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CCS/CC3220MODA: TCP packet deployed between 1st one and 2nd one

Part Number: CC3220MODA

Tool/software: Code Composer Studio

Hello Experts,

We are developing P2P application using two CC3220MODs, one is STA and another is AP. The data is sent 1000 Byte from STA to AP every 30ms by STA calling sl_send(). STA is acquiring IP address then soon starts to call sl_send() after socket is created.

We noticed that the duration between the first TCP transmission and 2nd one is delayed about 200ms while sl_send() is called every 30ms. Thus, the following TCP transmissions occurs frequently which requires AP application to handle more large data in short period. So we want to avoid this kind of delay. Below is the air log.

This is the case to just start to calling sl_send(). After the initial state, the duration is almost 30ms.

Can we remove this delay?

Regards,

Hisao Uchikoshi

  • Hi Hisao Uchikoshi,

    There's a special mechanism for accelerating the first packet upon NWP wakeup which can affect the duration before the second packet, but there is no way to disable it. If this is an issue in your application, I would suggest sending an initial dummy packet.

    Best regards,
    Sarah