BLE Characteristics

[Roei]

Hi,

After connecting to the Nrf52840 device via BLE - how can I get BLE characteristics? Should I ask for that? Or does it send automatically?

Thanks!

[Jared]

Hi,

You have to use the Database Discovery Module to scan for attributes. This is done by starting a service discovery. See the ble_app_uart_c for an example on how to use the module.

regards

Jared 

[Roei]

Thanks!

After connecting our Nrf52840 device with a PC using BLE, we are facing a strange issue, when reading init characteristic on PC side, and getting bytes array which contains UUID of the characteristics, and the other bytes looks like data which was sent from the device, via ble_nus.

Is that possible that a characteriatic is combined with data which is sent via ble_nus?

[Jared]

Hi,

I'm not sure I understand the problem. What example is flashed to the nRF, the central or the peripheral NUS example? Is it totally unmodified? What's the issue?

regards

Jared 

[Roei]

Nrf52840 device is the central.

I will try to ask another question. After Connection, PC tries to discover device characteristics.

Does the device send any message in order to inform that publishing is done?

[Jared]

Hi,

Yes,

The device should return an BLE_GATTC_EVT_CHAR_DISC_RSP. See the message sequence chart.

regards

Jared