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CC1352P: Low Data Frequency / Data Loss

Part Number: CC1352P
Other Parts Discussed in Thread: CC2652P, BLE-STACK

Hi,

I am using a CC352P to get data from 4 slaves CC2652P.


I am getting data in 10ms time period and the size of data is around 20 Bytes. 

I faced reconnection issues when using 12.5 - 15 ms on peripheral side for all devices.

I used the following settings

PERIPHERAL:
Update Connection Parameter 12.5(min) - 42.5 ms (max) for 4 slaves.
MAX No of PDUs - 5
MAX SIZE OF PDU - 69

CENTRAL:
Connection Interval - 12.5(min) - 42.5(max)
Update Connection Parameter 12.5(min) - 42.5 ms (max) 
MAX No of PDUs - 5
MAX SIZE OF PDU - 69

Now all my peripheral are able to connect properly and reconnection is also proper but I am getting less data.
I saw the frequency of data is less. I am expecting around 95-98% data but I can only see around 77-84% data with 12.5(min) - 42.5(max)  .
Also if I use 3 or 2 Peripheral I get 98% (Good Frequency) with 12.5(min) - 42.5(max).


What could e the reason for this how can I resolve this issue. Is there any way to increase this percentage. 

Note: My data frequency is best 98% while using connection interval of 12.5 - 15 peripheral side but I am facing reconnection issues. 

Regards,
Ankit Tomar