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example/le_streamer_client: unregister from notifications, reconnect after disconnect

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This commit is contained in:
Matthias Ringwald 2017-07-14 12:33:08 +02:00
parent 1f734b5f46
commit 44a1ebc025
1 changed files with 25 additions and 12 deletions
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37
example/le_streamer_client.c
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@ -73,7 +73,8 @@ static uint8_t le_streamer_characteristic_uuid[16] = { 0x00, 0x00, 0xFF, 0x11, 0
static gatt_client_service_t le_streamer_service;
static gatt_client_characteristic_t le_streamer_characteristic;
static gatt_client_notification_t notification_registration;
static gatt_client_notification_t notification_listener;
static int listener_registered;
static gc_state_t state = TC_IDLE;
static btstack_packet_callback_registration_t hci_event_callback_registration;
@ -148,7 +149,8 @@ static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint
break;
}
// register handler for notifications
gatt_client_listen_for_characteristic_value_updates(&notification_registration, handle_gatt_client_event, connection_handle, &le_streamer_characteristic);
listener_registered = 1;
gatt_client_listen_for_characteristic_value_updates(&notification_listener, handle_gatt_client_event, connection_handle, &le_streamer_characteristic);
// enable notifications
state = TC_W4_TEST_DATA;
printf("Start streaming - enable notify on test characteristic.\n");
@ -179,6 +181,20 @@ static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint
}
// Either connect to remote specified on command line or start scan for device with "LE Streamer" in advertisement
static void le_streamer_client_start(void){
if (cmdline_addr_found){
printf("Connect to %s\n", bd_addr_to_str(cmdline_addr));
state = TC_W4_CONNECT;
gap_connect(cmdline_addr, 0);
} else {
printf("Start scanning!\n");
state = TC_W4_SCAN_RESULT;
gap_set_scan_parameters(0,0x0030, 0x0030);
gap_start_scan();
}
}
static void hci_event_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
@ -191,16 +207,7 @@ static void hci_event_handler(uint8_t packet_type, uint16_t channel, uint8_t *pa
case BTSTACK_EVENT_STATE:
// BTstack activated, get started
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) break;
if (cmdline_addr_found){
printf("Connect to %s\n", bd_addr_to_str(cmdline_addr));
state = TC_W4_CONNECT;
gap_connect(cmdline_addr, 0);
break;
}
printf("Start scanning!\n");
state = TC_W4_SCAN_RESULT;
gap_set_scan_parameters(0,0x0030, 0x0030);
gap_start_scan();
le_streamer_client_start();
break;
case GAP_EVENT_ADVERTISING_REPORT:
if (state != TC_W4_SCAN_RESULT) return;
@ -231,11 +238,17 @@ static void hci_event_handler(uint8_t packet_type, uint16_t channel, uint8_t *pa
gatt_client_discover_primary_services_by_uuid128(handle_gatt_client_event, connection_handle, le_streamer_service_uuid);
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
// unregister listener
if (listener_registered){
listener_registered = 0;
gatt_client_stop_listening_for_characteristic_value_updates(&notification_listener);
}
if (cmdline_addr_found){
printf("Disconnected %s\n", bd_addr_to_str(cmdline_addr));
return;
}
printf("Disconnected %s\n", bd_addr_to_str(le_streamer_addr));
le_streamer_client_start();
break;
default:
break;