lca2019

This is the third in a set of posts about the home automation tutorial from linux.conf.au 2019. You should probably read part 1 and part 2 before this post. In the end Alistair decided that my home automation shield was defective, which is the cause of the errors from the past post. So I am instead running with the prototype shield that he handed me when I started helping with the tutorial preparation. That shield has some other bugs (misalignments of holes mainly), but is functional apart from that. I have also decided that I'm not super excited by hassos, and just want to run the orangepi with the OWFS to MQTT gateway into my existing home assistant setup if possible, so I am going to focus on getting that bare component working for now. To that end, the gateway can be found at https://github.com/InfernoEmbedded/OWFS-MQTT-Bridge, and is a perl script named ha-daemon.pl. I needed to install some dependancies, which in my case were for armbian: $ apt-get install perl libanyevent-perl cpanminus libdist-zilla-perl libfile-slurp-perl libdatetime-format-strptime-perl $ dzil listdeps | cpanm --sudo Then I needed to write a configuration file and put it at ha.toml in the same directory as the daemon.…

For the actual on-the-day work, delegates were handed a link to these instructions in github. If you're playing along at home, you should probably read 1-Wire home automation tutorial from linux.conf.au 2019, part 1 before attempting the work described here. Its especially important that you know the IP address of your board for example. Relay tweaks The instructions are pretty self explanatory, although I did get confused about where to connect the relay as I couldn't find PC8 in my 40 pin header diagrams. That's because the shields for the tutorial have a separate header which is a bit more convenient: I was also a bit confused when the relay didn't work initially, but that turns out because I'd misunderstood the wiring. The relay needs to be powered from the 3.3v pin on the 40 pin header, as there is a PCB error which puts 5v on the pins labelled as 3.3v on the GPIO header. I ended up with jumper wires which looked like this: 1-Wire issues Following on the tutorial instructions worked well from then on until I tried to get 1-Wire setup. The owfs2mqtt bridge plugin was logging this: 2019-04-08 19:23:55.075: /opt/OWFS-MQTT-Bridge/lib/Daemon/OneWire.pm:148:Daemon::logError(): Connection to owserver failed: Can't connect…

I didn't get much of a chance to work through the home automation tutorial at linux.conf.au 2019 because I ended up helping others in the room get their Orange Pi is booting. Now that things have settled down after the conference, I've had a chance to actually do some of the tutorial myself. These are my notes so I can remember what I did later... Pre-tutorial setup You need to do the pre-tutorial setup first. I use Ubuntu, which means its important that I use 18.10 or greater so that st-link is packaged. Apart from that the instructions as written just worked. You also need to download the image for the SD card, which was provided on the day at the conference. The URL for that is from github. Download that image, decompress it, and then flash it to an SD card using something like Balena Etcher. The tutorial used 32gb SD cards, but the image will fit on something smaller than that. hassos also doesn't put anything on the Orange Pi HDMI port when it boots, so your machine is going to look like it didn't boot. That's expected. For the tutorial we provided a mapping from board number (mac…