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btstack/example/hog_boot_host_demo.c

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/*
* Copyright (C) 2020 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 BLUEKITCHEN
* GMBH 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__ "hog_boot_host_demo.c"
/*
* hog_boot_host_demo.c
*/
/* EXAMPLE_START(hog_boot_host_demo): HID Boot Host LE
*
* @text This example implements a minimal HID-over-GATT Boot Host. It scans for LE HID devices, connects to it,
* discovers the Characteristics relevant for the HID Service and enables Notifications on them.
* It then dumps all Boot Keyboard and Mouse Input Reports
*/
#include <inttypes.h>
#include <stdio.h>
#include <btstack_tlv.h>
#include "btstack_config.h"
#include "btstack.h"
// TAG to store remote device address and type in TLV
#define TLV_TAG_HOGD ((((uint32_t) 'H') << 24 ) | (((uint32_t) 'O') << 16) | (((uint32_t) 'G') << 8) | 'D')
typedef struct {
bd_addr_t addr;
bd_addr_type_t addr_type;
} le_device_addr_t;
static enum {
W4_WORKING,
W4_HID_DEVICE_FOUND,
W4_CONNECTED,
W4_ENCRYPTED,
W4_HID_SERVICE_FOUND,
W4_HID_CHARACTERISTICS_FOUND,
W4_BOOT_KEYBOARD_ENABLED,
W4_BOOT_MOUSE_ENABLED,
READY,
W4_TIMEOUT_THEN_SCAN,
W4_TIMEOUT_THEN_RECONNECT,
} app_state;
static le_device_addr_t remote_device;
static hci_con_handle_t connection_handle;
// used for GATT queries
static gatt_client_service_t hid_service;
static gatt_client_characteristic_t protocol_mode_characteristic;
static gatt_client_characteristic_t boot_keyboard_input_characteristic;
static gatt_client_characteristic_t boot_mouse_input_characteristic;
static gatt_client_notification_t keyboard_notifications;
static gatt_client_notification_t mouse_notifications;
// used to implement connection timeout and reconnect timer
static btstack_timer_source_t connection_timer;
// register for events from HCI/GAP and SM
static btstack_packet_callback_registration_t hci_event_callback_registration;
static btstack_packet_callback_registration_t sm_event_callback_registration;
// used to store remote device in TLV
static const btstack_tlv_t * btstack_tlv_singleton_impl;
static void * btstack_tlv_singleton_context;
// Simplified US Keyboard with Shift modifier
#define CHAR_ILLEGAL 0xff
#define CHAR_RETURN '\n'
#define CHAR_ESCAPE 27
#define CHAR_TAB '\t'
#define CHAR_BACKSPACE 0x7f
/**
* English (US)
*/
static const uint8_t keytable_us_none [] = {
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 0-3 */
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', /* 4-13 */
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', /* 14-23 */
'u', 'v', 'w', 'x', 'y', 'z', /* 24-29 */
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', /* 30-39 */
CHAR_RETURN, CHAR_ESCAPE, CHAR_BACKSPACE, CHAR_TAB, ' ', /* 40-44 */
'-', '=', '[', ']', '\\', CHAR_ILLEGAL, ';', '\'', 0x60, ',', /* 45-54 */
'.', '/', CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 55-60 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 61-64 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 65-68 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 69-72 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 73-76 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 77-80 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 81-84 */
'*', '-', '+', '\n', '1', '2', '3', '4', '5', /* 85-97 */
'6', '7', '8', '9', '0', '.', 0xa7, /* 97-100 */
};
static const uint8_t keytable_us_shift[] = {
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 0-3 */
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', /* 4-13 */
'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', /* 14-23 */
'U', 'V', 'W', 'X', 'Y', 'Z', /* 24-29 */
'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', /* 30-39 */
CHAR_RETURN, CHAR_ESCAPE, CHAR_BACKSPACE, CHAR_TAB, ' ', /* 40-44 */
'_', '+', '{', '}', '|', CHAR_ILLEGAL, ':', '"', 0x7E, '<', /* 45-54 */
