Systemd timers replacement for cron jobs, plus Weechat LetsEncrypt certificate renewal and distribution.

Systemd is here.  Like it or not, we’re being given a new tool and it’s time to learn how to use it.  Today, we address the systemd timers feature and it’s ability to implement the functions of cron. This isn’t a beginner topic, this blog assumes you know the command line well and have at […]

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Tortellini Carbonara

This is my own creation, it isn’t intended to be an authentic Italian-style Carbonara but more of an Italian inspired dish. Choose an interesting sausage that you can showcase in this dish.  I prefer to avoid sharp flavors like apple and a cheese sausage would just get lost. Ingredients: 1 pkg. Tortellini 3 to 5 […]

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Speeding up the ADC on an Arduino ATMega 328P

This is a continuation of the performance enhancements for reading the ADC on Arduino.  Similar steps apply to many non Arduino/ATMega processors. That other article is here: Arduino Library Functions & Macros and introduces startSample(), sampleDone(), and getSampleResult() as a way of avoiding blocking when doing an analogRead.  Here we will update the second two functions and introduce a new function: startFreeRunningADC(). […]

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Installing GCC-arm for use with Nordic nRF8122 nRF5_SDK_11.0.0_89a8197

So, this is really just my notes for installing it again next time.  If it helps, great. Per Nordic’s documentation/release_notes.txt, the library is compiled using a slightly older version so we’ll stick to that here. cd ~/Downloads wget “http://launchpad.net/gcc-arm-embedded/5.0/5-2015-q1-major/+download/gcc-arm-none-eabi-4_9-2015q1-20150306-linux.tar.bz2” sudo bash cd /usr/local/ tar -xjvf /home/user/Downloads/gcc-arm-none-eabi-4_9-2015q1-20150306-linux.tar.bz2 That’s it. Installing the Library is equally easy: cd […]

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