clover/clover/launch/led.launch

<launch>
    <arg name="ws281x" default="true"/>
    <arg name="led_effect" default="true"/>
    <arg name="led_notify" default="true"/>
    <arg name="led_count" default="72"/>
    <arg name="gpio_pin" default="21"/>

    <arg name="simulator" default="false"/>

    <!-- For additional help go to https://clover.coex.tech/led -->

    <!-- ws281x led strip driver -->
    <node pkg="ws281x" name="led" type="ws281x_node" clear_params="true" output="screen" if="$(eval ws281x and not simulator)">
        <param name="led_count" value="$(arg led_count)"/>
        <param name="gpio_pin" value="$(arg gpio_pin)"/>
        <param name="brightness" value="64"/>
        <param name="strip_type" value="WS2811_STRIP_GRB"/>
        <param name="target_frequency" value="800000"/>
        <param name="dma" value="10"/>
        <param name="invert" value="false"/>
    </node>

    <!-- high level led effects control, events notification with leds -->
    <node pkg="clover" name="led_effect" type="led" clear_params="true" output="screen" if="$(arg led_effect)">
        <param name="led" value="led"/>
        <param name="blink_rate" value="2"/>
        <param name="fade_period" value="0.5"/>
        <param name="rainbow_period" value="5"/>
        <!-- events effects table -->
        <rosparam param="notify" if="$(arg led_notify)">
            startup: { r: 255, g: 255, b: 255 }
            connected: { effect: rainbow }
            disconnected: { effect: blink, r: 255, g: 50, b: 50 }
            acro: { r: 245, g: 155, b: 0 }
            stabilized: { r: 30, g: 180, b: 50 }
            altctl: { r: 255, g: 255, b: 40 }
            posctl: { r: 50, g: 100, b: 220 }
            offboard: { r: 220, g: 20, b: 250 }
            low_battery: { threshold: 3.6, effect: blink_fast, r: 255, g: 0, b: 0 }
            error: { effect: flash, r: 255, g: 0, b: 0, ignore: [ "[lpe] vision position timeout" ]}
        </rosparam>
    </node>
</launch>