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What is min BLE latency?

Hi,

I'm on the project where I use SoftDevice s132 on my own devBoard with nrf52 chip. I know for Connection Interval and other parameters that determin BLE communication. I know that min connection interval is 7.5ms (I'm using that) but I need to know more about latency. By latency I mean time required for package to come from my BLE transmiter to receiver.

I tried to synchronize two nrf chips using timers and then measure the time I'm looking for but results were very strange: the time was between 0.5ms and up to 20ms (with the same connection interval 7.5ms)- mostly around 8.5ms.

According to some documentation it's possible to send up to 6 packets in one connection interval. My conn. interval is 7.5ms which means it's required at least 1.25ms for one packet. Is that right? If so, what happens after connection interval time? Rescanning and reconnection? How much time for that?

Thank you.

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