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CircuitPython interface for DYMO postage scales.

NOTE: This library will not work on embedded linux, only on microcontrollers.


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.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install adafruit-circuitpython-dymoscale

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

sudo pip3 install adafruit-circuitpython-dymoscale

To install in a virtual environment in your current project:

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

Usage Example

Initialize the scale by passing it a data pin and a pin to toggle the units button:

# initialize the dymo scale
units_pin = digitalio.DigitalInOut(board.D3)
dymo = adafruit_dymoscale.DYMOScale(board.D4, units_pin)

Get the item’s weight from the scale:

reading = dymo.weight

Get the item’s units from the scale:


To toggle between units (simulate a button press):


To toggle the unit button, but preserve the unit displayed:



API documentation for this library can be found on Read the Docs.

For information on building library documentation, please check out this guide.


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

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