Writing an ESP32 Bluetooth Printer Driver In Two Acts
https://hackaday.com/2026/09/14/writing-an-esp32-bluetooth-printer-driver-in-two-acts/

[Bas BotBerg] wanted to use a portable Bluetooth thermal printer to run off reports on sensor data collected by an ESP32-C3 microcontroller. But as is so often the case these …read more (https://hackaday.com/2026/09/14/writing-an-esp32-bluetooth-printer-driver-in-two-acts/)

An Open Heart Rate Monitor
https://hackaday.com/2026/09/14/an-open-heart-rate-monitor/

If you spend any time near a gym, you may be familiar with Bluetooth heart rate monitors — a small pack of electronics mounted on a strap round the chest …read more (https://hackaday.com/2026/09/14/an-open-heart-rate-monitor/)

Fixing a Ubiquiti 16-Port PoE Switch With an Extra Hole
https://hackaday.com/2026/09/15/fixing-a-ubiquiti-16-port-poe-switch-with-an-extra-hole/

After saving a £300, 16-port Ubiquiti network switch from getting tossed into the trash, [Buy It Fix It] got the honor of trying to repair it. With four ports and …read more (https://hackaday.com/2026/09/15/fixing-a-ubiquiti-16-port-poe-switch-with-an-extra-hole/)

Every ZX81 Expansion Card You Ever Wanted, All At Once
https://hackaday.com/2026/09/15/every-zx81-expansion-card-you-ever-wanted-all-at-once/

The Sinclair ZX81 was a masterpiece of Sir Clive’s desire to get the most out of the least hardware, being about as minimalist as it was possible to get and …read more (https://hackaday.com/2026/09/15/every-zx81-expansion-card-you-ever-wanted-all-at-once/)

Linux Fu: Speak Up!
https://hackaday.com/2026/09/15/linux-fu-speak-up/

Apparently, people hate typing. As every movie and TV show suggests, the future is talking to computers. There was a time when speech recognition was complex and not very good. …read more (https://hackaday.com/2026/09/15/linux-fu-speak-up/)

Running Linux 6.11 on the ESP32-S3 with a Few Tweaks
https://hackaday.com/2026/09/15/running-linux-6-11-on-the-esp32-s3-with-a-few-tweaks/

With the Xtensa Lx7 twin CPU cores in the ESP32-S3 running at a relatively zippy 240 MHz and accompanying PSRAM of up to 16 MB, you might find yourself wondering …read more (https://hackaday.com/2026/09/15/running-linux-6-11-on-the-esp32-s3-with-a-few-tweaks/)

Hackaday Europe 2026: Bare Metal Made Easy
https://hackaday.com/2026/09/15/hackaday-europe-2026-bare-metal-made-easy/