added serial docs
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@ -69,7 +69,11 @@ When your micro:bit isn’t connected to your computer, tablet or mobile, you wi
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The pins labelled 3V and GND are the power supply pins.
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You can attach an external device such as a motor to these and power it using the battery or USB.
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### Bluetooth Low Energy Antenna
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### Serial Communication
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The BBC micro:bit can send an receive data via [serial communication](/device/serial). The serial data can be transfered via USB or BlE.
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### Bluetooth Low Energy (BLE) Antenna
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You will see the label BLE ANNTENA on the back of your micro:bit. It is for a messaging service,
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so that devices can talk to each other. The micro:bit is a peripheral
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