Daily issue / 2026-09-15
Useful things that surfaced in Hacker News discussions on 2026-09-15. Open the context to see why each one caught our attention—or jump straight to the original thread.
What we found
ESP8266/ESP32 firmware connecting Mitsubishi HVAC units to Home Assistant via MQTT.
Source discussion: I added a non-wi-fi Mitsubishi AC to Home Assistant
“I've been using mitsubishi2MQTT with Home Assistant. It's been working great for several years.”
webinar · recommendation · first hand use
Direct HN comment
A local Wi-Fi controller and sensor for Mitsubishi heat pumps and air conditioners.
Source discussion: I added a non-wi-fi Mitsubishi AC to Home Assistant
“A year in, I’m very pleased. Matter or thread would be nice, but these are super straightforward out of the box and totally local.”
nemosaltat · recommendation · first hand use
Direct HN comment
An open ESP32 controller giving Daikin air conditioners local Home Assistant control.
Source discussion: I added a non-wi-fi Mitsubishi AC to Home Assistant
“I use Faikout(ESP32 that controls the heads via the debug port) to control my units from home assistant. Works great!”
damascus_kei · recommendation · first hand use
Direct HN comment
Lightweight wired display glasses that create a large phone or laptop workspace.
Source discussion: Steam Frame starts at $1059
“Been doing this with my wired XREALs for the past few months. They are light enough to be unnoticeable and can display a large monitor when plugged into my phone or computer.”
jjmarr · recommendation · first hand use
Direct HN comment
A tiny pocket e-reader that supports community CrossPoint firmware and KOReader sync.
Source discussion: How my e-reader lost its stripes
“I got an X3 a couple of weeks ago, they are dirt cheap and the form factor is amazing. It's so easy to leave it in the pocket and just pull it out when you have an idle moment somewhere out in public.”
asveikau · recommendation · first hand use
Direct HN comment
A coding harness with driver and read-only navigator modes for tighter pairing.
Source discussion: Ask HN: What are you working on? (September 2026)
“I use it as my daily driver and it's perfect (for me). I recommend everyone should consider writing their own harness.”
philbo · recommendation · author or maintainer
Direct HN comment
An offline Kanban board stored as plain text alongside a Git repository.
Source discussion: Ask HN: What are you working on? (September 2026)
“I'm finding it really good for agentic work these days as, using the kan CLI, agents do really well with it for tracking work and leveraging the board. I'm using it for all my projects these days.”
amterp · recommendation · author or maintainer
Direct HN comment
An account-free PWA with short stretching routines, custom workouts, videos, and timers.
Source discussion: Ask HN: What are you working on? (September 2026)
“Now I use it daily. The app is simple, you have about 100 routines to pick from and you can even build your own from existing exercises.”
nemwiz · recommendation · author or maintainer
Direct HN comment
An interactive atlas visualizing periodic solutions to the three-body problem.
Source discussion: An atlas of periodic solutions to the three-body problem
“It's well organized, the animations are smooth, and it looks beautiful... I'm not sure what to do with the information, but it's mesmerizing and fascinating. Great find!”
mr_mitm · recommendation · evaluated
Direct HN comment
Valentino Braitenberg's thought experiments connecting simple machines to lifelike behavior.
Source discussion: EuroBirdPortal – Live bird movements across Europe
“One of my favorite books is Vehicles: Experiments in Synthetic Psychology.”
lioeters · recommendation · first hand use
Direct HN comment
A shooter where players possess enemy ships and consume their resources.
Source discussion: Spaceships (Reverse Asteroid)
“Enemy Mind is a fun tangential concept where instead of having your own ammo and life, you’re constantly possessing enemy ships and using their resources, before discarding them for the next one.”
latexr · recommendation · first hand use
Direct HN comment
System76's Ubuntu-based Linux distribution with the COSMIC desktop environment.
Source discussion: Microsoft patches Windows and Excel – breaks audio, remote access, and paste
“I use Pop!_OS almost everywhere, but Debian/Ubuntu/Arch with IceWM or Fluxbox (or the like) works great.”
rpdillon · recommendation · first hand use
Direct HN comment