sd_ble_gatts_hvx overflow ?

[Fabien Comte]

Hello,

i use notifications with sd_ble_gatts_hvx. If I push a lot of data, are notifications overwritten or do they are fifoed ?

How to do a kind of flow control to not loss any data ?

[RK]

This is in the documentation for sd_ble_gatts_hvx, when you run out of buffers, you get BLE_ERR_NO_TX_BUFFERS. Your update is thrown away at that point. Flow control requires you to check the return code and retry later, or count the buffers used and subscribe to the BLE_EVT_TX_COMPLETE messages to know when you have buffers free.

[Fabien Comte]

Ok thank you