Minimum connection interval

[Jorge]

Hi all,

Does in any chip with some constellation (different SD) the device allows less than 7.5ms for the connection interval? Or is this value the absolute minimum?

[Sigurd]

Hi,

The 7.5ms limit is defined by the Bluetooth Specification. From the BLUETOOTH SPECIFICATION Version 5.0 | Vol 6, Part B (page 2683):

The connInterval shall be a multiple of 1.25 ms in the range of 7.5 ms to 4.0 s.

[Sigurd]

Yes, the nRF5 series chips can achieve much lower latency than 7.5 ms. It's the BLE Specification that set's this limit. If you go proprietary(e.g. use ESB) you can achieve latency down to at least 0.5 ms.