Short flash every ~3 s
All good — the connector is paired and connected to Wi-Fi. Colour LED: green flash.
Even blinking: 1 s on, 1 s off
The connector is not paired with the panel — the setup network “HEMS-…” is active (password 1234567890). Generate a pairing code in the panel. Colour LED: yellow.
Fast blinking for ~15 s
Someone clicked “Identify” in the panel to find this connector among others. Colour LED: blue.
Off all the time
The connector is paired but has no Wi-Fi connection — wrong network, weak signal or the router is off. Check the connector list in the panel.
The pattern keeps starting over
The connector is restarting. In the panel, in the connector logs, look for RESET and PANIC entries — they show the stage where the crash happened.

Board	Status LED	Colours
E32 — ESP32 DevKit (ESP32-WROOM-32 / 32D / 32E, ESP32-D0WD-V3 chip)	GPIO2, single colour (usually blue)	on / off only
W32 — ESP32-WROOM-32U	GPIO2, single colour	on / off only
S16 — ESP32-S3-DevKitC-1 N16R8	GPIO48, colour (WS2812)	as S3D
S3D — ESP32-S3 DevKit	GPIO48, colour (WS2812)	green — online, yellow — waiting for pairing, blue — identify
S35 — ESP32-S3-LCD-5, WSH — Waveshare 32154	none	—

During longer operations (connecting to the server, network scan, update) the LED may stay in one state for a few seconds — this is normal.

Na ESP32 DevKitC V4 nie ma diody na GPIO2 — wtedy świeci tylko dioda zasilania. ESP32-S3-LCD-5 (S35) nie ma diody stanu.