~/log/home-and-appliances/mycoolman-home-assistant

myCOOLMAN for Home Assistant

myCOOLMAN MCMR43 portable fridge/freezer

ai: claude
evidence: public
reviewed: 2026-10-29

The fridge was only controllable from its vendor app. Tom’s integration brings temperature, power, turbo, battery protection and display settings into Home Assistant over Bluetooth, with no cloud and no account.

ai: The creator, an enthusiast rather than a professional programmer, says he built it with a lot of help from Claude. The protocol came from an open-source Android app plus probing the real fridge.
caveats: Confirmed on the MCMR43; other models untested. Battery-voltage scaling is a best guess. It holds a permanent Bluetooth connection, using one of an ESP32 proxy's three slots. Setup needs the fridge's pairing PIN.
evidence: Public repo + creator post.
github: 0 stars, last commit 2026-07-07. As of 2026-11-06. Stars show interest, not safety.

open repo ↗ creator post

Code or detailed materials are published. Says nothing about safety, quality or maintenance. Not tested by unshittify. Added by unshittify. Wrong or out of date? Send a correction.