nRF52 DK number of packets sent/received.

RE: nRF52 DK number of packets sent/received.

Vidar Berg — Mon, 07 May 2018 07:01:52 GMT

I'm not sure why there are 5 packets in the first connection event, and only 4 packets for the following events, but the 52 will support 6+ packets with proposed configuration, so this is probably limited by the Android phone. Have you tried the same with other phones?

RE: nRF52 DK number of packets sent/received.

coloradocam — Fri, 04 May 2018 19:05:32 GMT

So tried both options, did not work. I attached screenshots of the phone. On the first second it receives 5 notifications, and each time after is 4. So weird to me that it would do it the first time but not after that. May be I am just gonna have to stick to just 4 for now lol.

RE: nRF52 DK number of packets sent/received.

Vidar Berg — Fri, 04 May 2018 14:05:30 GMT

Hi,

Have you tried to increase the BLE event length (NRF_SDH_BLE_GAP_EVENT_LENGTH in sdk_config.h) to 6*1.25 ms or more? You may also try to increase the TX buffer size when you initialize the stack, see ble_gatts_conn_cfg_t::hvn_tx_queue_size.

Note that the number of packets may be limited by the central device as well. We have tested this on a selection of phones, and it varies quite a bit. Test results can be found in section 4.5 in this document: BLE_on_Android_v1.0.1.pdf