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example/spp_and_le_counter: set 'BR/EDR not supported' flag and explain why

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Matthias Ringwald 2016-06-10 11:13:07 +02:00
parent 65724832b5
commit deb7dd4954
1 changed files with 8 additions and 4 deletions
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12
example/spp_and_le_counter.c
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@ -75,12 +75,16 @@ static btstack_packet_callback_registration_t hci_event_callback_registration;
* @section Advertisements * @section Advertisements
* *
* @text The Flags attribute in the Advertisement Data indicates if a device is in dual-mode or not. * @text The Flags attribute in the Advertisement Data indicates if a device is in dual-mode or not.
* Flag 0x02 indicates LE General Discoverable, Dual-Mode device. See Listing advertisements. * Flag 0x06 indicates LE General Discoverable, BR/EDR not supported although we're actually using BR/EDR.
* In the past, there have been problems with Anrdoid devices when the flag was not set.
* Setting it should prevent the remote implementation to try to use GATT over LE/EDR, which is not
* implemented by BTstack. So, setting the flag seems like the safer choice (while it's technically incorrect).
*/ */
/* LISTING_START(advertisements): Advertisement data: Flag 0x02 indicates a dual mode device */ /* LISTING_START(advertisements): Advertisement data: Flag 0x06 indicates LE-only device */
const uint8_t adv_data[] = { const uint8_t adv_data[] = {
// Flags: General Discoverable // Flags general discoverable, BR/EDR not supported
0x02, 0x01, 0x02, 0x02, 0x01, 0x06,
// Name // Name
0x0b, 0x09, 'L', 'E', ' ', 'C', 'o', 'u', 'n', 't', 'e', 'r', 0x0b, 0x09, 'L', 'E', ' ', 'C', 'o', 'u', 'n', 't', 'e', 'r',
}; };