Reverse-engineered UART protocol for an ACiQ K18W mini split (TCL WBR1 dongle, CN-16). 115200 8N1 with 0xA5 framing - not TCL tclac, not Midea, not Tuya. ESPHome node with a verified Home Assistant climate entity: listen-only, or replace the dongle for local control with no cloud.
protocol reverse-engineering tcl home-assistant uart hvac logic-analyzer tuya heat-pump esphome mini-split rtl8720cf aciq wbr1
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Updated
Aug 15, 2026 - Python