Hi Has any one been able to send notification from LE peripheral to LE central using bluetoothctl? Now I am trying to update "Value" with 0x02 for the below characteristic with read and indicate flag, i am expecting a notification can be sent from peripheral to central automatically. It seems there is no such support in bluetoothctl. Then I do simple code change on below, and try to update value via "update-chrc 0x02", well, the value has been successfully updated, but there is no message/notification sent from peripheral to central automatically. I have confirmed that chrc read from central is showing updated value, 02, correctly. The question is that how can we send characteristic notification/indication using bluez dbus API? btw, I see the video(BlueZ Meets Zephyr made by Luiz) https://www.youtube.com/watch?v=SdmZX5q-XDg In 30:05, I see Zephyr is sending notification to bluetoothctl automatically. How can we just use bluez dbus API to achieve this? for example, In LE peripheral: I setup the below characteristic with read and indicate flag register-service 00001820-0000-1000-8000-00805f9b34fb register-characteristic 00002a06-0000-1000-8000-00805f9b34fb read,indicate register-application advertise peripheral In LE central: connect 00:AA:01:00:00:23 select-attribute /org/bluez/hci1/dev_00_AA_01_00_00_23/service000a/char000b notify on The code change snippet --- a/client/gatt.c +++ b/client/gatt.c -void gatt_register_chrc(DBusConnection *conn, GDBusProxy *proxy, wordexp_t *w) +void chrc_set_value1(const char *input, void *user_data, DBusConnection *conn) +{ + struct chrc *chrc = user_data; + + g_free(chrc->value); + + chrc->value = str2bytearray((char *) input, &chrc->value_len); + g_dbus_emit_property_changed(conn, chrc->path, "org.bluez.GattCharacteristic1", "Value"); + +} +struct chrc * gatt_register_chrc(DBusConnection *conn, GDBusProxy *proxy, wordexp_t *w) { struct service *service; struct chrc *chrc; @@ -1489,6 +1500,8 @@ void gatt_register_chrc(DBusConnection *conn, GDBusProxy *proxy, wordexp_t *w) print_chrc(chrc, COLORED_NEW); rl_prompt_input(chrc->path, "Enter value:", chrc_set_value, chrc); + + return chrc; } --- a/client/main.c +++ b/client/main.c +static void cmd_update_chrc(const char *arg) +{ + chrc_set_value1(arg, default_chrc, dbus_conn); + +} + static void cmd_unregister_characteristic(const char *arg) { wordexp_t w; @@ -2541,6 +2547,9 @@ static const struct { { "register-characteristic", "<UUID> <Flags=read,write,notify...>", cmd_register_characteristic, "Register application characteristic" }, + { "update-chrc", "<value.>", + cmd_update_chrc, + "update chrc value" }, Thanks Best wishes Yunhan -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
