April 15, 2014 AT 1:00 am

BeagleBone Black plot analog sensor on #Adafruit bi-color LED matrix #beagleboneblack @TXInstruments @beagleboardorg


Thanks to Drew Fustini for sending in his project! Via the element 14 community.

I’ve previously had great results connecting Adafruit 8×8 LED matrix displays to the BeagleBone Black via I2C:

I decided to try out the Adafruit bi-color 8×8 LED matrix and hooked it up with the same I2C pins as before. You’ll need to setup the Adafruit_BBIO Python library if you haven’t already:

You’ll also want to grab the Adafruit Python libraries for the Raspberry Pi since they work on BeagleBone Black, too:

Here is the BegaleBone Black running the demo program ex_8x8_color_pixels.py from the repo:

I thought it would be interesting to plot the readings from a sensor over time on the matrix with different colors representing the magnitude of the reading:

I hooked up a pot to the analog input to simulate a sensor. Here’s the Python script:

It is Invoked by this shell script so that PYTHONPATH will be set:

Read more.

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