Correct way to config hvn_tx_queue_size

Just need a quick confirmation, in S140/SDK15.2, what is the correct to config hvn_tx_queue_size? 

I found in some post said it can not be set directly, instead one should only change NRF_SDH_BLE_GAP_EVENT_LENGTH.

While in other posts said it can be direct set as in here

So which one exactly should be the right way? Will change NRF_SDH_BLE_GAP_EVENT_LENGTH only work in 15.2?


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  • Depending on how much you want to change the queue size, you might have to increase NRF_SDH_BLE_GATT_MAX_MTU_SIZE as well to increase the static MTU size and NRF_SDH_BLE_GAP_DATA_LENGTH to increase the data length to be negotiated. So yes, hvn_tx_queue_size will be indirectly configured by the SoftDevice, based on what the EVENT_LENGTH and DATA_LENGTH is set to.

    Best regards,