Dialog Semiconductor customer support - MTU packet connection interval https://support.dialog-semiconductor.com/resource-keywords/mtu-packet-connection-interval en A question about MTU https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-software/question-about-mtu

Hi Dialog,
I have a question about MTU.
I want to send a file from mobile to DA14585.
If I set max_mtu of DA14585 to 255, and every time the app sends 240 bytes to DA14585 until the file has been transmitted.
The connection interval is 40ms, I am not sure how many packets (maybe 6?) per connection interval.
Each packet contains 20 bytes, right?
6 packets * 20 bytes = 120 bytes, so 240 bytes should be sent about 80 ms, is that true?
I use a debug pin to estimate, we find that DA14585 receives 240 bytes data just about every 40 ms, why?

Thanks.

Device: 
Tue, 28 Nov 2017 05:07:39 +0000 stanley_yeh 118692 at https://support.dialog-semiconductor.com https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-software/question-about-mtu#comments