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4 years, 8 months ago.
How to increase MTU SIZE?(STM,NUCLEO-WB55)
App's MTU size chaged(gatt.requestMTU)
but Board's MTU SIZE is not CHANGED.
HOW to change MTU SIZE?
1 Answer
4 years, 7 months ago.
Hi Shin,
You can refer to this question
https://os.mbed.com/questions/86315/Max-Size-Allowed-for-a-GATT-Characterist/
MTU size is able to be configured via mbed_app.json.
Regards, Desmond
thank you, Chen
I tried to apply your help to my code.
and I checked that a part of problem is solved.
but I can not solve that totally.
I request MTU SIZE to 512.(Phone'side)
and I also setted up MTU SIZE to 512 at Board.
as a result of checking 'onDataLengthChange",
Data length changed on the connection 1. Maximum sizes for over the air packets are: 251 octets for transmit and 27 octets for receive. update enabled on handle 14 Data length changed on the connection 1. Maximum sizes for over the air packets are: 251 octets for transmit and 70 octets for receive.
I don't know why LOG happens twice(phone request MTU Resize once)
and MTU result is 70 octets.
plz help me how to maximize MTU SIze.
posted by 23 Aug 2019