Python and CircuitPython

It's easy to use the ADT7410 sensor with Python or CircuitPython, and the Adafruit CircuitPython ADT7410 module. This module allows you to easily write Python code that reads 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 ADT7410 to your board exactly as shown on the previous page for Arduino. 

Make the following connections between the CircuitPython board and the ADT7410:

  • Board 3V to ADT7410 VIN
  • Board GND to ADT7410 GND
  • Board SCL to ADT7410 SCL
  • Board SDA to ADT7410 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

Make the following connections between the Pi and the ADT7410:

  • Pi 3V to ADT7410 VIN
  • Pi GND to ADT7410 GND
  • Pi SCL to ADT7410 SCL
  • Pi SDA to ADT7410SDA

CircuitPython Installation of ADT7410 Library

You'll need to install the Adafruit CircuitPython ADT7410 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.  For example the Circuit Playground Express guide has a great page on how to install the library bundle for both express and non-express boards.

Remember for non-express boards like the Trinket M0, Gemma M0, and Feather/Metro M0 basic you'll need to manually install the necessary libraries from the bundle:

  • adafruit_adt7410.mpy
  • adafruit_bus_device
  • adafruit_register

You can also download theadafruit_adt7410.mpy from its releases page on Github.

Before continuing make sure your board's lib folder or root filesystem has the adafruit_adt7410.mpy, adafruit_register, 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 ADT7410 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-adt7410

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!

Python Usage

To demonstrate the usage of the ADT7410, we'll use the Python REPL.

First, we'll import the following modules:

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import time
import board
import busio
import adafruit_adt7410

Next, we'll initialize the i2c bus and create the ADT object. We'll set it's high_resolution property to True, to use 16-bit resolution (instead of the default 13-bit).

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i2c_bus = busio.I2C(board.SCL, board.SDA)
adt = adafruit_adt7410.ADT7410(i2c_bus, address=0x48)
adt.high_resolution = True

You can read the temperature using the .temperature property (the output will be in degrees Celsius). Try putting your finger on the sensor or holding it against something cold to see the values change.

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adt.temperature

You can convert to Fahrenheit by multiplying by 1.8 and adding 32 as you have learned in grade school:

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tempC = adt.temperature
tempF = tempC * 1.8 + 32
tempF

That's all there is to reading the temperature with the ADT7410. Now you can use the ADT7410 temperature sensor to read the temperature in your project!

Full Example Code

import time
import board
import busio
import adafruit_adt7410

i2c_bus = busio.I2C(board.SCL, board.SDA)
adt = adafruit_adt7410.ADT7410(i2c_bus, address=0x48)
adt.high_resolution = True

while True:
    print(adt.temperature)
    time.sleep(0.5)
This guide was first published on Feb 06, 2019. It was last updated on 2019-02-14 20:33:02 -0500. This page (Python and CircuitPython) was last updated on Feb 14, 2019.