NO_MEM error with multi-peripheral BLE connection case questions

[Yclee]

Hello,

I am tested multi-channel BLE peripheral connections.
(ble_app_uart example with saadc example.)

When I am testing 2-channel, it works well.

However, when I am trying to more than 3(final goal is 4),

NO_MEM error is occured in

ble_nus_chars_received_uart_print function.

I am try to size up the RAM(size, start address) but it doesn't work.

And I am finding the MTU size or other setting, I don't know which parameter or variable should be modified.

Thanks for reading my quesions.

Best Regards,

Yclee.

[Simonr]

Yclee said:

I am using nRF52832 DK module with master module

 What do you mean by this? Are you using an nRF52832 DK, and what is this "master module"? Can you use the Programmer app in nRFConnect (or the IDE of your choice) to see how much of the memory is used by the application in the first place.

Can you also provide a code snippet of what lines in your main.c are returning this error (the function containing line 240 in main.c according to your error message).

Best regards,

Simon

[Yclee]

Yes, I am using 52832 DK as master module(central), and breakout board 52832 uses as slave(peripheral). 

I see the memory usage as below.

 

And I am modify the code which is before

NRF_ERROR_BUSY to MEM.

if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_NO_MEM) && (ret_val != NRF_ERROR_INVALID_STATE))

And the 3rd, 4th module connect well without any error message.

I am really appreciate for your help and comment.

Best Regards,

Yclee.