/* LISTING_START(GATTBrowserHCIPacketHandler): Connecting and disconnecting from the GATT client */ static void handle_hci_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); if (packet_type != HCI_EVENT_PACKET) return; advertising_report_t report; uint8_t event = hci_event_packet_get_type(packet); switch (event) { case BTSTACK_EVENT_STATE: // BTstack activated, get started if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) break; if (cmdline_addr_found){ printf("Trying to connect to %s\n", bd_addr_to_str(cmdline_addr)); gap_connect(cmdline_addr, 0); break; } printf("BTstack activated, start scanning!\n"); gap_set_scan_parameters(0,0x0030, 0x0030); gap_start_scan(); break; case GAP_EVENT_ADVERTISING_REPORT: fill_advertising_report_from_packet(&report, packet); dump_advertising_report(&report); // stop scanning, and connect to the device gap_stop_scan(); gap_connect(report.address,report.address_type); break; case HCI_EVENT_LE_META: // wait for connection complete if (hci_event_le_meta_get_subevent_code(packet) != HCI_SUBEVENT_LE_CONNECTION_COMPLETE) break; connection_handler = hci_subevent_le_connection_complete_get_connection_handle(packet); // query primary services gatt_client_discover_primary_services(handle_gatt_client_event, connection_handler); break; case HCI_EVENT_DISCONNECTION_COMPLETE: printf("\nGATT browser - DISCONNECTED\n"); break; default: break; } }
// 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){ if (packet_type != HCI_EVENT_PACKET) return; uint8_t event = hci_event_packet_get_type(packet); switch (event) { 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(); break; case GAP_EVENT_ADVERTISING_REPORT: if (state != TC_W4_SCAN_RESULT) return; fill_advertising_report_from_packet(&report, packet); if (blacklist_contains(report.address)) { break; } dump_advertising_report(&report); // stop scanning, and connect to the device state = TC_W4_CONNECT; gap_stop_scan(); printf("Stop scan. Connect to device with addr %s.\n", bd_addr_to_str(report.address)); gap_connect(report.address,report.address_type); break; case HCI_EVENT_LE_META: // wait for connection complete if (hci_event_le_meta_get_subevent_code(packet) != HCI_SUBEVENT_LE_CONNECTION_COMPLETE) break; if (state != TC_W4_CONNECT) return; connection_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); // initialize gatt client context with handle, and add it to the list of active clients // query primary services printf("\nSearch for battery service.\n"); state = TC_W4_SERVICE_RESULT; gatt_client_discover_primary_services_by_uuid16(handle_gatt_client_event, connection_handle, battery_service_uuid); break; case HCI_EVENT_DISCONNECTION_COMPLETE: if (cmdline_addr_found){ printf("\nDisconnected %s\n", bd_addr_to_str(cmdline_addr)); exit(0); } printf("\nDisconnected %s\n", bd_addr_to_str(report.address)); printf("Restart scan.\n"); state = TC_W4_SCAN_RESULT; gap_start_scan(); break; default: break; } }
static void hci_event_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); if (packet_type != HCI_EVENT_PACKET) return; uint16_t conn_interval; uint8_t event = hci_event_packet_get_type(packet); switch (event) { case BTSTACK_EVENT_STATE: // BTstack activated, get started if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING) { le_streamer_client_start(); } else { state = TC_OFF; } break; case GAP_EVENT_ADVERTISING_REPORT: if (state != TC_W4_SCAN_RESULT) return; // check name in advertisement if (!advertisement_report_contains_name("LE Streamer", packet)) return; // store address and type gap_event_advertising_report_get_address(packet, le_streamer_addr); le_streamer_addr_type = gap_event_advertising_report_get_address_type(packet); // stop scanning, and connect to the device state = TC_W4_CONNECT; gap_stop_scan(); printf("Stop scan. Connect to device with addr %s.\n", bd_addr_to_str(le_streamer_addr)); gap_connect(le_streamer_addr,le_streamer_addr_type); break; case HCI_EVENT_LE_META: // wait for connection complete if (hci_event_le_meta_get_subevent_code(packet) != HCI_SUBEVENT_LE_CONNECTION_COMPLETE) break; if (state != TC_W4_CONNECT) return; connection_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); // print connection parameters (without using float operations) conn_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); printf("Connection Interval: %u.%02u ms\n", conn_interval * 125 / 100, 25 * (conn_interval & 3)); printf("Connection Latency: %u\n", hci_subevent_le_connection_complete_get_conn_latency(packet)); // initialize gatt client context with handle, and add it to the list of active clients // query primary services printf("Search for LE Streamer service.\n"); state = TC_W4_SERVICE_RESULT; 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 connection_handle = HCI_CON_HANDLE_INVALID; if (listener_registered){ listener_registered = 0; gatt_client_stop_listening_for_characteristic_value_updates(¬ification_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)); if (state == TC_OFF) break; le_streamer_client_start(); break; default: break; } }