How to increase throughput of TCP connection?

[michael lee]

Hi,

I used IOT TCP Server example of nRF5 SDK(Ver.15.0) to complete the communication

between the Raspberry Pi and the PCA10040.

But I found that the communication speed is too slow，only about 1000 bytes per second.

Far less than the optimized NORDIC UART with about 8000 bytes per second.

I refer to ‘ATT_MTU Throughput Example’ for various attempts but have no effect.

Can I increase the throughput of TCP connection same to  the optimized NORDIC UART？

[bjorn-spockeli]

What happens if you try to increase the NRF_SDH_BLE_GATT_MAX_MTU_SIZE in sdk_config.h to something larger than 23, e.g. 46? Do you see an improvement then? You could also try to reduce the MAX_CONN_INTERVAL to lower the connection interval. 

Best regards

Bjørn