LED Status

The RGB LED (connected to pin 25) provides visual feedback for both Bluetooth Low Energy (BLE) connection status and machine operational status.

Status Priority

Machine operational status takes priority over BLE status:

1. Homing (highest priority) - Deep purple breathing effect

2. BLE Status (lower priority) - When machine is idle

Machine Status Indications

When Machine is Homing

• Deep purple breathing effect - Smooth breathing pattern

• Continues until homing is complete or fails

BLE Status Indications

When BLE Advertising (looking for connections)

1. Rainbow effect - 1 second

2. Fast breathing blue - Rapid breathing effect in blue color (10x faster), continuously while advertising

3. Auto-dim after 30 seconds - Dims to subtle pulsing at connection level brightness to reduce annoyance

When BLE Connected

1. Rainbow effect - 1 second

2. Fade to dim - Blue LED fades to a low dim level (~12% brightness) and stays dimmed

3. Communication pulses - Subtle brightness increases during BLE communication (send/receive)

When BLE Disconnected

• LED Off - No light

Advertising Timeout Feature

To reduce visual distraction for users with wired remotes, the LED automatically dims after 30 seconds of advertising:

• First 30 seconds: Bright fast pulsing blue (easily visible when searching for device)

• After 30 seconds: Dims to connection-level brightness (~12%) with gentle pulsing

• Purpose: Maintains indication that BLE is available while reducing annoyance

• Reset: Returns to bright pulsing if BLE connection status changes

Communication Indication

When BLE is connected and dimmed, the LED will briefly pulse brighter during:

• Receiving commands from connected device

• Sending responses back to connected device

• State updates sent to connected device

The communication pulse is a subtle 100ms fade with minimal brightness increase.

Technical Notes

• Advertising timeout: Controlled by ADVERTISING_TIMEOUT constant (30 seconds)

• Dimmed advertising: Uses showBLEAdvertisingDimmed() function with gentle pulsing range

• Auto-reset: Timeout resets when BLE status changes (connect/disconnect)