Use LED to show current state to user

[coderbyheart]

• [ ] Blink LED yellow while searching for cellular connection: https://nordicsemi.atlassian.net/browse/CIA-1269
• [ ] Blinking blue LED while in real-time mode
• [ ] Show user LED color
• [ ] Document LED behaviour

LED state diagram

Source: https://miro.com/app/board/uXjVPN9ZHeQ=/?moveToWidget=3458764593923387145&cot=14

[balaji-nordic]

Tip: Look at the LED implementation of ATv2 in NCS 1.5 (pre-CAF)

[simensrostad]

1.5 is the last release without CAF. led_module

[simensrostad]

The scheduling functionality to queue led patterns is a part of NCS 1.6.0+ so there will have to be mix

[simensrostad]

This is typically how you can queue up led patterns.

    transition_list_clear();
    transition_list_append(LED_STATE_CLOUD_PUBLISHING, 5);
    transition_list_append(LED_STATE_ACTIVE_MODE, 5);
    transition_list_append(LED_STATE_GNSS_SEARCHING, HOLD_FOREVER);
    k_work_reschedule(&led_pattern_update_work, K_NO_WAIT);

[simensrostad]

https://github.com/nrfconnect/sdk-nrf/tree/v1.5-branch/applications/asset_tracker_v2/src/led This is how we can set led patterns, files needed are included in these files

[coderbyheart]

Added the state diagram.