Sending data

[mohBOSS]

Hi all,

I have a small question. If a GATT server needs to send data to a GATT client(about 65 bytes), does it have to create a service first and then adds characteristic, or it can use directly sd_gap_gatts_hvx function()?

Regards,

mohBOSS.

[Carles]

Hi there,

You will need to add a service and a characteristic to send arbitrary data. Once you have the handle to the characteristic you can use sd_ble_gatts_hvx() to send data. Alternatively, if it's easier for you, you can add the service and characteristic on the peer device and use sd_ble_gattc_write() to send data, acting as a GATT client.

Carles

[mohBOSS]

Hi, please I have some questions.

1. When adding a service then a characteristic, this enables the SoftDevice to send BLE events to the application whenever a client wants to use the characteristic. Is that right ?
2. If a client wants to read data (without authorization) from the server, then how can the server use sd_ble_gatts_hvx() if there is no event generated for a Read Request without Authorization to notify the application?

I hope that you understand me. Thanks a lot.

mohBOSS.