[PCA10056] How Can I See data was received in ATT_MTU_Thought_Put

[RoomBee]

I was bought 2 PCA10056 board to do my product. I use ATT_MTU_Thought_Put example in SDK version 13. I also read this tutorial infocenter.nordicsemi.com/index.jsp. And I have some question : 1 - How can I get data was received in the RESPONDER board. ( I am going to write this data to SDCard. But now I want to know how can I see them). 2 - Does RESPONDER send data to TESTER? If RESPONDER can send data to TESTER, how can I do that. ( please give me step by step to do that.) Thanks the DEVTeam!

[Jørgen Holmefjord]

Hi,

The data is sent from the tester board to the responder board using notifications. On the responder board, the notification events are handled in nrf_ble_amtc_on_ble_evt(), and on_hvx() function is called on reception of BLE_GATTC_EVT_HVX event. The data can be seen in p_ble_evt->evt.gattc_evt.params.hvx.data in on_hvx() function.

The tester board is the one implementing the GATT table. The responder board can write to the characteristics of tester board, but I would recommend you implement additional characteristics if you want to send data this way. Please have a look at the BLE service/charactertistics tutorials on how to do this. Writes are handled in on_write() which is called from nrf_ble_amts_on_ble_evt() on reception of BLE_GATTS_EVT_WRITEevent.

Best regards,

Jørgen

[RoomBee]

Sorry ! I am so busy because It is end of the year now :)). Thank for your useful comment :). But I've haven some problem.

You said :"if you want to send data this way". Do you have any way to send data between 2 board? I want to send/receive data between two board . Can you confirm the feature of my plan :)) )

I am reading example. But I don't know which board is server ?(TESTER Board or DUMMY board is the server ?)

[Jørgen Holmefjord]

This direction might have been a better choice of words. As I mention above, the TESTER board is the one implementing the GATT server. The RESPONDER board (or DUMMY board if you want) receives notifications from the TESTER board, with the data. The RESPONDER board (the GATT client) can read/write the characteristics of the GATT server. This way you are able to send data both ways between the boards.

[RoomBee]

Oh. It seems I'm misunderstanding. When two board were connected ( one is central and one peripheral). Which is the server? Can you clarify this? Thanks!!!!

[RoomBee]

Help me please! I can't difference server and client in the example. Which is different between them?