nRF52 iOS UART application disconnects with 60 characters

[ajlennon]

Hi,

I am using nRF52 + Eclipse (gcc) with the ble_app_uart application.

I have an iPhone 6+ with nRF UART app running.

If I send <= 59 characters through the virtual UART they appear in the app log.

If I send >= 60 characters the nRF UART app immediately logs a connection with error code 6

[Edit: To add to that I am seeing the "Start..." message on the virtual UART which presumably indicates the app has reset]

Can anybody suggest where the problem lies please?

[ajlennon]

I think I see the problem.

app_error_handler() is being called which is resulting in a call to NVIC_SystemReset()

The error code is 0x3004 which seems to be detailed here

devzone.nordicsemi.com/.../

i.e. BLE_ERROR_NO_TX_BUFFERS

So it seems that the UART example needs to ensure it has free buffers before attempting to send the data...