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Code Issues Releases Wiki Activity

make notification example a little more general

pull/220/head
0xloem 2020-12-16 05:51:12 -05:00 committed by Olivier Martin
parent 15210d1c35
commit edb5862f96
1 changed files with 41 additions and 6 deletions
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47
examples/notification/notification.c
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@ -29,8 +29,8 @@
#include "gattlib.h"
// Battery Level UUID
const uuid_t g_battery_level_uuid = CREATE_UUID16(0x2A19);
static uuid_t g_notify_uuid;
static uuid_t g_write_uuid;
static GMainLoop *m_main_loop;
@ -50,18 +50,32 @@ static void on_user_abort(int arg) {
}
static void usage(char *argv[]) {
printf("%s <device_address>\n", argv[0]);
printf("%s <device_address> <notification_characteristic_uuid> [<write_characteristic_uuid> <write_characteristic_hex_data> ...]\n", argv[0]);
}
int main(int argc, char *argv[]) {
int ret;
int argid;
gatt_connection_t* connection;
if (argc != 2) {
if (argc < 3) {
usage(argv);
return 1;
}
if (gattlib_string_to_uuid(argv[2], strlen(argv[2]) + 1, &g_notify_uuid) < 0) {
usage(argv);
return 1;
}
if (argc > 3) {
if (gattlib_string_to_uuid(argv[3], strlen(argv[3]) + 1, &g_write_uuid) < 0) {
usage(argv);
return 1;
}
}
connection = gattlib_connect(NULL, argv[1], GATTLIB_CONNECTION_OPTIONS_LEGACY_DEFAULT);
if (connection == NULL) {
fprintf(stderr, "Fail to connect to the bluetooth device.\n");
@ -70,12 +84,33 @@ int main(int argc, char *argv[]) {
gattlib_register_notification(connection, notification_handler, NULL);
ret = gattlib_notification_start(connection, &g_battery_level_uuid);
ret = gattlib_notification_start(connection, &g_notify_uuid);
if (ret) {
fprintf(stderr, "Fail to start notification.\n");
goto DISCONNECT;
}
// Optional byte writes to make to trigger notifications
for (argid = 4; argid < argc; argid ++) {
unsigned char data[256];
char * charp;
unsigned char * datap;
for (charp = argv[4], datap = data; charp[0] && charp[1]; charp += 2, datap ++) {
sscanf(charp, "%02hhx", datap);
}
ret = gattlib_write_char_by_uuid(connection, &g_write_uuid, data, datap - data);
if (ret != GATTLIB_SUCCESS) {
if (ret == GATTLIB_NOT_FOUND) {
fprintf(stderr, "Could not find GATT Characteristic with UUID %s.\n", argv[3]);
} else {
fprintf(stderr, "Error while writing GATT Characteristic with UUID %s (ret:%d)\n",
argv[3], ret);
}
goto DISCONNECT;
}
}
// Catch CTRL-C
signal(SIGINT, on_user_abort);
@ -83,7 +118,7 @@ int main(int argc, char *argv[]) {
g_main_loop_run(m_main_loop);
// In case we quit the main loop, clean the connection
gattlib_notification_stop(connection, &g_battery_level_uuid);
gattlib_notification_stop(connection, &g_notify_uuid);
g_main_loop_unref(m_main_loop);
DISCONNECT: