Daikin BRP069/BRP072-class units are WiFi/DHCP with no fixed IP. hvac's backend
runs as a Docker container on its own bridge network (not directly on the LXC's
admin-VLAN NIC), so UDP broadcast discovery risked silently failing to egress —
instead, every unit is identified by MAC (external_ref), and a background poller
periodically HTTP-sweeps the configured subnet CIDR and matches replies by MAC,
self-healing zone_devices.device_ip whenever a lease changes. Only needs plain
outbound HTTP, same path already proven by the MHI Modbus TCP driver.
- lib/drivers/daikin.js: discover()/getStatus()/setTarget() against the local
/common/basic_info + /aircon/get_control_info + /aircon/set_control_info API
(confirmed live against firmware 4_2_303, 2026-08-25). Mode/fan-rate encoding
taken from community reverse-engineering, not yet verified against a live
setTarget() call — flagged in comments for first real control test.
- lib/daikin-poller.js: 60s status poll (cached IP) + 5min subnet resweep
(self-heal IP + auto-register new units, never auto-assigned to a zone).
- lib/device-registry.js: shared discover-upsert, extracted so both the manual
Discover button and the background sweep record device_ip the same way.
- ac-control.js / routes/override.js: daikin-status/daikin-control endpoints
and commandAcDevice() branch, mirroring the existing MHI control path.
- Settings page: new "Daikin subnet (CIDR)" field (daikin_subnet_cidr config
key) — sweeps do nothing until this is set.
- Frontend: DaikinControlPanel.tsx (on/off/mode/setpoint/fan), wired into
ZoneDetailModal; daikin moved from NOT_YET_IMPLEMENTED to a real driver.
Backend node --check and frontend tsc --noEmit both clean.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
jtricerolph
373f66ef5c