Experiments, findings and comments about running Linux on embedded systems.
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Sean's Embedded Linux Blog | Experiments, findings and comments about running Linux on embedded systems. | seansembeddedlinux.wordpress.com Reviews
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Experiments, findings and comments about running Linux on embedded systems.
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smachin1000 | Sean's Embedded Linux Blog
https://seansembeddedlinux.wordpress.com/author/smachin1000
Sean's Embedded Linux Blog. Experiments with Linux on embedded boards and data communications, IoT etc. IoT Protocols CoAP – Part 3. Making a Resource Observable. This is quite easy using the TxThings library we’ve been using. Just create the resource as usual, and set the. Property to True. Then, each time you want to broadcast a new state, just call. Unfortunately the TxThings library does not yet have support for being an observer, so the above code can be tested by installing the Copper Plug-in.
Linux Jitter Tests | Sean's Embedded Linux Blog
https://seansembeddedlinux.wordpress.com/2014/06/06/linux-jitter-tests
Sean's Embedded Linux Blog. Experiments with Linux on embedded boards and data communications, IoT etc. Comparing ext3 vs ext4 for SD card root filesystems. Experimenting with MQTT →. Let’s whip up a simple userspace C program to toggle a GPIO line via the sysfs interface and see what the waveform looks like. The code for this is in the file jittertest basic.c on GitHub. Here’s what the wave looks like on the scope:. The video is posted here. Let’s see if we can improve things…. The video is posted here.
Wireless Networking; ZigBee, Thread and the Future | Sean's Embedded Linux Blog
https://seansembeddedlinux.wordpress.com/2015/06/05/wireless-networking-zigbee-thread-and-the-future
Sean's Embedded Linux Blog. Experiments with Linux on embedded boards and data communications, IoT etc. More filesystem performance comparisons – BTRFS →. Wireless Networking; ZigBee, Thread and the Future. In my day job I deal with many 100s of 1000s of deployed devices that communicate using ZigBee. From many months of dealing with problems I see the following problems with these systems:. Lack of interoperability between vendor implementations. Poor performance of large networks. Any type of applicati...
Linux Jitter Tests – Update | Sean's Embedded Linux Blog
https://seansembeddedlinux.wordpress.com/2014/08/10/linux-jitter-tests-update
Sean's Embedded Linux Blog. Experiments with Linux on embedded boards and data communications, IoT etc. Updates coming soon →. Linux Jitter Tests – Update. Astute reader Josh Levine pointed me to an article that might explain the remaining jitter seen on the last GPIO toggle experiment I ran, where we set the process to be real-time with SCHED FIFO. The lwn.net article. When I get back in the lab I’ll try this out on the existing code. Thanks Josh for the info! Leave a Reply Cancel reply.
Experimenting with MQTT | Sean's Embedded Linux Blog
https://seansembeddedlinux.wordpress.com/2014/06/26/experimenting-with-mqtt
Sean's Embedded Linux Blog. Experiments with Linux on embedded boards and data communications, IoT etc. Linux Jitter Tests – Update →. Lately I’ve been experimenting with MQTT, a lightweight publish-subscribe protocol. It’s designed to be a minimal overhead messaging system for applications like IoT data transfer. It supports a QOS setting that allows you to minimize the no. of acknowledgements sent. The QOS levels defined are:. 0 – Fire and forget. 1 – Deliver at least once. Python mqtt client.py. Recei...
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Home - Machin Engineering
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Welcome to Machin Engineering. Provider of customized embedded products and solutions since 2004. The IStar GPS is facilitating telemetry for this year's America's Cup race in San Francisco. See the full story in IEEE Spectrum. Check out my new Embedded Linux Blog. C) 2004-2016 Machin Engineering.
Hello Swift!
http://masteringios.com/blog/2014/06/26/hello-swift
A developer's search for code greatness. June 26, 2014. 1 Comment ↓. When learning a new programming language you usually start from “Hello World! 8221; Apple provided a great book. For Swift and that starts precisely with “Hello World! However, that’s not very exciting and also it’s not an app. So instead of printing “Hello World! 8221; to the console, let’s create an app using only Swift, that allows you to enter a name, press a button and see a nice greeting on the screen. When opening the storyboard ...
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seansembeddedlinux.wordpress.com
Sean's Embedded Linux Blog | Experiments, findings and comments about running Linux on embedded systems.
Sean's Embedded Linux Blog. Experiments, findings and comments about running Linux on embedded systems. More filesystem performance comparisons – BTRFS. Earlier on I had benchmarked the performance of ext3 vs ext4 on my ARM HF Linux system. This time I will add benchmarks for the root filesystem running BTRFS with lzo compression. Using the seeker program from earlier, the results are:. Seeker v2.0, 2007-01-15, http:/ www.linuxinsight.com/how fast is your disk.html. Average of 5 runs. 1000 0 records in.
Sean Semidey | Front End Web Developer
Hello my name is Sean Semidey. And I am a Front-End Web Developer and UI/UX guru. I study Interactive Digital Media at Drexel University. Located in the beautiful city of Philadelphia, PA. Te amo Front End Web development! It's dangerous to go alone". Hire me for your next adventure! J'adore mobile app development! An iOS app developed in conjunction with the Attic Youth Center. The goal of this app is to normalize the conversations around HIV in the LGBT youth community.
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Sean Schouten English 1010
Sean Schouten English 1010. Tuesday, October 26, 2010. 1 I know that bagless vacuums are popular and preferred by most people, even though they are messier and require more maintenance. They also don’t filter as well and the motors don’t last as long as bagged models. 2 Why are bagless vacuums preferred among most of the population? Also do most people know that they don’t filter as well and do actually require more maintenance? 7 Wed, Oct 27: Appointments to speak with vacuum store owners. Also meet...
Wallace Portrait Photography
Tuesday, September 30, 2008. Welcome to Sean's Senior Photos. After successfully photographing a handful of my graduating family members, I have started receiving requests to expand my clientele. Due to my busy schedule, a universal website including prices, portfolios, etc, would save both potential patrons and myself a lot of time. Subscribe to: Posts (Atom). Welcome to Seans Senior Photos. I am a recent graduate of Kendall College of Art and Design, majoring in traditional illustration. I enjoy a ...
