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case about Delay time of data transmission

peter.min

Hi,

1.I want to know the minimum delay time of BLE data transmission

2.How should this time be calculated

Thank you for all your assistance.
Kind regards,
Peter.Min

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  • +1

    Hi,

    If you are in a connection, the delay before the transmission depend on the connection parameters and in particular the connection interval. The lowest possible connection interval is 7.5 ms, but it is the central device which decides what connection parameters to use and with a smartphone you can typically get connection intervals of 20 ms an upwards. The worst case delay before transmitting is one full connection interval.

    If the connection has slave latency, then a given number of connection intervals may happen without the peripheral listening to the event. In that case, for transmissions from the central to the peripheral the peripheral may wait for slave latency number of connection intervals before attempting to receive the transmission.

    Regards,
    Terje

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  • +1

    Hi,

    If you are in a connection, the delay before the transmission depend on the connection parameters and in particular the connection interval. The lowest possible connection interval is 7.5 ms, but it is the central device which decides what connection parameters to use and with a smartphone you can typically get connection intervals of 20 ms an upwards. The worst case delay before transmitting is one full connection interval.

    If the connection has slave latency, then a given number of connection intervals may happen without the peripheral listening to the event. In that case, for transmissions from the central to the peripheral the peripheral may wait for slave latency number of connection intervals before attempting to receive the transmission.

    Regards,
    Terje

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