'>', '?', CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 55-60 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 61-64 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 65-68 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 69-72 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 73-76 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 77-80 */
CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, CHAR_ILLEGAL, /* 81-84 */
'*', '-', '+', '\n', '1', '2', '3', '4', '5', /* 85-97 */
'6', '7', '8', '9', '0', '.', 0xb1, /* 97-100 */
};
/**
* @section HOG Boot Keyboard Handler
* @text Boot Keyboard Input Report contains a report of format
* [ modifier, reserved, 6 x usage for key 1..6 from keyboard usage]
* Track new usages, map key usage to actual character and simulate terminal
*/
/* last_keys stores keyboard report to detect new key down events */
#define NUM_KEYS 6
static uint8_t last_keys[NUM_KEYS];
static void handle_boot_keyboard_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
UNUSED(packet_type);
UNUSED(channel);
UNUSED(size);
if (hci_event_packet_get_type(packet) != GATT_EVENT_NOTIFICATION) return;
const uint8_t * data = gatt_event_notification_get_value(packet);
uint8_t new_keys[NUM_KEYS];
memset(new_keys, 0, sizeof(new_keys));
int new_keys_count = 0;
bool shift = (data[0] & 0x22) != 0;
uint8_t key_index;
for (key_index = 0; key_index < NUM_KEYS; key_index++){
uint8_t usage = data[2 + key_index];
if (usage == 0) continue;
if (usage >= sizeof(keytable_us_none)) continue;
// store new keys
new_keys[new_keys_count++] = usage;
// check if usage was used last time (and ignore in that case)
int i;
for (i=0;i<NUM_KEYS;i++){
if (usage == last_keys[i]){
usage = 0;
}
}
if (usage == 0) continue;
// lookup character based on usage + shift modifier
uint8_t key;
if (shift){
key = keytable_us_shift[usage];
} else {
key = keytable_us_none[usage];
}
if (key == CHAR_ILLEGAL) continue;
if (key == CHAR_BACKSPACE){
printf("\b \b"); // go back one char, print space, go back one char again
continue;
}
printf("%c", key);
}
// store current as last report
memcpy(last_keys, new_keys, NUM_KEYS);
}
/**
* @section HOG Boot Mouse Handler
* @text Boot Mouse Input Report contains a report of format
* [ buttons, dx, dy, dz = scroll wheel]
* Decode packet and print on stdout
*
* @param packet_type
* @param channel
* @param packet
* @param size
*/
static void handle_boot_mouse_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
UNUSED(packet_type);
UNUSED(channel);
UNUSED(size);
if (hci_event_packet_get_type(packet) != GATT_EVENT_NOTIFICATION) return;
const uint8_t * data = gatt_event_notification_get_value(packet);
uint8_t buttons = data[0];
int8_t dx = (int8_t) data[1];
int8_t dy = (int8_t) data[2];
int8_t dwheel = (int8_t) data[3];
printf("Mouse: %i, %i - wheel %i - buttons 0x%02x\n", dx, dy, dwheel, buttons);
}
/**
* @section Test if advertisement contains HID UUID
* @param packet
* @param size
* @returns true if it does
*/
static bool adv_event_contains_hid_service(const uint8_t * packet){
const uint8_t * ad_data = gap_event_advertising_report_get_data(packet);
uint8_t ad_len = gap_event_advertising_report_get_data_length(packet);
return ad_data_contains_uuid16(ad_len, ad_data, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE);
}
/**
* Start scanning
*/
static void hog_start_scan(void){
printf("Scanning for LE HID devices...\n");
app_state = W4_HID_DEVICE_FOUND;
// Passive scanning, 100% (scan interval = scan window)
gap_set_scan_parameters(0,48,48);
gap_start_scan();
}
/**
* Handle timeout for outgoing connection
* @param ts
*/
static void hog_connection_timeout(btstack_timer_source_t * ts){
UNUSED(ts);
printf("Timeout - abort connection\n");
gap_connect_cancel();
hog_start_scan();
}
/**
* Connect to remote device but set timer for timeout
*/
static void hog_connect(void) {
// set timer
btstack_run_loop_set_timer(&connection_timer, 10000);
btstack_run_loop_set_timer_handler(&connection_timer, &hog_connection_timeout);
