Tag: python

An evening spent trying to control Daikin ceiling cassette air conditioners from Home Assistant using a Broadlink RM4 Mini IR blaster. What started as “surely someone has done this” turned into a full reverse engineering session of the DAIKIN200 IR protocol, programmatic code generation, and ultimately hitting a hardware limitation of the Broadlink itself.

It’s been over 8 years since my original analysis of Hong Kong pollution data. Time for an update! Has air quality improved? What trends can we observe now with almost 27 years of data (1998-2025)?