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Hank Barta
52 followers
52 followers
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Hank's posts

Thank you so much for all of the Linux Luddites episodes. They were great when Joe and Paddy were doing them and got better when Jesse joined.

I do look forward to Late Night Linux and I'm happy that something will continue on but I'm sure I'll also miss Linux Luddites.

Thanks!

Is this a good place to ask questions? I hope so!

I'm interested in using small devices like Arduino and other microcontrollers for doing Neat Things around the home. One of the basic building blocks I need is some kind of wireless communication. The devices don't necessarily need to communicate with each other but I do want communications with a PC (running Linux, if that matters.)

One of the processor boards I'm considerint is the STM32F4 Discovery. It costs about $15US. A WiFi module for it s $40US (and yes, I'm cheap! ;) )

Xbee also looks interesting but again tends to cost more than the microcontroller itself. There are other sort of unbranded wireless products for a lot less $$$. I wonder if any of these would be suitable? For my needs I don't think high bandwidth is needed. I just want to be able to exchange some sensor readings and probably some commands from time to time.

Ability to integrate with existing home automation products would be a plus but again, I'm happy to handle that on the PC side as long as the various parts have some sort of PC integration. For some of these cheap RF devices, I cold dedicate an Arduino if necessary as a communication gateway. Communication with XMPP would probably be nice as that sounds like a good platform for the PC side of this.

What wireless options are folks using for this and what are the tradeoffs? For example, the $40 price for the WiFi adapter includes source code for drivers that would save me a lot of coding time.

Thanks!

I just upgraded to Android Studio and when creating a new empty (Hello World) project, I find I cannot compile. the error message indicates "Cannot find System Java Compiler"

I start Android Studio with the command:
JAVA_HOME=/home/hbarta/Android/jdk1.7.0_51 ~/Android/android-studio/bin/studio.sh
I have also tried exporting the JAVA_HOME variable and that does not help. I do have the JDK installed:

hbarta@cypress:~$$JAVA_HOME/bin/javac
Usage: javac <options> <source files>
.
.
.

Any suggestions on how I can resolve this (or where I should be asking this question) are appreciated!

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Chicken leg quarters for 58 cents a pound at Valli . That's 10 pounds there.
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Angry birds.
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5/8/14
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My new desktop. 

Conky. I had heard the name but never looked into it. In fact, the name turned me off. It turns out it is what makes the panel to the right possible. It is more or less completely configurable. I've set it up with a bunch of statistics for my laptop, mostly. And weather for places important to me.

It inspired me to dig up something to replace the default Linux Mint 16 wallpaper with. This is a sunset on Lake Pepin (Mississippi River just south of Red Wing MN) from November of last year.
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Babies out getting some sun today.
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Happy Cinco de Mayo!
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On the cooling rack at the carniceria. Who could resist!

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