Indicator Light

Indicator Light is the binary status pill: on or off, driven by a boolean field, a numeric threshold, or a string match. Use it for e-stop state, mode flags, gripper open/closed, fault flags: anywhere a glance beats reading a number. For the raw value next to the color, Value Display covers similar ground; its Warning/Critical threshold coloring is Pro-only.

Boolean reads the field with plain JS truthiness, clean for std_msgs/Bool topics. Threshold compares a numeric reading against Threshold Value, for “motor temperature above 60 means warning.” String Match checks the incoming string against your String Mappings table for exact equality, useful for enum-style status fields like OK, WARN, FAULT.

• String Match compares values with exact, case-sensitive equality and no trimming. A topic sending ok against a mapping configured for OK falls back to inactive, with nothing in the UI to explain why.
• Boolean mode uses real JS truthiness, not a strict true/false check: a string field holding the text “false” reads as active, since a non-empty string is truthy.
• If Field Pathpoints at a field missing from the message, the light just goes inactive: there's no error state distinguishing a wrong path from a legitimately off value.