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How to Write Attributes larger than 1byte

Tony Green
Prodigy 40 points

Hi,

I'm trying to modify the SimpleBLEPeripheral to change Characteristic 1 from a single byte into a 16 byte array.  I have successfully configured it to be initialised and it reads OK, but get an error when trying to write 16 bytes.  Write permissions are enabled.  I can see that I'm getting erors because the existing source code is configured for single byte write only. Are there any examples I can look at which succesfully write an array?

regards

Tony Green

  • 0
    Intellectual 625 points

    Hi,

    In the same application, characteristic 5 is 5 bytes of array. You can look at it.

  • 0
    Genius 4125 points

    Have you checked simpleGATTprofile.c? SimpleProfile_SetParameter has length checks for each char that need to be updated. Also there are a number of points that single byte copies need to be changed to array copies in this file and others within the project.

  • 0 in reply to Eng351
    Prodigy 40 points

    Thanks Eng351,

    There were a number of hurdles but we got there in the end using the memcpy function, but the real culprit was the callback and 'notifyapp' which copies the pointer to the array for your application to use - it's currently set a s a pointer to a char but now needs to point to a char array, this was causing the application to crash.