nRF7002Dk send wifi beacon on 3 channel with the samples "raw_tx_packet"

[jay wang]

Hi Supporter:

  I want make a wifi position card with nRF7002 which support low power and fast beacon sending. 

  I evaluate it with nRF7002. 

  Now i have some problem about this(Environment:  nrf-sdk main branch, samples\wifi\raw_tx_packet):

1. i want to send the beacon on 3 channel(1,6,11) every 250ms. 

       The code:

uint8_t channel_info[3] = {6,1,11};

static void wifi_send_raw_tx_packets(void)

{......

        for (int i = 0; i < 3; i++) {

            wifi_set_channel(channel_info[i]);

            memcpy(test_frame + sizeof(struct raw_tx_pkt_header),

                   &test_beacon_frame, sizeof(test_beacon_frame));

           

            ret = sendto(sockfd, test_frame, buf_length, 0,

                    (struct sockaddr *)&sa, sizeof(sa));

            if (ret < 0) {

                LOG_ERR("Unable to send beacon frame: %s", strerror(errno));

                num_failures++;

            }

            increment_seq_control();

            k_msleep(CONFIG_RAW_TX_PACKET_SAMPLE_INTER_FRAME_DELAY_MS);

        }

}

The beacon is sending success when it slowly. But when the beacon interval update to 250ms, There have some error:

[00:01:20.487,121] [1;31m<err> wifi_nrf: umac_cmd_alloc: Failed to allocate UMAC cmd[0m
[00:01:20.487,152] [1;31m<err> wifi_nrf: nrf_wifi_fmac_set_channel: umac_cmd_alloc failed[0m
[00:01:20.487,182] [1;31m<err> wifi_nrf: nrf_wifi_channel: set channel failed[0m
[00:01:20.487,182] [1;31m<err> raw_tx_packet: Channel setting failed -1

I thought that the beacon sending is fast, not need wait so long time, ,Could you tell me if it has some better way to implement this feature.

2. The low power is 120uA when the nRF7002DK sleep. I thought that it should be lower power consumption. 

I test the current refer to the document "nRF7002_DK_User_Guide_v1.0.0.pdf". 

I get 3uA when the net shutdown refer to the sample "shutdown"(suspend the debug serial). 

Could you please tell if there have a register description document available for reference

[jay wang]

Please clarify, when you don't switch channel and set CONFIG_RAW_TX_PACKET_SAMPLE_INTER_FRAME_DELAY_MS = 10ms then it stopped working after a while, correct ? How long if it take ?  Yes, 1 - 10 minutes, Not fixed. 

If you set CONFIG_RAW_TX_PACKET_SAMPLE_INTER_FRAME_DELAY_MS  >10ms, for example 50ms , do you see the problem ? I set it to 50ms, The mcu restart at 58 sec in my first test.  Not fixed too. 

[Hung Bui]

Thanks Jay for the info. I have reported this to our Wifi team. 
Please be aware that what you are testing on is the main repo so issues are expected as it's not the stable release. 

[jay wang]

OK,Thanks.I guess i 'd better wait util the stable version comes out to verify this feature.

[narfster]

HI,

I am also inquiring about the raw_tx_packet demo.

I have also create a small app based on this demo where i change channels to 1,6,11 and send raw packets.

here is the result of power profile - current.

the channel switching itself is very slow and cannot be used in real world application. 756ms for 3 channels.

same code without channel switching - you can see that the time it takes for sending 3 packets one after another on same channel in total is 20ms.

is there any work done on this? 

thanks

Dan

[narfster]

for completeness -

1 channel 1 packet - power DK7002 ~20ms.

changed sample to:

1. transmit in legacy mode (802.11g)

CONFIG_RAW_TX_PKT_SAMPLE_RATE_FLAGS 0

2. enabled low power with this

CONFIG_NRF_WIFI_LOW_POWER=y