Introduction

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This is a CircuitPython driver for the MCP9600 thermocouple I2C amplifier. In addition to the MCP9600 breakout, you will also need a thermocouple, which can be found in the Adafruit store. The MCP9600 supports several thermocouple types for different temperature ranges. The "K" type is the default, with a range of -200C to +1372C.

Dependencies

This driver depends on:

• Adafruit CircuitPython <https://github.com/adafruit/circuitpython>_

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>_.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI <https://pypi.org/project/adafruit-circuitpython-mcp9600/>_. To install for current user:

.. code-block:: shell

pip3 install adafruit-circuitpython-mcp9600

To install system-wide (this may be required in some cases):

.. code-block:: shell

sudo pip3 install adafruit-circuitpython-mcp9600

To install in a virtual environment in your current project:

.. code-block:: shell

mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-mcp9600

Usage Example

This is a simple example showing the hot junction temperature (the temperature at the tip of the thermocouple). You may need to adjust the I2C frequency if you receive input/output errors.

.. code-block:: shell

import board
import busio
from adafruit_bus_device.i2c_device import I2CDevice
from adafruit_mcp9600 import MCP9600

i2c = busio.I2C(board.SCL, board.SDA,frequency=200000)
try:
    # using default I2C register and "K" thermocouple
    device = MCP9600(i2c)
    print("temperature(C):",device.temperature)
except ValueError:
    print("MCP9600 sensor not detected")

This example displays the ambient/room and hot junction temperatures at 1 second intervals. Turn on the Mu editor's plotter option to view the temperatures in a real-time graph.

.. code-block:: shell

import board
import busio
import time
from adafruit_bus_device.i2c_device import I2CDevice
from adafruit_mcp9600 import MCP9600

i2c = busio.I2C(board.SCL, board.SDA, frequency=200000)

try:
    device = MCP9600(i2c)
    print("version:", device.version)
    while True:
        print((
            device.ambient_temperature,
            device.temperature
        ))
        time.sleep(1)
except ValueError:
    print("MCP9600 sensor not detected")

Documentation

API documentation for this library can be found on Read the Docs <https://docs.circuitpython.org/projects/mcp9600/en/latest/>_.

For information on building library documentation, please check out this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>_.

Contributing

Contributions are welcome! Please read our Code of Conduct <https://github.com/adafruit/Adafruit_CircuitPython_MCP9600/blob/main/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.