| Bluetooth: GATT Shell |
| ##################### |
| |
| The following examples assume that you have two devices already connected. |
| |
| To perform service discovery on the client side, use the :code:`gatt discover` command. This should |
| print all the services that are available on the GATT server. |
| |
| On the server side, you can register pre-defined test services using the :code:`gatt register` |
| command. When done, you should see the newly added services on the client side when running the |
| discovery command. |
| |
| You can now subscribe to those new services on the client side. Here is an example on how to |
| subscribe to the test service: |
| |
| .. code-block:: console |
| |
| uart:~$ gatt subscribe 26 25 |
| Subscribed |
| |
| The server can now notify the client with the command :code:`gatt notify`. |
| |
| Another option available through the GATT command is initiating the MTU exchange. To do it, use the |
| :code:`gatt exchange-mtu` command. To update the shell maximum MTU, you need to update Kconfig |
| symbols in the configuration file of the shell. For more details, see |
| :zephyr:code-sample:`bluetooth_mtu_update`. |
