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Waveshare RP2040-Lora adventure

  • Post date 2026-01-28
  • Categories Projects
I have for quite some time now been thinking about measuring the water temperature in Lake Vättern. One step on the way was the temperature sensor in the much smaller lake Rocksjön that's located in Jönköping. That was back in 2013-12 years ago-and I have not done anything since then relating to LoRaWAN and temperature sensing. But this summer, I got [...]

Xmas tree upgrades

  • Post date 2025-12-26
  • Categories Random
For several years now I have hade a string of Neopixel RGB Christmas lights in the Christmas tree that was controlled by an old Python script on a Raspberry Pi. Since I would forget how to set it up between Christmases I simply bundled the string and the RPI with the box and just started it up the next year. This year I got some extra Christmas [...]

LED-Scroller with Unicode support

  • Post date 2025-12-18
  • Categories Experiments
I have previously posted texts regarding my adventures in RGB-panel land, first here, and then here. To make the office a bit extra Christmassy this year i decided that I wanted to display some scrolling text (no problem at all) with emoji (great problems). The fonts supported by drivers for these panels have letters, and just the boring ones, not [...]

Alertsquarer v1.1

  • Post date 2023-12-01
  • Categories Projects
During this latest DreamHack event here in Jönköping (DHW23) I did some small updates to the Alertsquarer previously featured here. SG had bought some new hardware so instead of three 32x32 panels there was now two 64x32 panels. So while fixing support for this, and doing some minor adjustments I also added support for loading and displaying PNG-images. [...]

AlertSquarer for DH

  • Post date 2023-06-18
  • Categories Projects
A friend who works at Dreamhack asked me if I had any 24 led Neopixel-rings in my large store of good-to-have stuff. Unfortunately I didn't, I could only find 12 led ones. In the crew area for the tech/network crew at Dreamhack in Jönköping they have had a display that show the number of active alerts per team. So anyone easily could see if any area [...]

Raspberry PI case with a fan

  • Post date 2023-03-11
  • Categories Random
I have a Raspberry PI in the boot of my car, and it can get quite warm during the summer months, so it needed some cooling. The problem is that it features a PiJuice, to be able to handle the power being cut as soon as the car is turned off. But I couldn't find any cases that had place for both a fan and pijuice, even if i Googled for at least 30s. [...]