I think that it is possible to read / write to the gatt profile using the "hci_send_req" function or the "hci_send_cmd" function. However, we can not find the parameters that set the data. Is it connected to the terminal of BLE and read / write to Gatt profile is not prepared?
Added..2018/11/22 17:06 (JST)
First of all, I investigate whether it can be realized from the command line.
The environment is RaspberryPi3.
pi@raspberrypi:~ $ sudo dbus-send --print-reply --system --dest=org.bluez /org/bluez/hci0/dev_XX_XX_XX_XX_XX_XX --type=method_call org.bluez.Device1.Connect
Error org.bluez.Error.Failed: Software caused connection abort
Sorry, please hide the MAC address.
With the gatttool command, connect, primary, char-read-hnd, and char-write-req (cmd) are possible terminals.
Add... 2018/11/22 20:43
Thank you for the information.
I tried, but org.bluez.Adapter1 actually exists, but an error occurs.
pi@raspberrypi:~ $ sudo ./glibtest XX:XX:XX:XX:XX:XX
Adapter is Powered "on"
Unable to get result: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Method "ConnectDevice" with signature "a{sv}" on interface "org.bluez.Adapter1" doesn't exist
The existence of org.bluez.Adapter1 is checked with the following command.
sudo dbus-send --print-reply --system --dest=org.bluez /org/bluez/hci0 --type=method_call org.freedesktop.DBus.Introspectable.Introspect
</method></interface><interface name="org.bluez.Adapter1"><method name="StartDiscovery"></method><method name="SetDiscoveryFilter"><arg name="properties" type="a{sv}" direction="in"/>
The version of bluez has been updated from 5.43 to 5.44.