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After the bonding device is disconnecting when sending continuous stream of data

NIDHIN K

I'm  using nrf51822 and SDK 10, S110 Softdevice. Implemented whitelist using device manager and bonded with single device , after bonded my device with phone (using nrfconnect app) start sending continuous stream of data (MIN_CONN_INTERVAL =8.75, MAX_CONN_INTERVAL =11.25) and sending 20bytes of data in 1ms interval , after sending some amount of data the device become disconnecting (Error 61(0x3d) BLE_HCI_CONN_TERMINATED_DUE_TO_MIC_FAILURE, . So i need to reconnect again but same thing will happening after sending some amount of data its again disconnect. So my overall throughput decreased. If im deleting bond information from phone side then there is no any issue.

1. Why this device disconnecting frequently ??

I know this is because of loading incorrect peripheral key but  i dont know why its loading incorrect key. because im not loading any keys in my firmware.

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