mirror of
https://github.com/zephyrproject-rtos/zephyr
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407b49b35c
Using find_package to locate Zephyr.
Old behavior was to use $ENV{ZEPHYR_BASE} for inclusion of boiler plate
code.
Whenever an automatic run of CMake happend by the build system / IDE
then it was required that ZEPHYR_BASE was defined.
Using ZEPHYR_BASE only to locate the Zephyr package allows CMake to
cache the base variable and thus allowing subsequent invocation even
if ZEPHYR_BASE is not set in the environment.
It also removes the risk of strange build results if a user switchs
between different Zephyr based project folders and forgetting to reset
ZEPHYR_BASE before running ninja / make.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
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| CMakeLists.txt | ||
| prj.conf | ||
| README.rst | ||
| sample.yaml | ||
.. _bluetooth-hci-pwr-ctrl-sample: Bluetooth: HCI Power Control ############################ Overview ******** This sample application demonstrates the dynamic Tx power control over the LL of the BLE controller via Zephyr HCI VS commands. The application implements a peripheral advertising with varying Tx power. The initial advertiser TX power for the first 5s of the application is the Kconfig set default TX power. Then, the TX power variation of the advertiser is a repeatedly descending staircase pattern ranging from -4 dB to -30 dB where the Tx power levels decrease every 5s. Upon sucessful connection, the connection RSSI strength is being monitored and the Tx power of the peripheral device is modulated per connection accordingly such that energy is being saved depending on how powerful the RSSI of the connection is. The peripheral implements a simple GATT profile exposing the HR service notifying connected centrals about a dummy HR each 2s. Requirements ************ * BlueZ running on the host, or * A board with BLE support * A central device & monitor (e.g. nRF Connect) to check the RSSI values obtained from the peripheral. Building and Running ******************** This sample can be found under :zephyr_file:`samples/bluetooth/hci_pwr_ctrl` in the Zephyr tree. See :ref:`bluetooth samples section <bluetooth-samples>` for details.