Python & CircuitPython

It's easy to use the TMP007 sensor with Python or CircuitPython and the Adafruit CircuitPython TMP007 module.  This module allows you to easily write Python code that reads the temperature from the sensor.

You can use this sensor with any CircuitPython microcontroller board or with a computer that has GPIO and Python thanks to Adafruit_Blinka, our CircuitPython-for-Python compatibility library.

CircuitPython Microcontroller Wiring

First wire up a TMP007 to your board exactly as shown in the previous pages for Arduino. Here's an example of wiring a Feather M0 to the sensor with I2C:

  • Board 3V to sensor VCC
  • Board GND to sensor G
  • Board SCL to sensor SCL
  • Board SDA to sensor SDA

Python Computer Wiring

Since there's dozens of Linux computers/boards you can use we will show wiring for Raspberry Pi. For other platforms, please visit the guide for CircuitPython on Linux to see whether your platform is supported

Here's the Raspberry Pi wired with I2C:

  • Pi 3V3 to sensor VIN
  • Pi GND to sensor GND
  • Pi SCL to sensor SCK
  • Pi SDA to sensor SDA

CircuitPython Installation of TMP007 Library

You'll need to install the Adafruit CircuitPython TMP007 library on your CircuitPython board.

First make sure you are running the latest version of Adafruit CircuitPython for your board.

Next you'll need to install the necessary libraries to use the hardware--carefully follow the steps to find and install these libraries from Adafruit's CircuitPython library bundle.  Our Welcome to CircuitPython guide has a great page on how to install the library bundle.

For non-express boards like the Trinket M0 or Gemma M0, you'll need to manually install the necessary libraries from the bundle:

  • adafruit_tmp007.mpy
  • adafruit_bus_device

Before continuing make sure your board's lib folder or root filesystem has the adafruit_tmp007.mpy, and adafruit_bus_device files and folders copied over.

Next connect to the board's serial REPL so you are at the CircuitPython >>> prompt.

Python Installation of TMP007 Library

You'll need to install the Adafruit_Blinka library that provides the CircuitPython support in Python. This may also require enabling I2C on your platform and verifying you are running Python 3. Since each platform is a little different, and Linux changes often, please visit the CircuitPython on Linux guide to get your computer ready!

Once that's done, from your command line run the following command:

  • sudo pip3 install adafruit-circuitpython-tmp007

If your default Python is version 3 you may need to run 'pip' instead. Just make sure you aren't trying to use CircuitPython on Python 2.x, it isn't supported!

CircuitPython & Python Usage

To demonstrate the usage of the sensor we'll initialize it and read the die temperature and object temperature from the board's Python REPL.

First, run the following code to import the necessary modules and initialize the I2C connection with the sensor:

Download: file
import board
import busio
import adafruit_tmp007
i2c = busio.I2C(board.SCL, board.SDA)
sensor = adafruit_tmp007.TMP007(i2c)

Now you're ready to setup the sensor and read the values using these properties:

  • die_temperature - reads sensor die temperature and return its value in degrees Celsius.
  • temperature - reads the object temperature and returns it's value in degrees Celcius.

For example, to print the die temperature and object temperature:

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print('Die temperature: {0:0.3F}*C'.format(sensor.die_temperature))
print('Object temperature: {0:0.3F}*C'.format(sensor.temperature))

That's all there is to using the TMP007 with CircuitPython!

Full Example Code

#!/usr/bin/python
# Author: Adapted to CircuitPython by Jerry Needell
#     Adafruit_Python_TMP example by Tony DiCola
#

import time
import board
import busio
import adafruit_tmp007


# Define a function to convert celsius to fahrenheit.
def c_to_f(c):
    return c * 9.0 / 5.0 + 32.0



# Create library object using our Bus I2C port
i2c = busio.I2C(board.SCL, board.SDA)
sensor = adafruit_tmp007.TMP007(i2c)



# Initialize communication with the sensor, using the default 16 samples per conversion.
# This is the best accuracy but a little slower at reacting to changes.
# The first sample will be meaningless
while True:
    die_temp = sensor.die_temperature
    print('   Die temperature: {0:0.3F}*C / {1:0.3F}*F'.format(die_temp, c_to_f(die_temp)))
    obj_temp = sensor.temperature
    print('Object temperature: {0:0.3F}*C / {1:0.3F}*F'.format(obj_temp, c_to_f(obj_temp)))
    time.sleep(5.0)
This guide was first published on Aug 05, 2014. It was last updated on Aug 05, 2014. This page (Python & CircuitPython) was last updated on Aug 13, 2019.