How do you implement bypass discovery to access a feature?

Question

It's NRF52832 and NRF52810. 
 The BLE connection process is to establish a physical connection first and then discover the service to obtain the characteristic word information. 
 I want to reduce the time of connection so I want to get rid of the discovery service. 
 Because these features are consistent. 
 I have now made it possible for the host to send the data from the machine, but it can't receive the reply host from the machine to the host. 
 Because I always report busy when I can notif. 
 So now you can't have notif.

zzmNO1 · Accepted Answer

The reason for the behavior is that the GATT module initiates a MTU exchange upon the event BLE_GAP_EVT_CONNECTED. When trying to enable notifications,the MTU exchange is ongoing,and hence,ble_nus_c_tx_notif_enable() returns NRF_ERROR_BUSY. 
 Enabling notifications when the MTU exchange has finished,solves the problem.(Upon the event BLE_GATTC_EVT_EXCHANGE_MTU_RSP).

Mttrinh · Answer

Hi, 
 I suggest you to have a look at this and this post.

How do you implement bypass discovery to access a feature?

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