Installing Required Packages

We will need to have support for git, Python, and the Onion OLED Expansion Python Module.

opkg update
opkg install git git-http python-light python-codecs pyOledExp

Downloading the Code

Now we need to download the Python code that actually does all the work:

cd /root
git clone https://github.com/OnionIoT/oledQrCodeGenerator.git

Running the Code

Now we have to make some QR codes! Navigate into the repo directory:

<span class="hljs-built_in">cd</span> oledQrCodeGenerator

And run the program, the argument to the script is the text that will be encoded in the QR code pattern:

root<span class="hljs-variable">@Omega-18C2:</span>~/oledQrCodeGenerator# python main.py <span class="hljs-string">&apos;Wow, my first QR Code&apos;</span>
> Encoding <span class="hljs-number">21</span> characters<br>> Generated QR <span class="hljs-attribute">Code</span>: <span class="hljs-number">31</span>x31 pixels
> Doubled QR Code <span class="hljs-attribute">size</span>: <span class="hljs-number">62</span>x62
> Initializing display
> Setting display mode to inverted
> Writing buffer data to display

This will encode the data and display the resulting QR code on the OLED Expansion:

Using the code as a Python Module

You can use the oledQRCodeGenerator module in your own Python projects!

Example:

import oledQrCodeGenerator
oledQrCodeGenerator.dispQrCode('Hello!')

Tutorial Complete!

You can now use a smartphone to read the QR code on the OLED:

• On Android, we've successfully used the QR Code Reader App

• On iOS, we've had success with the QR Reader App

Happy hacking!

The code in the qrcode directory is from lincolnloop's python-qrcode:

This guide was taken from the onion wiki: