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# Sample applications
## advertiser
This is the simplest example of advertising. Application sets NRPA, configures
advertisement parameters: general discoverable and not connectable and fills
advertisement fields. Transmited data contains only flags, tx power level and
device name, which fits in 31B limit of single package. With this data set,
device advertises for 10 seconds, terminates advertisement and repeats process
again infinitely.
## scanner
This application shows how to perform simple scan. Device performs discovery
procedure, during which receives advertising reports (if any devices are
advertising nearby). These reports are being parsed and results are printed to
serial port. Applicaton starts new discovery every second.
## peripheral
Peripheral application is based on advertiser, but has added capability of
connecting with other devices. As peripheral, device doesn't initiate any
connection by itself; instead, advertises infinitely and accepts any connection
request it receives. Because we cannot use any 16 or 32 bit UUIDs, as these are
reserved by Bluetooth SIG, we are forced to use 128-bit one. Including such
long UUID in advertising data consumes large part of available payload, so this
data is split in advertising data and response data.
## central
This application works in pair with peripheral. It's based on scanner
application - the difference is, that if there was detected device with UUID
fitting to the one predefined in central application, connection is initiated.
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