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:
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:
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:
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).
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.
adt.temperature
You can convert to Fahrenheit by multiplying by 1.8 and adding 32 as you have learned in grade school:
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!
# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT
import time
import board
import adafruit_adt7410
i2c = board.I2C() # uses board.SCL and board.SDA
adt = adafruit_adt7410.ADT7410(i2c, address=0x48)
adt.high_resolution = True
while True:
print(adt.temperature)
time.sleep(0.5)