btstack_run_loop_add_timer(&connection_timer);
app_state = W4_CONNECTED;
gap_connect(remote_device.addr, remote_device.addr_type);
}
/**
* Handle timer event to trigger reconnect
* @param ts
*/
static void hog_reconnect_timeout(btstack_timer_source_t * ts){
UNUSED(ts);
switch (app_state){
case W4_TIMEOUT_THEN_RECONNECT:
hog_connect();
break;
case W4_TIMEOUT_THEN_SCAN:
hog_start_scan();
break;
default:
break;
}
}
/**
* Start connecting after boot up: connect to last used device if possible, start scan otherwise
*/
static void hog_start_connect(void){
// check if we have a bonded device
btstack_tlv_get_instance(&btstack_tlv_singleton_impl, &btstack_tlv_singleton_context);
if (btstack_tlv_singleton_impl){
int len = btstack_tlv_singleton_impl->get_tag(btstack_tlv_singleton_context, TLV_TAG_HOGD, (uint8_t *) &remote_device, sizeof(remote_device));
if (len == sizeof(remote_device)){
printf("Bonded, connect to device with %s address %s ...\n", remote_device.addr_type == 0 ? "public" : "random" , bd_addr_to_str(remote_device.addr));
hog_connect();
return;
}
}
// otherwise, scan for HID devices
hog_start_scan();
}
/**
* In case of error, disconnect and start scanning again
*/
static void handle_outgoing_connection_error(void){
printf("Error occurred, disconnect and start over\n");
gap_disconnect(connection_handle);
hog_start_scan();
}
/**
* Handle GATT Client Events dependent on current state
*
* @param packet_type
* @param channel
* @param packet
* @param size
*/
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);
gatt_client_characteristic_t characteristic;
uint8_t att_status;
static uint8_t boot_protocol_mode = 0;
switch (app_state) {
case W4_HID_SERVICE_FOUND:
switch (hci_event_packet_get_type(packet)) {
case GATT_EVENT_SERVICE_QUERY_RESULT:
// store service (we expect only one)
gatt_event_service_query_result_get_service(packet, &hid_service);
break;
case GATT_EVENT_QUERY_COMPLETE:
att_status = gatt_event_query_complete_get_att_status(packet);
if (att_status != ATT_ERROR_SUCCESS) {
printf("Query failed, ATT Error 0x%02x.\n", att_status);
handle_outgoing_connection_error();
break;
}
printf("Find required HID Service Characteristics...\n");
app_state = W4_HID_CHARACTERISTICS_FOUND;
gatt_client_discover_characteristics_for_service(&handle_gatt_client_event, connection_handle, &hid_service);
break;
default:
break;
}
break;
case W4_HID_CHARACTERISTICS_FOUND:
switch (hci_event_packet_get_type(packet)){
case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT:
// get characteristic
gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic);
switch (characteristic.uuid16){
case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT:
printf("Found CHARACTERISTIC_BOOT_KEYBOARD_INPUT_REPORT, value handle 0x%04x\n", characteristic.value_handle);
memcpy(&boot_keyboard_input_characteristic, &characteristic, sizeof(gatt_client_characteristic_t));
break;
case ORG_BLUETOOTH_CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT:
printf("Found CHARACTERISTIC_BOOT_MOUSE_INPUT_REPORT, value handle 0x%04x\n", characteristic.value_handle);
memcpy(&boot_mouse_input_characteristic, &characteristic, sizeof(gatt_client_characteristic_t));
break;
case ORG_BLUETOOTH_CHARACTERISTIC_PROTOCOL_MODE:
printf("Found CHARACTERISTIC_PROTOCOL_MODE\n");
memcpy(&protocol_mode_characteristic, &characteristic, sizeof(gatt_client_characteristic_t));
break;
default:
break;
}
break;
case GATT_EVENT_QUERY_COMPLETE:
att_status = gatt_event_query_complete_get_att_status(packet);
if (att_status != ATT_ERROR_SUCCESS) {
printf("Query failed, ATT Error 0x%02x.\n", att_status);
handle_outgoing_connection_error();
break;
}
printf("Enable Notifications for Boot Keyboard Input Report..\n");
app_state = W4_BOOT_KEYBOARD_ENABLED;
gatt_client_write_client_characteristic_configuration(&handle_gatt_client_event, connection_handle, &boot_keyboard_input_characteristic, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION);
break;
default:
break;
}
break;
case W4_BOOT_KEYBOARD_ENABLED:
