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markdown link fix (#2400)

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Peter Brodersen 2019-09-03 19:17:13 +02:00 committed by Peli de Halleux
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docs/reference/bluetooth/start-uart-service.md
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@ -7,7 +7,7 @@ For another device like a smartphone to use any of the Bluetooth "services" whic
## ~
The Bluetooth UART service allows another device such as a smartphone to exchange any data it wants to with the @boardname@, in small chunks which are intended to be joined together. [UART[(https://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter) stands for Universal Asynchronous Receiver Transmitter and is one way in which serial data communications can be performed, usually between two devices connected by a physical, wired connection. The Bluetooth UART service emulates the behaviour of a physical UART system and allows the exchange of a maximum of 20 bytes of data at a time in either direction.
The Bluetooth UART service allows another device such as a smartphone to exchange any data it wants to with the @boardname@, in small chunks which are intended to be joined together. [UART](https://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter) stands for Universal Asynchronous Receiver Transmitter and is one way in which serial data communications can be performed, usually between two devices connected by a physical, wired connection. The Bluetooth UART service emulates the behaviour of a physical UART system and allows the exchange of a maximum of 20 bytes of data at a time in either direction.
When this service is used, the @boardname@ sets up a 60 byte buffer and data it receives will be accumulated in the buffer until it is full. When using the UART service from your @boardname@ code, you can indicate a special character which will be used to mean that the entire message in at most three chunks has now been sent by the other, connected device, at which point the @boardname@ will release the entire contents of its buffer to any code trying to read it. In other words this special character, known as a 'delimiter' is used by the device connected to the @boardname@ to mean "I've sent my whole message, you can now use it".