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Performance between STM32H747-DISCO and Murata Type 1lv

Associate III


I'm evaluating the WIFI/BLE module 1LV by Murata with a STM32H747-Dicovery board and Murata adapter as reported in the PDF file in

The connection works fine (wifi scan OK and connection OK) and now I'm trying to increase the communication performance; the first test, using LWIP stack as server on MCU and ipref client on windows/linux side gave me only 0.15-0.20MB/s (150kBps) that seems to me very VERY slow using SDIO interface (with 25MHz clock).

Do anybody have any clues to increase this bitrate?

What can I change from the test project ( to increase WIFI performance?

Do you also think that LWIP stack is the correct "library" to have good performance (at least 2.5-3.0MB/s)


ST Employee

I believe 1MB/s is achievable with LwIP stack, if SDIO interface has 4-bit data bus.

It will be another story if the SDIO interface has 1-bit data bus only. in such case 0.2MB/s is reasonable.

Associate III

Thanks for your message.

I confirm you that SDIO has 4-bit data bus (SDIO 3.0 at 1.8V with clk@25MHz) but the bit rate, at the moment, remains at 0.15-0.20MB/s using netconn API (I'm using multitasking environment).

Don't you think that LWIP can reach 2.0-3.0MB/s?

In this case should I use another TCP/IP stack? (for example FreeRTOS+TCP/IP)


Andrew Neil
Evangelist III

The "Lw" in "LwIP" stands for "Light-weight" - it is not intended to be a high-performance stack...

I am not sure if 2.0-3.0MB/s is achievable, for either LwIP or FreeRTOS+TCP/IP.

anyway you need to get 1MB/s first, as you can only get 0.2MB/s.

some works are needed, such as, checksum offloading, more buffers (possible for STM32H747 which has about 500kB RAM if I remember well), client to send request in queue way, proper network data size(1kB or more), and so on, to improve the network throughput.

Ok. LW I thought it was for low RAM and ROM footprint but it was able to reach better performance than 200kBps...

Do you know other high-performance TCP/IP stack for STM32H7xx? Even not for free?


"LW I thought it was for low RAM and ROM footprint"


"Do you know other high-performance TCP/IP stack for STM32H7xx?"

Not off hand. Google is your friend.

(other internet search engines are available)

I was just asking you, if you had used other TCP/IP stack for high-performance because you seemed prepared.

indeed. just confirming that I don't know - and not just ignoring you.

commercial version TCP/IP stack should be available for STM32H7, I believe.

I suppose you had better contact your local ST FAE/sales to get accurate information and support, regarding non-free stack.