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I can a simple bluetooth module receive and transmit data at the same time? Or will it require a secondary antennta or even another bluetooth chip?

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  • \$\begingroup\$ Not sure you can, but is it really necessary? \$\endgroup\$ – iQt Dec 23 '13 at 23:30
  • \$\begingroup\$ Are you looking for some kind of self-diagnosis mode? \$\endgroup\$ – Andy aka Dec 23 '13 at 23:32
  • \$\begingroup\$ I am thinking of a real time fast bluetooth relay. \$\endgroup\$ – KingsInnerSoul Dec 23 '13 at 23:33
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The term you are looking for is “full-duplex”.

“Bluetooth technology provides the effect of full duplex transmission through the use of a time-division duplex (TDD) scheme.”

https://developer.bluetooth.org/TechnologyOverview/Pages/OverviewOfOperations.aspx

[Edit: since it gives you the effect of full-duplex you don't need a second antenna/module.]

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