Zigbee ⁽²⁾

Tonight none of the outdoor automated lights came on. On further testing the internal lights also refused to work. Odd, everything was just fine yesterday. I use Zigbee devices around the house with four devices controlling various outdoor lighting, two controlling dimmable internal lights and several devices reporting on room and heating temperatures. Two outdoor lights are all-in-one Zigbee bulbs, the others are diminutive units in various electrical boxes. All use 2.4Ghz Zigbee and all the lighting controllers are also Zigbee repeaters and so form a mesh. The whole lot is controlled by a Raspberry Pi with a Zigbee dongle, zigbee2mqtt, mosquitto and homebridge. This also integrates it into the apple stuff so everything can be controlled from the Apple Home app and/or Siri. Of coure the downside is there are few physical switches now so this was a problem I had to fix. I had no clue what was wrong. Rebooting made no difference. But a bit of searching suggested that USB3 devices can cause issues at 2.4Ghz. Remember from my previous post that I had attached a SSD to the server? Well, that alone made no difference but was a precursor to the issue. Today I had inadvertently…

After a life in IT you'd think I would be better at this stuff. Two things caught me out this week, both around the web server that runs this blog among other things. The first knocked it offline and I was unaware. The server is a dimimutive Lenovo ThinkCentre M92p and has 4 USB ports but none work which was annoying as I wanted to upgrade Lubuntu but really wanted a decent backup to an external device first. I had another of these systems with working USB ports so I swapped the hard disk between the two - the specs are essentially the same. All went well, apparently. I attached a USB SDD to use as a backup for the pending operating system upgrade. Then I noticed no incoming email plus I tried to access the blog from an external IP and it failed. Odd. No issues with accessing from the house LAN. Then I remembered having an issue with the PlusNet router but could not remember what so I logged into that to see if my memory would return. And it did. The PlusNet router helpfully follows MAC addresses rather than IP addresses so when I swapped the HDD…