switch (hci_event_packet_get_type(packet)){
case GATT_EVENT_QUERY_COMPLETE:
att_status = gatt_event_query_complete_get_att_status(packet);
if (att_status != ATT_ERROR_SUCCESS) {
printf("Query failed, ATT Error 0x%02x.\n", att_status);
handle_outgoing_connection_error();
break;
}
// setup listener
gatt_client_listen_for_characteristic_value_updates(&keyboard_notifications, &handle_boot_keyboard_event, connection_handle, &boot_keyboard_input_characteristic);
//
printf("Enable Notifications for Boot Mouse Input Report..\n");
app_state = W4_BOOT_MOUSE_ENABLED;
gatt_client_write_client_characteristic_configuration(&handle_gatt_client_event, connection_handle, &boot_mouse_input_characteristic, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION);
break;
default:
break;
}
break;
case W4_BOOT_MOUSE_ENABLED:
switch (hci_event_packet_get_type(packet)) {
case GATT_EVENT_QUERY_COMPLETE:
att_status = gatt_event_query_complete_get_att_status(packet);
if (att_status != ATT_ERROR_SUCCESS) {
printf("Query failed, ATT Error 0x%02x.\n", att_status);
handle_outgoing_connection_error();
break;
}
// setup listener
gatt_client_listen_for_characteristic_value_updates(&mouse_notifications, &handle_boot_mouse_event, connection_handle, &boot_mouse_input_characteristic);
// switch to boot mode
printf("Set Protocol Mode to Boot Mode..\n");
gatt_client_write_value_of_characteristic_without_response(connection_handle, protocol_mode_characteristic.value_handle, 1, &boot_protocol_mode);
// store device as bonded
if (btstack_tlv_singleton_impl){
btstack_tlv_singleton_impl->store_tag(btstack_tlv_singleton_context, TLV_TAG_HOGD, (const uint8_t *) &remote_device, sizeof(remote_device));
}
// done
printf("Ready - please start typing or mousing..\n");
app_state = READY;
break;
default:
break;
}
break;
default:
break;
}
}
/* LISTING_START(packetHandler): Packet Handler */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
/* LISTING_PAUSE */
UNUSED(channel);
UNUSED(size);
uint8_t event;
/* LISTING_RESUME */
switch (packet_type) {
case HCI_EVENT_PACKET:
event = hci_event_packet_get_type(packet);
switch (event) {
case BTSTACK_EVENT_STATE:
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) break;
btstack_assert(app_state == W4_WORKING);
hog_start_connect();
break;
case GAP_EVENT_ADVERTISING_REPORT:
if (app_state != W4_HID_DEVICE_FOUND) break;
if (adv_event_contains_hid_service(packet) == false) break;
// stop scan
gap_stop_scan();
// store remote device address and type
gap_event_advertising_report_get_address(packet, remote_device.addr);
remote_device.addr_type = gap_event_advertising_report_get_address_type(packet);
// connect
printf("Found, connect to device with %s address %s ...\n", remote_device.addr_type == 0 ? "public" : "random" , bd_addr_to_str(remote_device.addr));
hog_connect();
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
if (app_state != READY) break;
connection_handle = HCI_CON_HANDLE_INVALID;
switch (app_state){
case READY:
printf("\nDisconnected, try to reconnect...\n");
app_state = W4_TIMEOUT_THEN_RECONNECT;
break;
default:
printf("\nDisconnected, start over...\n");
app_state = W4_TIMEOUT_THEN_SCAN;
break;
}
// set timer
btstack_run_loop_set_timer(&connection_timer, 100);
btstack_run_loop_set_timer_handler(&connection_timer, &hog_reconnect_timeout);
btstack_run_loop_add_timer(&connection_timer);
break;
case HCI_EVENT_META_GAP:
// wait for connection complete
if (hci_event_gap_meta_get_subevent_code(packet) != GAP_SUBEVENT_LE_CONNECTION_COMPLETE) break;
if (app_state != W4_CONNECTED) return;
btstack_run_loop_remove_timer(&connection_timer);
connection_handle = gap_subevent_le_connection_complete_get_connection_handle(packet);
// request security
app_state = W4_ENCRYPTED;
sm_request_pairing(connection_handle);
break;
default:
break;
}
break;
default:
break;
}
}
/* LISTING_END */
/* @section HCI packet handler
*
* @text The SM packet handler receives Security Manager Events required for pairing.
