Many packages are sent while the previous package has not been processed yet

Question

hello, i am trying an example of a Node running multi-peripheral with ble_nus service. I have a question: Suppose when Node receives a packet from central A, Node will call ble_nus_handler and in this handler, Node will send that packet via UART. While sending UART, ie the handler function has not been completed, there are many Central B, C, ... send other packets to. How will these packets be handled? Are they lost?

Einar Thorsrud · Accepted Answer

Hi, 
 The packet form central B will be lost if the connection events overlap. If not, then it will be queued and process when the firs packet is processed. This is essentially just a matter of interrupt priorities. The event will be handled as soon as any same of higher priority handler has finished.

Many packages are sent while the previous package has not been processed yet

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