Case study

Smart-AC-Modernizer: decoding Haier YRW02 infrared control

Smart-AC-Modernizer documents the Haier YRW02 air conditioner's infrared control format and implements an ESP32 bridge for it. The author identifies a 112-bit NEC-variant state packet, captures remote signals with a TSOP4838 receiver, and sends decoded commands through a transistor-driven IR LED.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-08

Stars: 0
Last commit: 2026-02-15
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: ESP32, TSOP4838 receiver, IR LED and 2N2222 transistor.
Prerequisites: Wi-Fi and Blynk credentials are needed for cloud control.
License: MIT License.

Cite

BibTeX

@misc{smart-ac-modernizer-case,
  title = {{Smart-AC-Modernizer: decoding Haier YRW02 infrared control}},
  howpublished = {\url{https://github.com/Smart-real/Smart-AC-Modernizer}},
  url = {https://github.com/Smart-real/Smart-AC-Modernizer},
  urldate = {2026-11-08},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/smart-ac-modernizer-case/}}
}

Plain text

Smart-AC-Modernizer: decoding Haier YRW02 infrared control. https://github.com/Smart-real/Smart-AC-Modernizer (accessed 2026-11-08). Awesome REA entry: https://awesomerea.org/resources/smart-ac-modernizer-case/

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Primary sources

README.md GitHub · Smart-real/Smart-AC-Modernizer · Revision ee89f17