nRF51 IoT UDP transfer speed

[Alex]

Hi All,

I use iot_ipv6_udp_client example on nRF51 DK. I modified it and send data in one direction only (not receiving back). Testing has shown that the maximum packet rate for short packets (20 - 30 bytes of payload) is about 13 packets per second. For packets of 140 bytes payload maximum packets rate is 10 packets per second. That means that the data rate approximately is 1400 bytes per second. When I tested the BLE UART example, I watched the transmission speed about 2300 bytes per second. Regarding the information about BLE 4.2 (IoT), I expect that the data rate should rise about 2.5 times. But the real data transfer rate was much lower.

Q: How can I increase the speed of data transmission via UDP and what speed (in one direction) the maximum I can expect?

Thanks in advance.

[Alex]

Petter, thank you very much for your reply.

I'm using nRF51 IoT SDK and an iot_ipv6_udp_client example for the implementation of data transfer via UDP connection. I use as a central device the ASUS USB-BT400 usb dongle and PC with Ubuntu with 6lowpan support. I'm trying to evaluate the maximum possible speed of data transmission over the Internet via UDP connection. To receive data on the PC I'm using Python script based on examples from the Nordic. I not found in the iot_ipv6_udp_client example the ability to change connection interval. I also tried to add my own code for that. But this is to no avail.