Restarting an ESP32 via Telegram
Whoops, quite a long time with no posts! Apologies for that, but it’s been a busier-than-usual year at Haaga-Helia UAS … More Restarting an ESP32 via Telegram
All articles by Heikki Hietala
GPS-equipped portable atmospheric recorder, with LCD and map display
NOTE – all code you see here is in better, complete form at my GitHub page. As I have returned … More GPS-equipped portable atmospheric recorder, with LCD and map display
Spotify song display with ESP32 and e-paper display
One day, entirely without active pleading on my part, I was handed an Amazon Echo Dot device. I wasn’t aware … More Spotify song display with ESP32 and e-paper display
Time Management Cube
So, this academic year is already well down the road, and I haven’t blogged in a while. To make up … More Time Management Cube
Video insert length indicator with large LED segment displays and ESP32
As it happens, Haaga-Helia University of Applied Sciences has a full-fledged studio for our communication students and other needs related … More Video insert length indicator with large LED segment displays and ESP32
Humidity and temperature data on IoT
It’s been a while since my last post, apologies for that. It must be that the corona restrictions also make … More Humidity and temperature data on IoT
Home made large 7 segment LED display
As you may recall, I had a post on the large (10 cm or 4″) 7 segment display earlier, when … More Home made large 7 segment LED display
Back in business with the Seeedstudio Grove Arduino kit
Hi all, it’s time to return to the mines and start delving for more fun and educational Arduino stuff! In … More Back in business with the Seeedstudio Grove Arduino kit
Documentation images for the Kotokino Mark IV scanner
I was asked to provide more detailed images of the Kotokino Mark IV telecine machine, so I shot a dozen … More Documentation images for the Kotokino Mark IV scanner
The Donald Duck hypnotizing machine with IoT
Note – the full code is available on my GitHub page, so I will only illustrate portions of it here. … More The Donald Duck hypnotizing machine with IoT