermocouple and return its 15-bit value. You’ll need to manually convert this to temperature using the nominal value of the resistance-to-digital conversion and some math. If you just want temperature use the temperature property instead.

resistance¶: Read the resistance of the RTD and return its value in Ohms.

temperature¶: Read the temperature of the sensor and return its value in degrees Celsius.