Serial sensor change state after data has been read

@Dfox97 wrote:

Hello, I am trying to figure out how to change my state back to an untriggered state after my motion sensor has been triggered.
I am currently using the serial sensor platform configuration to read the data arriving to my usb port (my device is a bbc microbit with motion sensor) it works and changes the state to show the data (e.g motion has been triggered) but it will stay at that state forever and I have no way to tell if motion has been triggered again.
I want to do something like, change state to no motion detected after 30 seconds, to stop my state always displaying motion detected.

Currently code I am using is :

#configuration.yaml
sensor:
  - platform: serial
    serial_port: /dev/serial/by-id/usb-ARM_BBC_micro:bit_CMSIS-DAP_9901000051864e45003d1008000000240000000097969901-if01
    baudrate: 115200

I then just then impliment Glance card configuration from lovelace and it shows the data on the frontend.
I think I need to use an automation trigger but I’m unsure how to implement a state change after a certain amount of time.
Sorry if this is a stupid question, I am completely new with home assistant and unsure how to do the task.
Any help would be greatly appreciated, thanks for your time.

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