ble_app_uart: Unique connection between a specific central and a specific peripheral

[Bar1]

Hi All,

I have more boards on which I have loaded the code ble_app_uart_c (nRF5_SDK_15.2.0_9412b96) which I use as central devices and I have other boards on which I have loaded the ble_app_uart code which I use as peripherals.

The boards taken in pairs (one with the code ble_app_uart_c and the other with ble_app_uart) work perfectly. The problem arises when I want to have more pairs of boards working at the same time, because I risk a central connection with the wrong peripheral and so on.

Is there a way, modifying the code, that allows the unique connection between a specific central and a specific peripheral?

Thanks in advance for your time.

[Jimmy Wong]

Hi, 

you can use the device name as the scanning filter for the connection.

for example, I did the example on the peripheral and central role (both device) 

github.com/.../main.c

static char const m_target_periph_name[] = "Peripheral_PER";

for the SDK 15.3, it has the scan module to easy configure.

// <e> NRF_BLE_SCAN_FILTER_ENABLE - Enabling filters for the Scanning Module.
//==========================================================
#ifndef NRF_BLE_SCAN_FILTER_ENABLE
#define NRF_BLE_SCAN_FILTER_ENABLE 1
#endif
// <o> NRF_BLE_SCAN_UUID_CNT - Number of filters for UUIDs.
#ifndef NRF_BLE_SCAN_UUID_CNT
#define NRF_BLE_SCAN_UUID_CNT 0
#endif

// <o> NRF_BLE_SCAN_NAME_CNT - Number of name filters.
#ifndef NRF_BLE_SCAN_NAME_CNT
#define NRF_BLE_SCAN_NAME_CNT 1
#endif

// <o> NRF_BLE_SCAN_SHORT_NAME_CNT - Number of short name filters.
#ifndef NRF_BLE_SCAN_SHORT_NAME_CNT
#define NRF_BLE_SCAN_SHORT_NAME_CNT 0
#endif

// <o> NRF_BLE_SCAN_ADDRESS_CNT - Number of address filters.
#ifndef NRF_BLE_SCAN_ADDRESS_CNT
#define NRF_BLE_SCAN_ADDRESS_CNT 0
#endif

// <o> NRF_BLE_SCAN_APPEARANCE_CNT - Number of appearance filters.
#ifndef NRF_BLE_SCAN_APPEARANCE_CNT
#define NRF_BLE_SCAN_APPEARANCE_CNT 0
#endif

// </e>

[Bar1]

Hi Jimmy,

I was able to solve the problem thanks to you .

Thanks a million again.