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BLE Simple Profile Characteristic change value

Nav.Dev
Expert 1290 points


Hi All,

I have question about BLE simple profile parameters:

In the simple gatt profile example we have setting of charecters:

// Characteristic 5 Value
static uint8 simpleProfileChar5[SIMPLEPROFILE_CHAR5_LEN] = { 0, 0, 0, 0, 0 };


// Simple Profile Characteristic 5 User Description
static uint8 simpleProfileChar5UserDesp[17] = "Characteristic 5";

I changed the line of profilechar5 to: static uint8 simpleProfileChar5[SIMPLEPROFILE_CHAR5_LEN] = "abcd";

When i tried to read the value i get the same value even after i changed the values to abcd:

  • 0
    TI__Guru 56405 points

    Which one are you trying to change? It sounds to me that you want to change User Description but however your code shows you are trying to change values stored in characteristic 5 from 1 2 3 4 5 to something that's not legal.

    // Simple Profile Characteristic 5 User Description

    static uint8 simpleProfileChar5UserDesp[sizeDefineByYou] = "string";

  • 0 in reply to Christin Lee
    Expert 1290 points
    Thanks Christin,

    I want to change the value that stored in characteristic 5.

    Why it's not legal?

    The purpose of this characteristic is to unpack data that stored in the sensor tag like temperature history for the last 30 days, the value of characteristic 5 changed each time i send 1 packet will be the next packet.
  • 0 in reply to Nav.Dev
    TI__Guru 56405 points
    Sorry I missed understand you. In order to change the value you need to go into SimpleBLEPeripheral_init() function. The values are set again there. You are just changing the default value in your code, but forget to take care of other place that calls SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR5, SIMPLEPROFILE_CHAR5_LEN,
    charValue5);