Alt: color codes

Alt: color codes

When Alt is connected to power, the LED displays the current state of the tracker. These states are encoded by a combination of two features: LED color and LED pulse.

Normal states

IndicationDescription
Loading — the first state when Alt is powering up or rebooting: the peripherals are being initialized and the settings are applied.
Idle — waiting for a Task.
Task runningAlt runs a Task: a Tracking task, a Property task, or any other available Task.

Error mode

Alt enters an error mode in case of electronic component failure, missing configuration data, firmware error, or incorrect use.
The error is displayed as a recurring series of colored LED pulses with a 2 second pause between cycles.
The pulse number indicates the number of the subsystem in which the error occurred.
The pulse color indicates the error number within the subsystem.
Error numberColor
0
Lime (0x00, 0xff, 0x00)
1
Red (0xff, 0x00, 0x00)
2
Blue (0x00, 0x00, 0xff)
3
Fuchsia (0xff, 0x00, 0xff)
4
Yellow (0xff, 0xff, 0x00)
5
White (0xff, 0xff, 0xff)
6
Silver (0xc0, 0xc0, 0xc0)
7
Navy (0x00, 0x00, 0x80)
The value of #0 means the absence of error.

Error example

Error #1 in subsystem #1
Error #3 in subsystem #0
Error #4 in subsystem #2

States of the bootloader

Alt enters bootloader mode while updating the firmware or if the firmware is missing or damaged.
IndicationDescription
Normal — the bootloader is ready to work.