How to do Rx blocking test for nRF52840 BLE module

[mayank_patel]

Hello All,

I want to perform an Rx blocking test for my nRF52840 BLE chip which is installed on my custom board. I wan to transfer the packets from device to other, and by that i want to measure the error rate (Pcakage drop rate).

Can anyone suggest which binary/application from nRF SDK will be needed to build & flash on BLE chip.

I have gone through different forums and found that DTM application can do that job but for that i need to have a CMW/Anritsu tester, which i didn't have.

Q1: Is there any other way (with DTM app without using Tester) using which i can verify the Rx error rate of nRF chip.

Q2: Or, Is there any alternate way using which i can able to verify the error rate of nRF52840 chip.

NOTE: I also have nRF52840 Dongle, Which i can use to transmit data to BLE chip.

Q3: Is there any application in nRF SDK using which i can send and receive data between 2 devices and hence measure the error rate.

Thanks,

Mayank

[bjorn-spockeli]

The easiest way to perform the receiver vblocking test is to use DTM as this has already built in all functionality to measure PER. Either together with a Bluetooth LE tester like a CMW /Anritsu or by setting up another DK as described in this whitepaper: https://www.nordicsemi.com/-/media/DocLib/Other/App_Notes/nAN34v101.zip?la=en

This is made for a older device, but it's still valid for the nRF52840

Best regards

Bjørn

[mayank_patel]

Hi Bjørn,

Thanks for clearing my doubt.

I have successfully done Rx blocking test with the help of DTM application (Available in nrf SDK).

Here I would like to mention my setup procedure for the same in brief.

1) I have 2 custom boards, Both have Nordic's nrf52840 BLE chip onboard.

2) Connected both the boards to PC (USB to serial) so that i can access both the nrf52840 chip over UART.

3) Used example.py script (Got from nAN34_v1.01 availble on nordic/blogpost) to measure the PER.

This python script will communicate with both the boards and hence will measure the PER.

Thanks,

Mayank

[bjorn-spockeli]

HI Mayank, 

Happy to hear that you have a functional PER test setup.

Best regards

Bjørn