About CC2541 to get central device RSSI value (BLE 1.4.0 stack)

Hi,

In my current project HIDEmuKbd (using CC2541), I need to get central device RSSI value.

If using BLE 1.4.0 stack, I can read an RSSI value with a callback, but the RSSI value is not immediately (after pairing), the central device need to send some data (and it must be a central device).

If central device does not data packet transmission, the RSSI value will not change.

However, the use of old BLE 1.3.2 stack, without this situation.

How can i fix it ? in the BLE 1.4.0 version firmware.

Firmware like below:

uint16 rssi_read_rate = 500;

GAPRole_SetParameter( GAPROLE_RSSI_READ_RATE, sizeof( uint16 ), &rssi_read_rate );

static gapRolesCBs_t PeripheralCBs =
{
     peripheralStateNotificationCB,           
     peripheralRSSINotificationCB,
};

static void peripheralRSSINotificationCB( int8 newRSSI ) {

   // Get RSSI value

}