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CCS/CC2650STK: Advertisement period after connection

Frederic Griffe
Expert 1745 points
Part Number: CC2650STK

Tool/software: Code Composer Studio

On the CC2650STK sensortag I would like to reduce the time the sensortag is advertizing (green led blinking) AFTER a connection with a central device is terminated.

On the sensortag firmware this period is about 30s. I would like to reduce it to 2s.

Kind regards.

Frederic

  • 0
    TI__Guru 56590 points

    Hello Frederic,

    You can for example change the advertising interval in processStateChangeEvt for case GAPROLE_CONNECTED. Refer to the GapRole_setparameter function.

    // Set advertising interval
{
uint16_t advInt = DEFAULT_ADVERTISING_INTERVAL;

GAP_SetParamValue(TGAP_LIM_DISC_ADV_INT_MIN, advInt);
GAP_SetParamValue(TGAP_LIM_DISC_ADV_INT_MAX, advInt);
GAP_SetParamValue(TGAP_GEN_DISC_ADV_INT_MIN, advInt);
GAP_SetParamValue(TGAP_GEN_DISC_ADV_INT_MAX, advInt);
}

  • 0 in reply to Eirik V
    Expert 1745 points
    Hello Eirik,
    Thanks for your answer.
    I have seen that I can change these parameters and some others.
    But my question is what is the exact parameter I have to change to reduce the time during which the green led blinks (and consumption is high) after a connection has ended.
    Kind regards.
    Frederic
  • 0 in reply to Frederic Griffe
    TI__Guru 56590 points

    Hello Frederic,

    To control advertise duration change the GAP parameters TGAP_LIM_ADV_TIMEOUT or TGAP_GEN_DISC_ADV_MIN depending on type of advertising mode (general by default, but the sensortag code use limited discoverable).

    // Set timeout for limited discoverable mode.
GAP_SetParamValue( TGAP_LIM_ADV_TIMEOUT, 2000);
// Set timeout for general discoverable mode.
GAP_SetParamValue( TGAP_GEN_DISC_ADV_MIN, 2000);

    The GAPRole parameters advertOffTime is the time that advertising will remain off until it turns back on. Default is set to 0 which means it will never restart after the timeout. advertOffTime  is handled by the GAP Role in peripheral.c:

    else // GAP_END_DISCOVERABLE_DONE_EVENT
{
 if (gapRole_AdvertOffTime != 0)
 {
   if ((gapRole_AdvEnabled) || (gapRole_AdvNonConnEnabled))
   {
     Util_restartClock(&startAdvClock, gapRole_AdvertOffTime);
   }

    The green LED blink in sensortag.c:

    Whenever the state is GAPROLE_ADVERTISING there is a ST_PERIODIC_EVT timer periodically triggered (Util_startClock(&periodicClock);) in the main task function.  For every iteration the green led will blink once (SensorTagIO_blinkLed(IOID_GREEN_LED, 1);)