* It also receives events generated during Identity Resolving
* see Listing SMPacketHandler.
*/
/* LISTING_START(SMPacketHandler): Scanning and receiving advertisements */
static void sm_packet_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;
bool connect_to_service = false;
switch (hci_event_packet_get_type(packet)) {
case SM_EVENT_JUST_WORKS_REQUEST:
printf("Just works requested\n");
sm_just_works_confirm(sm_event_just_works_request_get_handle(packet));
break;
case SM_EVENT_NUMERIC_COMPARISON_REQUEST:
printf("Confirming numeric comparison: %"PRIu32"\n", sm_event_numeric_comparison_request_get_passkey(packet));
sm_numeric_comparison_confirm(sm_event_passkey_display_number_get_handle(packet));
break;
case SM_EVENT_PASSKEY_DISPLAY_NUMBER:
printf("Display Passkey: %"PRIu32"\n", sm_event_passkey_display_number_get_passkey(packet));
break;
case SM_EVENT_PAIRING_COMPLETE:
switch (sm_event_pairing_complete_get_status(packet)){
case ERROR_CODE_SUCCESS:
printf("Pairing complete, success\n");
connect_to_service = true;
break;
case ERROR_CODE_CONNECTION_TIMEOUT:
printf("Pairing failed, timeout\n");
break;
case ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION:
printf("Pairing failed, disconnected\n");
break;
case ERROR_CODE_AUTHENTICATION_FAILURE:
printf("Pairing failed, reason = %u\n", sm_event_pairing_complete_get_reason(packet));
break;
default:
break;
}
break;
case SM_EVENT_REENCRYPTION_COMPLETE:
printf("Re-encryption complete, success\n");
connect_to_service = true;
break;
default:
break;
}
if (connect_to_service){
// continue - query primary services
printf("Search for HID service.\n");
app_state = W4_HID_SERVICE_FOUND;
gatt_client_discover_primary_services_by_uuid16(handle_gatt_client_event, connection_handle, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE);
}
}
/* LISTING_END */
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
(void)argv;
/* LISTING_START(HogBootHostSetup): HID-over-GATT Boot Host Setup */
l2cap_init();
// setup SM: Display only
sm_init();
sm_set_io_capabilities(IO_CAPABILITY_DISPLAY_ONLY);
sm_set_authentication_requirements(SM_AUTHREQ_SECURE_CONNECTION | SM_AUTHREQ_BONDING);
//
gatt_client_init();
// register for events from HCI
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// register for events from Security Manager
sm_event_callback_registration.callback = &sm_packet_handler;
sm_add_event_handler(&sm_event_callback_registration);
/* LISTING_END */
// Disable stdout buffering
setvbuf(stdin, NULL, _IONBF, 0);
app_state = W4_WORKING;
// Turn on the device
hci_power_control(HCI_POWER_ON);
return 0;
}
/* EXAMPLE_END */
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