Setting GPIO LED state

Wanting to attach external LED, connect via GPIO, when sensor value exceeds threshold, turn on LED 5 second

Is this the correct function ? 



  • Why not use the LED that is already on board?

  • The user will be wearing board in case.. and was thinking I'd like to be able to have LED to signal user, attached to brim/edge of hat or maybe safety glasses.. in their peripheral vision..

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