bluetooth pairing signal

i wonder know how signal of bluetooth pairing.

im using arduino uno r3 , bluetooth hc-06

in project, need pairing signal.

is there commander can signal?

i tried use state pin in arduino, when got digital signal state.

just 111,000,11,00 numbers appeared whther bluetooth connected or not.

so couldn't thing it.

please...im suffer problem along whole year...ioi

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