Status LED

Status LED

BMSC2MQTT uses a 5 LED WS2812 strip.

Boot

On boot the firmware shows a short white running light and then turns the LEDs off until normal status handling starts.

Status mode

LED mapping:

LED	Meaning
0	WiFi / RSSI
1	BMS status
2	MQTT status
3	Off in status mode
4	Off in status mode

WiFi/RSSI colors:

Color	Meaning
Green	Good signal, roughly better than -60 dBm
Orange	Medium signal, roughly -80 dBm to -60 dBm
Red	Weak signal, roughly below -80 dBm

BMS status:

Color	Meaning
Green	BMS connected / OK
Red	BMS offline or error

MQTT status:

Color	Meaning
Green	MQTT connected
Red	MQTT disconnected

AP mode

In access point mode:

• LED 0 is solid blue.
• MQTT is not evaluated.
• BLE BMS communication is disabled.

SOC mode

When all required states are OK, the strip switches to SOC bar mode after a short delay.

All 5 LEDs are used as a charge bar. Intermediate SOC values can show a partial LED.

SOC colors:

SOC	Color
<= 10%	Red
11% to 30%	Orange
> 30%	Gradient toward green