Writing characteristic fails with bad parameter

[jimmy11]

Hello all,

Working on communication between two STM32WB55 boards , one configured as client , and one as server.

When trying to write a characteristic I get a bad parameter error, but when I use the write characteristic long command it works fine.

Writing a small amount of bytes works on both commands.

MTU discussed: 0xFB > size of write ( 0x5E).

What can be the issue?

Thanks!

[Issamos · Accepted solution]

Hello @jimmy11 

Are you sure of this information:

• MTU discussed: 0xFB

Best regards .

II

[jimmy11]

Thanks, when I used the the MTU exchange command it solved the issue

[Issamos]

Happy to now that you're problem has been solved.

Please close the topic by choosing a best answer.

Best regards.

II