#define MIN_CONN_INTERVAL MSEC_TO_UNITS(400, UNIT_1_25_MS)

[liuyanfeng]

Minimum connection interval, MSEC_TO_UNITS(400, UNIT_1_25_MS) why 0.4S?

MSEC_TO_UNITS ()

follows

#define MSEC_TO_UNITS(TIME, RESOLUTION) (((TIME) * 1000) / (RESOLUTION))

Bring it in. It's 320, not 0.4s

Guide me, thank you!

[Vidar Berg]

Hello,

The time is given in units of 1.25 ms as per the Bluetooth specification. Thus, the value '320' corresponds to 400 ms (320 * 1.25 ms). Does this answer your question?  

[liuyanfeng]

MSEC_TO_UNITS(400, UNIT_1_25_MS)             400*1000 /1250 = 320  ，

[Vidar Berg]

Sorry, but I don't see a question here. What are you trying to achieve? Like I said in my previous response, '320' corresponds to a connection interval of 400 ms.