Connection supervisory timeout limits for \nRF5_SDK_15.0.0_a53641a\examples\ble_peripheral\ble_app_uart\

[Baruch]

  #define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)             /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
//  #define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(3, UNIT_10_MS)                /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */

Above you can see the original and commented out modified code for the given example. The modification causes crush to  

NRF_BREAKPOINT_COND;    // On assert, the system can only recover with a reset.

What is the issue: my settings are out of boundaries or this example has different allowed limits and what are they then?

Thanks.

[Edvin]

It is defined in the bluetooth spec:

https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.gap.peripheral_preferred_connection_parameters.xml

 

Besides, setting a connection supervision timeout shorter than the connection interval wouldn't make any sense, because the connection would time out even if no packets are lost.

 

Best regards,

Edvin