LED Config

Controls the four LEDs on the device. Each LED can be set to ON, OFF, blink, flash, or pulse for a precise duration.

Key path: devcfg.led

{
  "devcfg": {
    "led": {
      "led0": "P100",
      "led1": "S0",
      "led2": "F0",
      "led3": "B0"
    }
  }
}

Note For one-shot LED commands, use the corresponding actions: {"a":"led0","p":"P100"} — see LED actions. The devcfg.led keys set the LED’s state/default directly; prefer the action form for one-off commands to keep behaviour consistent with the rest of the app/actions API.

Physical LED Layout

The four led0–led3 keys do not control four independent LEDs. The device has two physical bi-color LEDs, each with a green and a red channel:

Physical LED	Green channel	Red channel
LED 1	led0	led1
LED 2	led2	led3

Driving both channels of the same physical LED at once (e.g. led0 and led1 both set to the same state) affects that single LED’s apparent color, not two separate indicators. Keep this in mind when designing alert/status patterns.

Verification note The green/red channel mapping above (LED1 = led0/led1, LED2 = led2/led3) was confirmed by physical hardware testing. If you’re updating firmware or DV logic that assumes independent LEDs, confirm this mapping still holds for your hardware revision.

led0

LED 0 behaviour (LED 1, green channel).

Configuration variables

• Type: string (LED command)
• Default: "P100"

Code	Meaning
S0	Set ON
S1	Set OFF
B1	Blink fast
B0	Blink slow
F1	Flash long
F0	Flash short
P + number	Pulse for number × 10 ms (e.g., P100 = 1 s)

led1

LED 1 behaviour (LED 1, red channel). Same command syntax as led0 — see the discrepancy note above.

Configuration variables

• Type: string (LED command)
• Default: "S1" (OFF)

{ "devcfg": { "led": { "led1": "B0" } } }

led2

LED 2 behaviour (LED 2, green channel). Same command syntax as led0 — see the discrepancy note above.

Configuration variables

• Type: string (LED command)
• Default: "F0"

{ "devcfg": { "led": { "led2": "P50" } } }

led3

LED 3 behaviour (LED 2, red channel). Same command syntax as led0 — see the discrepancy note above.

Configuration variables

• Type: string (LED command)
• Default: "B0"

{ "devcfg": { "led": { "led3": "S1" } } }

Related

• App Actions — led0‑led3 actions
• Alert Config — alert flash behaviour