Freedom To Play (Page 2)

Configuring a VLAN per SSID with OpenWRT and pfSense

Architecture Overview My current network setup uses pfSense [https://www.pfsense.org/] as the firewall and DHCP server with OpenWRT [https://openwrt.org/] running on a TL-WA801ND [http://amzn.to/2sdx0HQ] wireless access point. OpenWRT broadcasts two SSIDs which reside on two different VLANs. After a power outage my pfSense

Using python to plot ledger transactions

ledger [http://ledger-cli.org/] is a very capable piece of software for double-entry accounting. However, it only provides one out-of-the-box option for visualizing transactions: gnuplot [http://www.gnuplot.info/]. Rather than learn a non-FOSS tool (gnuplot is not really GNU), I set out to get ledger transactions into pandas [http:

Nest Thermostat v3 Teardown

Quick and Dirty Look at the PCB Work in progress, complements the FCC Application [https://fccid.io/document.php?id=2715044] Screen Side * Freescale MCIMX6X3EVK10AB [http://www.nxp.com/webapp/search.partparamdetail.framework?PART_NUMBER=MCIMX6X3EVK10AB] * Data Sheet [http://www.nxp.com/assets/documents/data/en/data-sheets/IMX6SXCEC.pdf] * 6TDID

Kali Linux on the BeagleBone Green Wireless

Some bad news Unfortunately, the BeagleBone Green Wireless [https://beagleboard.org/green-wireless] uses the Texas Instrument WL1835 [http://www.ti.com/product/WL1835MOD] which does not [https://e2e.ti.com/support/wireless_connectivity/wilink_wifi_bluetooth/f/307/t/447185] support monitor mode. The BeagleBone Green Wireless cannot be used

On a Researcher's Momentum

One day a coworker casually claimed "As a researcher you have a fixed momentum: if the number of projects you have lowers then you're able to work faster". This is an exploration of his claim. Every researcher has a fixed momentum First, the momentum of a particle: $$p = mv$$ where

i3, udev, & xrandr: Hotplugging & Output Switching

One of the benefits of using a Desktop Environment (DE) like Gnome or KDE is that a lot of "user friendly" things are automagically taken care of. With i3, a minimalist Window Manager, that is not the case. One of the more convenient things missing from a default i3 installation

Using curl with the Amazon Product Request API

Motivation Amazon provides a handy Product Advertising API [http://docs.aws.amazon.com/AWSECommerceService/latest/DG/Welcome.html] that allows you to fetch the price, reviews, description, and image (among other things) for products. There are several examples on how to use the API for Ruby, PHP, Python, and Java.

Envelope Budgeting with ledger

To fully appreciate this tutorial, a rudimentary understanding of ledger [http://www.ledger-cli.org/], double-entry accounting [https://en.wikipedia.org/wiki/Double-entry_bookkeeping_system], and envelope budgeting [http://www.daveramsey.com/blog/envelope-system-explained] will be necessary. The Goal: * An envelope budgeting system similar to YNAB * Envelopes that "roll-over" and don't

Nehalem CPU Power State

Recently I re-installed Arch Linux after a several year hiatus. One of the hiccups in coming back was that I'm no longer running the latest and greatest hardware. My CPU (Nehalem) is power managed with the acpi_cpufreq module while the latest and greatest processors are using a new p-states

Using mbed with Kinetis Design Studio

A brief overview of the process for building mbed projects with Kinetis Design Studio 1. Install the necessary tools 2. Modify the mbed toolchain to support KDS 2a) Modify the mbed source code to be more KDS/K64F friendly 3. Build the mbed core library 4. Build a sample mbed

Making K64F pin D8 functional in mbed

Freescale has released several versions of FRDM-K64F. All of the revisions have been minor except for Revision E, the most recent version. In previous revisions of the board, pin D8 on the K64F (J2.2) was routed to pin PTA0 on the K64 processor. Unfortunately, PTA0 is used for JTAG

Beginning of Time

What's the blog all about? I'm writing this blog to document my adventures with the Freescale FRDM K64F. There is not a whole lot of literature on how to get up and running with these powerful little dev boards and I am trying to fill that gap. Erich Styger's mcuoneclipse