Configurable ATT MTU

RE: Configurable ATT MTU

Sigurd — Wed, 22 Nov 2017 10:18:11 GMT

You might be confusing long writes and long ATT MTU ? See this post.

RE: Configurable ATT MTU

endnode — Wed, 22 Nov 2017 07:36:34 GMT

What 3seconds? What 1500? Most of your write-ups doesn't make sense.

RE: Configurable ATT MTU

milav — Wed, 22 Nov 2017 01:47:02 GMT

Actually this 3 sec ....arrive coz of two change...

in peripheral side we enable only write wo response...
and set Android side MTU size....1500....

I will send you....the snapshot of that Android code..

RE: Configurable ATT MTU

endnode — Tue, 21 Nov 2017 19:14:10 GMT

Where in the app you see setting MTU to 1500????

RE: Configurable ATT MTU

milav — Tue, 21 Nov 2017 18:19:06 GMT

We just copy ...nrf toolbox UART app....

RE: Configurable ATT MTU

endnode — Tue, 21 Nov 2017 18:13:27 GMT

Devices will settle on lower from two maximums so if one device supports max 23 the ATT_MTU stays on 23. Also how you can set MTU size through Android API and what stack supports such high value (1500)? Sounds pretty unreal.

RE: Configurable ATT MTU

milav — Tue, 21 Nov 2017 17:41:59 GMT

Any changes is to be done in Android app?

I change ATT MTU request to be...1500 in Android...side.....we receive....2912 bytes in 3 sec....

Is this congratulation correct?

RE: Configurable ATT MTU

endnode — Tue, 21 Nov 2017 17:35:24 GMT

(or try to go with other stack than Nordic Soft Device, there might be some luck with Zephyr or Mynewt...)

RE: Configurable ATT MTU

Sigurd — Tue, 21 Nov 2017 17:22:56 GMT

It's a documentation bug, it's not listed in e.g. the corresponding "Key features" section in the PDF document here(S130 SDS). If Configurable ATT MTU is needed, switch to nRF52832.

RE: Configurable ATT MTU

John — Tue, 21 Nov 2017 16:52:54 GMT

I'm not sure this is correct. I just took a quick look at the Nordic website documentation. Under the nRF51 soft devices, the S130 indicated it supported Bluetooth 4.2 with configurable ATT MTU.

RE: Configurable ATT MTU

endnode — Tue, 21 Nov 2017 14:44:57 GMT

Not with Nordic stack as far as I understand, all S110/120/130 versions support only default ATT_MTU size (for memory reasons - it requires certain amount of RAM).