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NRF51822 and CSR4.0 dongle is not connection.

I use NRF51822 Bluetooth 4.0 e-val kit. souce code is peripheral example. so, android smart phone and NRF51822 is connection. result, Pairing success. occur On_ble_evt fuction callback in source code.

but, NRF51822 and CSR4.0 dongle(bluetooth 4.0) is not connection. No occur On_ble_evt_function callback in source code. Do you know what is the problem?

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