1.2.0-dev2 LED Patterns

This article explains what action the ML2 Compute Pack's LED patterns signify.

Beltpack LED Patterns

Event	Description
	Powering Up LEDs 1-4 will be all turned on sequentially. LED 1 will turn off. LED 5 will turn on. LEDs 2-5 will turn off sequentially. It’ll be a looping pattern. It’ll be stopped when the icon grid comes up on the wearable. This pattern will also be displayed when the device is in fastboot mode.
	Powering Down LEDS 1-5 will all be on white. LED 5 will turn off, followed by LED 4, then 3 through 1 sequentially.
	Non-compliant Charger LED 3 will blink red thrice, then off for 6 sec. The cycle repeats.
	Charging(compatible/sufficient charger) 0-5%: LED 1 will blink white and red alternatively 6–20%: LED 1 will breathe white, then off for 3 sec. 21–40%: LED 1, 2 will breathe white, then off for 3 sec 41–60%: LED 1-3 will breathe white, then off for 3 sec 61–80%: LED 1-4 will breathe white, then off for 3 sec 81–99%: LED 1-5 will breathe white, then off for 3 sec
	Charging(Insufficient Charger) 0 - 20%: LED 1 will blink red, then off for 3 sec 21–40%: LED 1 will breathe white, 2 in red, then off for 3 sec 41–60%: LED 1-2 will breathe white, 3 in red, then off for 3 sec 61–80%: LED 1-3 will breathe white, 4 in red, then off for 3 sec 81–99%: LED 1-4 will breathe white, 5 in red, then off for 3 sec
	Charging at 100% All 5 LEDs will blink thrice, then off for 3 sec - repeated.
	Battery Status (discharging) 0-5% (critical battery): LED 1 will blink red *The following battery patterns will be displayed in stand-by mode. In a normal discharging scenario, there will be no LED patterns on the Beltpack. 6–20%: LED 1 will blink white slowly in a breathing manner 21–40%: LED 1-2 will blink white slowly in a breathing manner 41–60%: LED 1-3 will blink white slowly in a breathing manner 61–80%: LED 1-4 will blink white slowly in a breathing manner 81–100%: LED 1-5 will blink white slowly in a breathing manner
	Bluetooth Pairing Simultaneously pair of 2 LEDs will turn on blue and will be executed sequentially back and forth: LEDs 1 & 2, then LEDs 2 & 3, then LEDs 3 & 4, then LEDs 4 & 5. Thereafter, the sequence will get reversed: LEDs 4 & 3, then LEDs 3 & 2, then LEDs 2 & 1
	Successful Pairing Blue color. All 5 LEDs will be blue and on for 3 seconds.
	Unsuccessful Pairing All 5 LEDs will be blue and blink red intermittently.
	Updating White color. LED 3 will turn on. LEDs 2 and 4 will turn on and LED 3 will turn off simultaneously. LEDs 1 and 5 will turn on while LEDs 2 and 4 turn off simultaneously. LED 3 will turn on while LEDs 1 and 5 turn off simultaneously.
	Generic Success White color. All 5 LEDs will simultaneously blink white slowly thrice. After the three blinks, there is a gap of 1 second with all 5 LEDs remaining on.
	Generic Failure / Thermal Warning Red Color. All 5 LEDs will simultaneously blink red slowly thrice. After the three blinks, there is a gap of 1 second with all 5 LEDs remaining off.
	Thermal Fault LED 1 & 5 will blink red repeatedly
	Software Failure LED 1 through 3 will blink red repeatedly
	Hardware Failure LED 3 through 5 will blink red repeatedly
	Recovery Mode LED 2 through 4 will blink red repeatedly

Controller LED Patterns

Event	Description
	Bootup The LED will slowly fade in with the color white
	Shut down The LED will slowly fade out
	Sleep The LED will very slowly turn on and off and repeat with the color white
	Critical battery LED will slowly turn on and off while in the color red
	Charging The LED will quickly turn on and off with the color white
	Charging at critical battery level LED color will slowly transition from red to white then jump back to red
	Firmware mismatch / Generic Failure The LED will blink repeatedly with the color red
	Bluetooth pairing LED will slowly turn on and off with the color blue
	Successful pairing LED will remain in blue color without blinking
	Unsuccessful Pairing LED will alternate between blue and red colors