Neil Hopcroft

A digital misfit

Lilla Rinkeby

Wandering around another part of Kista, next to the nature reserve there is another, quite different, nature reserve. This is a marshy area with a walkway across the swamp to a little birdwatching shelter. The day I was there it had frozen overnight so the walkway was treacherous.

The walkway
Looking back at the science tower from another angle

Lindormsnäs

I thought I’d take advantage of having a car and have a bit of a drive around after dropping A off at the airport. A quick look at the map showed a labyrinth near Bro, so that seemed like a viable destination. However I got a bit distracted on the way there and found myself following signs to Lindormsnäs.

Its a small village on a ness pointing out into Lake Mälaren. I was a little disappointed when I got there how unimportant the lake seems to be to the village, its something at the bottom of the fields, rather than being a central part of character of the place.

A Saab graveyard
Mistletoe

New devboard: ESP32-S3-Touch-LCD-1.69

From time to time I buy myself a little devboard to tinker with, mostly they are ESP32 based these days, there’s a nice ecosystem around them and they work with the Arduino devtools. I’m going to try to record pertinent information about these boards in a place where I can find it again – the internet is a slippery place and things keep moving around and disappearing.

My latest is a ESP32-S3-Touch-LCD-1.69 from Waveshare, I had one with a round screen before, which didn’t work at all, this one has a small square screen similar to those you see on modern cheap ‘smart’ watches. There is no battery, so it isn’t viable as a watch in its own right, but it does have a connector to attach one if you can order one with the right connector. I can’t, it seems.

Waveshare are normally pretty good at documenting their devices:

I don’t have a plan for what to do with this yet – I have been looking for a small screened wifi enabled device, to use as a gauge or readout for some thing, but I’m not sure what yet. I have an epaper device which is suitable for slow moving readouts, not that I’ve found anything to read out yet.

As usual, though, I start out with the demos and examples to make sure I can compile and deploy, it is shipped with the LVGL_Arduino demo installed, and is always reassuring when the shipped software is included as a demo.

All-in-all this is a nice little devboard, but there are still no plans for what to do with it.


Igelbäcken natur reserve

Between Kista and the centre of Stockholm the TBana passes through a nature reserve. This forms a part of the cities green belt, and is marked with a series of paths and cross country tracks, with different colours denoting different distance circuits.

An aerial in Kista
One of the cross country paths
Kista science tower in the distance
An ancient valley
Another cross country track