/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define BTSTACK_FILE__ "gatt_battery_query.c"
// *****************************************************************************
/* EXAMPLE_START(gatt_battery_query): GATT Battery Client
*
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "btstack.h"
// gatt_battery_query.gatt contains the declaration of the provided GATT Services + Characteristics
// gatt_battery_query.h contains the binary representation of gatt_battery_query.gatt
// it is generated by the build system by calling: $BTSTACK_ROOT/tool/compile_gatt.py gatt_battery_query.gatt gatt_battery_query.h
// it needs to be regenerated when the GATT Database declared in gatt_battery_query.gatt file is modified
#include "gatt_battery_query.h"
typedef struct advertising_report {
uint8_t type;
uint8_t event_type;
uint8_t address_type;
bd_addr_t address;
uint8_t rssi;
uint8_t length;
const uint8_t * data;
} advertising_report_t;
static enum {
APP_STATE_IDLE,
APP_STATE_W4_SCAN_RESULT,
APP_STATE_W4_CONNECT,
APP_STATE_CONNECTED
} app_state;
static int blacklist_index = 0;
static bd_addr_t blacklist[20];
static advertising_report_t report;
static hci_con_handle_t connection_handle;
static uint16_t battery_service_cid;
static bd_addr_t cmdline_addr;
static int cmdline_addr_found = 0;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static int blacklist_size(void){
return sizeof(blacklist) / sizeof(bd_addr_t);
}
static int blacklist_contains(bd_addr_t addr){
int i;
for (i=0; i<blacklist_size(); i++){
if (bd_addr_cmp(addr, blacklist[i]) == 0) return 1;
}
return 0;
}
static void add_to_blacklist(bd_addr_t addr){
printf("%s added to blacklist (no battery service found).\n", bd_addr_to_str(addr));
bd_addr_copy(blacklist[blacklist_index], addr);
blacklist_index = (blacklist_index + 1) % blacklist_size();
}
static void dump_advertising_report(uint8_t *packet){
bd_addr_t address;
gap_event_advertising_report_get_address(packet, address);
printf(" * adv. event: evt-type %u, addr-type %u, addr %s, rssi %u, length adv %u, data: ",
gap_event_advertising_report_get_advertising_event_type(packet),
gap_event_advertising_report_get_address_type(packet),
bd_addr_to_str(address),
gap_event_advertising_report_get_rssi(packet),
gap_event_advertising_report_get_data_length(packet));
printf_hexdump(gap_event_advertising_report_get_data(packet), gap_event_advertising_report_get_data_length(packet));
}
static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(packet_type);
UNUSED(channel);
UNUSED(size);
uint8_t status;
uint8_t att_status;
if (hci_event_packet_get_type(packet) != HCI_EVENT_GATTSERVICE_META){
return;
}
switch (hci_event_gattservice_meta_get_subevent_code(packet)){
case GATTSERVICE_SUBEVENT_BATTERY_SERVICE_CONNECTED:
status = gattservice_subevent_battery_service_connected_get_status(packet);
switch (status){
case ERROR_CODE_SUCCESS:
printf("Battery service client connected, found %d services, poll bitmap 0x%02x\n",
gattservice_subevent_battery_service_connected_get_num_instances(packet),
gattservice_subevent_battery_service_connected_get_poll_bitmap(packet));
break;
default:
printf("Battery service client connection failed, err 0x%02x.\n", status);
add_to_blacklist(report.address);
gap_disconnect(connection_handle);
break;
}
break;
case GATTSERVICE_SUBEVENT_BATTERY_SERVICE_LEVEL:
att_status = gattservice_subevent_battery_service_level_get_att_status(packet);
if (att_status != ATT_ERROR_SUCCESS){
printf("Battery level read failed, ATT Error 0x%02x\n", att_status);
} else {
printf("Service index: %d, Battery level: %d\n",
gattservice_subevent_battery_service_level_get_sevice_index(packet),
gattservice_subevent_battery_service_level_get_level(packet));
}
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);
uint8_t status;
bd_addr_t address;
if (packet_type != HCI_EVENT_PACKET){
return;
}
switch (hci_event_packet_get_type(packet)) {
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));
app_state = APP_STATE_W4_CONNECT;
gap_connect(cmdline_addr, 0);
break;
}
printf("Start scanning!\n");
app_state = APP_STATE_W4_SCAN_RESULT;
gap_set_scan_parameters(0,0x0030, 0x0030);
gap_start_scan();
break;
case GAP_EVENT_ADVERTISING_REPORT:
if (app_state != APP_STATE_W4_SCAN_RESULT) return;
gap_event_advertising_report_get_address(packet, address);
if (blacklist_contains(address)) {
break;
}
dump_advertising_report(packet);
// stop scanning, and connect to the device
app_state = APP_STATE_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 (app_state != APP_STATE_W4_CONNECT) return;
connection_handle = hci_subevent_le_connection_complete_get_connection_handle(packet);
status = battery_service_client_connect(connection_handle, handle_gatt_client_event, 2000, &battery_service_cid);
btstack_assert(status == ERROR_CODE_SUCCESS);
app_state = APP_STATE_CONNECTED;
printf("Battery service connected.\n");
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
connection_handle = HCI_CON_HANDLE_INVALID;
// Disconnect battery service
battery_service_client_disconnect(battery_service_cid);
if (cmdline_addr_found){
printf("Disconnected %s\n", bd_addr_to_str(cmdline_addr));
return;
}
printf("Disconnected %s\n", bd_addr_to_str(report.address));
printf("Restart scan.\n");
app_state = APP_STATE_W4_SCAN_RESULT;
gap_start_scan();
break;
default:
break;
}
}
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
// parse address if command line arguments are provided
int arg = 1;
cmdline_addr_found = 0;
while (arg < argc) {
if(!strcmp(argv[arg], "-a") || !strcmp(argv[arg], "--address")){
arg++;
cmdline_addr_found = sscanf_bd_addr(argv[arg], cmdline_addr);
arg++;
if (!cmdline_addr_found) exit(1);
continue;
}
fprintf(stderr, "\nUsage: %s [-a|--address aa:bb:cc:dd:ee:ff]\n", argv[0]);
fprintf(stderr, "If no argument is provided, GATT browser will start scanning and connect to the first found device.\nTo connect to a specific device use argument [-a].\n\n");
return 0;
}
(void)argv;
l2cap_init();
// setup ATT server - only needed if LE Peripheral does ATT queries on its own, e.g. Android phones
att_server_init(profile_data, NULL, NULL);
// GATT Client setup
gatt_client_init();
battery_service_client_init();
sm_init();
sm_set_io_capabilities(IO_CAPABILITY_NO_INPUT_NO_OUTPUT);
hci_event_callback_registration.callback = &hci_event_handler;
hci_add_event_handler(&hci_event_callback_registration);
app_state = APP_STATE_IDLE;
// turn on!
hci_power_control(HCI_POWER_ON);
return 0;
}
/* EXAMPLE_END */