mirror of
https://github.com/h2zero/esp-nimble-cpp.git
synced 2024-11-23 21:50:55 +01:00
30 lines
1.7 KiB
Markdown
30 lines
1.7 KiB
Markdown
|
# Bluetooth 5.x features
|
||
|
|
|
||
|
|
## About extended advertising
|
||
|
|
Extended advertising allows for much more capability and flexibility.
|
||
|
|
|
||
|
|
* Allows for 251 bytes of advertisement data and up to 1650 bytes when chained (configuration dependant) vs 31.
|
||
|
|
|
||
|
|
* New PHY's (physical layers) that allow for faster data rate (2M PHY) or long range/slower data rates (CODED PHY) as well as the original 1M PHY.
|
||
|
|
|
||
|
|
* New periodic advertising, allowing the scanning device to sync with the advertisements of a beacon. This allows for the scanning device to sleep or perform other tasks before the next expected advertisement is sent, preserving cpu cycles and power (To be implemented).
|
||
|
|
<br>
|
||
|
|
|
||
|
|
## Enabling extended advertising
|
||
|
|
Extended advertising is supported when enabled with the config option `CONFIG_BT_NIMBLE_EXT_ADV` set to a value of 1. This is done in menuconfig under `Component config > Bluetooth > NimBLE options >
|
||
|
|
Enable extended advertising`.
|
||
|
|
|
||
|
|
When enabled the following will occur:
|
||
|
|
* `NimBLEScan::start` method will scan on both the 1M PHY and the coded PHY standards automatically.
|
||
|
|
|
||
|
|
* `NimBLEClient::connect` will use the primary PHY the device is listening on, unless specified (see below).
|
||
|
|
|
||
|
|
* `NimBLEClient::setConnectPhy` becomes available to specify the PHY's to connect with (default is all).
|
||
|
|
|
||
|
|
* `NimBLEAdvertising` is no longer available for use and is replaced by `NimBLEExtAdvertising`. `NimBLEDevice::getAdvertising` will now return an instance of `NimBLEExtAdvertising`.
|
||
|
|
|
||
|
|
* `NimBLEAdvertisementData` is no longer available for use and is replaced by `NimBLEExtAdvertisement`. This new class is where everything about the advertisement is configured, including the advertisement intervals and advertisement ended callback.
|
||
|
|
|
||
|
|
|
||
|
|
|