Testing througput exemple. Not reaching maximum data rate.

RE: Testing througput exemple. Not reaching maximum data rate.

Simonr — Fri, 05 Jun 2020 07:30:04 GMT

Hi Eduardo

I see where you're coming from, but we've made a conscious choice to not have these very specific demos as part of our example projects in the SDK, as additional peripheral HW is required to run the ble_image_transfer demo, and the ble_app_att_mtu_throughput does demonstrate similar throughput by transmitting the logger output to another device, I.E. a phone using the nRFConnect app.

I'm sorry about the initial misunderstanding, as I thought you wanted to develop a phone app to test throughput on. In order to test throughput when communicating with an iOS device I would suggest either editing the ble_app_att_mtu_throughput example to be able to communicate with a phone and read the throughput there. You can alternatively use one of the other examples to transfer X amount of data and see by the timestamps in the log how long it takes to transfer a set amount of data, which would make it pretty straight-forward to calculate the throughput between the devices.

Best regards,

Simon

RE: Testing througput exemple. Not reaching maximum data rate.

Eduardo Carletti — Thu, 04 Jun 2020 20:14:33 GMT

Hi Simon, I was looking for something more straightforward. This exemple made by Torbjorn helped me. As I don't have the camera board, I had to modify the firmware to send an array of bytes (binary data extracted from a JPEG picture). In fact, I'd like to suggest to Nordic to provide this source code together with the SDK. Only down side is that I wasn't able to test using iPhone, and am not sure if this kind of data rate would be feasible.

RE: Testing througput exemple. Not reaching maximum data rate.

Simonr — Thu, 04 Jun 2020 06:35:43 GMT

Hi Eduardo

I'm glad you were able to figure out what was missing on your own. To get started with testing on a phone, I suggest looking at the nRFConnect or nRFToolbox app for Android or iOS. The apps also have their source code publicly available on GitHub.

Best regards,

Simon

RE: Testing througput exemple. Not reaching maximum data rate.

Eduardo Carletti — Wed, 03 Jun 2020 14:46:56 GMT

So, after a bunch of trying, found that I needed to change the data length. Gone to 251B, now I have 1300kbps. That's great.

My next step is to test this whith an smartphone. Any ideas? I really don't know where to start..