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2013
Previously, I wrote a blog post about how I displayed the count of my unseen Facebook notifications on a 7-segment display connected to the BeagleBone Black: BeagleBone Black displays Facebook notifications on Adafruit 7-segment.  I decided to do a similar task with the BeagleBone Black & Adafruit 8x8 LED matrix.  My most recent post that shows how it is interfaced with the BBB: Adafruit 8x8 LED matrix controlled by BeagleBone Black. Here's the Python script that grabs the uns ...
Table of Contents Setup LED Blinking MySQL Installation Temperature Sensor Introduction In the previous articles, we set up the BeagleBone to have a MySQL database and a web server.  We also wrote a simple web site to control the LEDs on the BeagleBone.   In this article, we are going to tie all of the pieces together and create a web site that displays the temperature of the room that the BeagleBone is in.  We are going to do this by taking temperature measurements using the ...
Table of Contents Setup LED Blinking MySQL Installation Temperature Sensor Introduction MySQL is a very popular open source database.  In this project, we will use it to store the measured temperature values, which can then be retrieved by a web page.   Installing MySQL Before we start, if you have not updated opkg in a while, you should probably do that first:   opkg update   Now on to the task at hand. Installing MySQL.  There is already an opkg package, so weR ...
Similar to my previous post on Interfacing BeagleBone Black with Adafruit 7-segment LED display, I have hooked up the Adafruit 8x8 LED matrix with I2C "backpack".  This means the matrix is connected with just 4 wires (3.3VDC, GND, SDA, SCL) to the BeagleBone Black (e.g. BBB) which is mounted on the Adafruit BeagleBone Black Proto Plate: And like with the 7-segment LED "backpack", the Python module that Adafruit wrote for the Raspberry Pi works with the BeagleBone Black as well (hooray fo ...
Table of Contents Setup LED Blinking MySQL Installation Temperature Sensor Introduction In the previous article, we set up the BeagleBone to be a webserver running Lighttpd and PHP.   In this article, we are going to build upon that foundation.  We are going to create a web site that lets the user turn on and off an LED on the BeagleBone.  This is a good example of how to create a simple web page that interacts with the BeagleBone and is a step towards our final goal of creat ...
Table of Contents Setup LED Blinking MySQL Installation Temperature Sensor Introduction In this series, we are going to turn our BeagleBone into a web server.  Then we are going to use that web server to monitor the temperature in a room.  To do this, we are going to leverage a couple of common open source programs.  We are going to use lighttpd as our web server.  Then we are going to integrate in PHP to handle the required server side logic.  We will also use a MyS ...
[A followup to Interfacing BeagleBone Black with Adafruit 7-segment LED display]   I've been working on a Python script to display my current number of unseen Facebook notifications (that white number in the redbox in the upper right of Facebook) using a Adafruit 7-segment display connected to a BeagleBone Black (aka BBB). Here is the code on GitHub Gist (a work in progress):   Cheers, Drew http://twitter.com/pdp7 ...
Adafruit's 7-segement LED "Backpack" display turned out to be quite easy to interface with the BeagleBone Black (aka BBB).  "Backpack" means the 7-segment display has a chip on the back side which allows it to be controlled via I2C.  The display just needs power (3.3V) and ground along with the 2 pins on the BBB for I2C data and clock signals.  Here's how I have it wired up on top of an Adadfruit BeagleBone Black prototyping plate: To get the software installed, I started wit ...