ST67W611 W6X_Net_Send() takes ~391 ms for every send() call irrespective of data size

[SA_ABHY]

I am using the ST67W611 Wi-Fi module with the ST67 W6X SDK to implement an HTTP web server.

While profiling the performance, I observed that every call to W6X_Net_Send() takes approximately 391 ms (or more) regardless of the amount of data being transmitted. 

Test Setup

• Module: ST67W611
• Interface: SPI
• Transport: TCP
• Firmware: 1.1.1
• SDK Version : 2.0.89
• MCU: STM32F4

 

 

Questions

1. Is a fixed delay of approximately 391 ms per W6X_Net_Send() call expected?
2. Is W6X_Net_Send() internally waiting for a TCP ACK or another event before returning?
3. Is there any configurable transmit timeout or buffering mechanism that affects this behavior?
4. Is there a recommended maximum chunk size for W6X_Net_Send() to improve throughput?
5. Are there any SDK or firmware settings that can reduce this latency?

Any guidance would be greatly appreciated.

Thank you.

[Ozone]

> ... I observed that every call to W6X_Net_Send() takes approximately 391 ms (or more) regardless of the amount of data being transmitted. 

Didi you look into the source code ?

It sounds as the code is busy-waiting for some kind of acknowledge.

Welcome to the world of Cube/HAL ...