Hi,
I am running the raw_tx_packet sample (ncs v3.1.0) on nrf7002dk with the following configuration (additions to prj.conf in the sample)
# APPLICATION CONFIG_RAW_TX_PKT_SAMPLE_INTER_FRAME_DELAY_MS=1000 CONFIG_RAW_TX_PKT_SAMPLE_TX_MODE_FIXED=y CONFIG_RAW_TX_PKT_SAMPLE_FIXED_NUM_PACKETS=10000 CONFIG_RAW_TX_PKT_SAMPLE_QUEUE_NUM=3 # RATE CONFIG_RAW_TX_PKT_SAMPLE_RATE_VALUE=5 CONFIG_RAW_TX_PKT_SAMPLE_RATE_FLAGS=2 # DRIVER CONFIG_NRF70_MAX_TX_AGGREGATION=1 # CHANNEL CONFIG_RAW_TX_PKT_SAMPLE_CHANNEL=56
The captured output looks like this
The expected behaviour is that each second there a new packet will be sent. However, the sequence numbers are not increasing monotonically. Rather, it seems like every each packet is sent twice, and odd sequence numbers are skipped. I did another test with very low values for CONFIG_RAW_TX_PKT_SAMPLE_INTER_FRAME_DELAY_MS and then I see even more duplicates and out of order sequence like 8004, 8012, 7086 etc. This leads to two questions
- Is the nrf7002 doing retransmissions on raw tx packets?
- Is there any sort of re-ordering of packets in the driver/rf7002?
I also have some questions about performance tuning. I saw some numbers posted in: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/protocols/wifi/stack_configuration.html#usage_profiles. None of those are using the raw packet tx injection. Is it possible to get close to those limits in this mode? Does the nrf7002 have e.g a known max number of smaller packets, lets say 600 bytes long that it can send per second?
Best regards,
Rulle
