自适应跳频的一部分the BLE specification, any bluetooth qualified device should support this feature, including the 580, and the adaptive frequency hopping is applied after a connection is made and not during advertising.
The channel map that includes the preffered channels that the master wants to use is send to the server at the connection request packet at the beggining of a connection, therefore the first channel map is not send after (sorry about the wrong expression) a connection is established, but its included in the connection request of the master and its applied immidiately. Now since the "preffered" channels might change during a connection an LL_CHANNEL_MAP_REQ is send during a connection in order to update that map. After the update has been sent, that packet includes as parameters the new channel map and an Instant that indicates a point in time that new channel map is going to be used, for more information about this you can have a look at the BLE specification.
Hi Sean666,
自适应跳频的一部分the BLE specification, any bluetooth qualified device should support this feature, including the 580, and the adaptive frequency hopping is applied after a connection is made and not during advertising.
Thanks MT_dialog
Dear MT_dialog
After connecting, is the frequency map updated instantly?
Regards,
Sean
Hi Sean666,
The channel map that includes the preffered channels that the master wants to use is send to the server at the connection request packet at the beggining of a connection, therefore the first channel map is not send after (sorry about the wrong expression) a connection is established, but its included in the connection request of the master and its applied immidiately. Now since the "preffered" channels might change during a connection an LL_CHANNEL_MAP_REQ is send during a connection in order to update that map. After the update has been sent, that packet includes as parameters the new channel map and an Instant that indicates a point in time that new channel map is going to be used, for more information about this you can have a look at the BLE specification.
Thanks MT_dialog