What should I do to get nrf51-ble-app-lbs-throughput-test-5.2.0 working with PCA10028 v1.1.0 board ?

[smuniraj]

I have followed the instructions and have tried with s110 6.0.0 and SDK 5.2. I can compile and download to the board but can never detect under discoverable device onn MCP running on a PC? Is it not advertising ? Please suggest the necessary modification for the program to run on this board. I also see this branch is couple of commits behind the master code. Can you please update it ?

[Stefan Birnir Sverrisson]

Hi smuniraj

Yes, you are correct. The throughput test is for an old SDK which is not targeted at the PCA10028. We will try to update it soon. Meanwhile, I suspect it should work if you get the SDKv8.0 branch to work on your board and then just copy the data_send() function from the throughput test into the SDKv8.0 code and call it in the same way as in the button_event_handler

Update 31.8.2015 I have managed to port the ble_app_lbs throughput example to SDK 8.0.0 and measure around the theoretical maximum throughput on my side. Check if you can get the same on your side.

nrf51-ble-app-lbs-master - throughput test.zip

[smuniraj]

Hello Stefan,

Thank you so much for your pointers. I followed your suggestion and ended up modifying the throughput app to work for PCA 10028 v1.10 board. However the maximum data throughput I am getting currently in an office environment is 55kbps with MCP. I did check the connection interval from the log file and I am sure its 7.5ms as I have modified in the code like this

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)          /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)

I was expecting it to be somewhere close to theoretical output 128kbps as mentioned in this article devzone.nordicsemi.com/.../ since I am using the same Master Emulator Firmware (MEFW) with nRF51822 0.11.0. Is there anything I can do to improve the throughput? I did measure it multiple times and it averages around 55kbps

[Stefan Birnir Sverrisson]

You should get 128 kbps if receiving 6 packets per connection interval, 20 bytes per packet and the connection interval is 7.5 seconds, i.e. 0.0075^-1 * 20 * 8 * 6 = 128.000. Do you see in your test how many bytes are received per packet and if there are 6 packets received per connection interval?