nrf51822 Central disconnection problem

[Aymen Rejeb]

Hi all,

Using nRF51422 on nRF51-DK as a Central I have been successfully connected to a non-Nordic BLE peripheral, however when using the ISP130301 chip that embedding an nRF51822_CEAA (256 Ko/ 16 Ko) the Central is being disconnected with the 0x8 (BLE_HCI_CONNECTION_TIMEOUT) or 0x3E (BLE_HCI_CONN_FAILED_TO_BE_ESTABLISHED) disconnection reasons.

Could anyone please give a hint here! what could be the reason of the disconnection?

This is the Wireshark trace file: trace.pcapng

nRF51822 Revision:

Debugging the disconnection:

ble_app_uart_c trace: trace_27_07_16.pcapng

ISP schematic:

ISP picture

[Aymen Rejeb]

Actually when running the central on nRF51-DK (PCA10028) everything is working fine, the peripheral never disconnects! The trace I provided is for central on ISP130301, I'm using:

• Softdevice: s130_nrf51_1.0.0_softdevice
• SDK: nRF51_SDK_10.0.0_dc26b5e
• nRF51822 revision: please see attached screenshot (using nrf_ic_info_get function)

To connect to the peripheral I'm using the the ble_app_uart_c project from the SDK (after made few modifications on the code and the project settings), I have attached the project you can take a look on it, maybe it could help!

I have already checked that no hard fault neither a reset is happening! I was using Keil for debugging this and to see the disconnection reason (see above attached screenshot)

Thank you