b

bool SimpleCentral_doGattWrite(uint8_t index)
{
    uint8_t charVals[4] = { 0x00, 0x55, 0xAA, 0xFF };
                       //    0,   85,   170,  255
    //int writes = 0;

    while(index < 4){

        status_t status;

        attWriteReq_t req;
        req.pValue = GATT_bm_alloc(scConnHandle, ATT_WRITE_REQ, 1, NULL);

        if ( req.pValue != NULL )
        {
          uint8_t connIndex = SimpleCentral_getConnIndex(scConnHandle);

          // connIndex cannot be equal to or greater than MAX_NUM_BLE_CONNS
          SIMPLECENTRAL_ASSERT(connIndex < MAX_NUM_BLE_CONNS);

          req.handle = connList[connIndex].charHandle;
          req.len = 1;
          charVal = charVals[index];
          req.pValue[0] = charVal;
          req.sig = 0;
          req.cmd = 0;

          status = GATT_WriteCharValue(scConnHandle, &req, selfEntity);
          if ( status != SUCCESS )
          {
            GATT_bm_free((gattMsg_t *)&req, ATT_WRITE_REQ);
          }
        }

        Display_printf(dispHandle, SC_ROW_CUR_CONN, 0, "Byte %d ",  index);

       // writes++;
        index++;
        Task_sleep(500 * (1000 / Clock_tickPeriod));
    }

  return (true);
}