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LAUNCHXL-CC26X2R1: NPI usage

Part Number: LAUNCHXL-CC26X2R1

Tool/software:

Hello,

I want to transfer data through an external MCU board to the Bluetooth buffer, through SPI and then I need to transfer the same received data through Bluetooth to other devices. Should I have to use NPI network for this application?

Thank you.

  • Hi,

    NPI could be an option for the architecture you are describing, but typically it is used when you want an external MCU to control the BLE device. Another option would be to use a UART over BLE example such as the serial socket examples listed below:

    https://github.com/TexasInstruments-Sandbox/ble_examples/tree/simplelink_cc13x2_26x2_sdk-5.10/examples/rtos/CC26X2R1_LAUNCHXL/ble5apps/simple_serial_socket_server

    https://github.com/TexasInstruments-Sandbox/ble_examples/tree/simplelink_cc13x2_26x2_sdk-5.10/examples/rtos/CC26X2R1_LAUNCHXL/ble5apps/simple_serial_socket_client

    Best Regards,

    Jan

  • Hi,

    I am not able to import the files. I am getting an error as incompatible version . Can you please provide the latest version code example.

    I am using CCS v.12. and CC26xx SDK v8.3.

    Thank you.

  • Hi,

    My apologies, those examples are available on the 5.10 SDK release. You will need to port them up to the 8.30 if you want to use the latest SDKs. We offer version to version migration guides that will help in bringing the project up to the desired SDK version.

    Best Regards,

    Jan

  • Hi,

    Can you please provide the link to transfer this file to sdk 8.30v.

    Thank you.

  • Thank You, it helped me resolve the issue.

    There one more issue for clarification. After transmitting the data continuously from through ble continuously through peripheral device, is there a provision to continuously read and display the data in the central device without the button use for GATT read?

    Best Regards.

  • Hi,

    If you are unable to modify the peripheral, then you must continuously call GATT_read(). However, if you can modify the peripheral, then you can change the characteristic to have the notify property, make the central subscribe to the characteristics and send a notification after each update. This will automatically notify the application code of the central device and prevent having to call gatt_read() repeatedly.

    Best Regards,

    Jan

  • Hi,
    I called the GATT_read() continuously in central device. But the problem is, if send 64-bit data from the peripheral, how to display the same data in the central device?

    Best Regards.

  • Hi,

    You should be able to send and received 64-bit data in a BLE connection. However, you must ensure that the characteristic you are read/writing has a data length of atleast 64 bytes.

    Best Regards,

    Jan

  • Hi, 

    I am using Set_Parameter() function to transmit the value from peripheral device to central device. I even changed the datatype of character1 value to 16-bit, but I am not able to read the 16-bit  data (able to read only 8-bit data) in the central device. 

    How to transmit and read 16bit data?

    Note: I am transferring the data from uart rxBuffer (rxBuffer can carry 16bit confirmed using watch window) to Set_Parameter.

    Best Regards.

  • Hi,

    How are you reading the parameter? As a quick test, can you write the 16-bit data and attempt to read it using SimpleLink Connect? This will help us isolate the behavior to either the central or peripheral side.

    Best Regards,

    Jan

  • Hi, 

    I am reading through calling continuous Gatt_Read function in central device. I tried reading through SimpleLink Connect. I am able read only 8-bit value there.

    Best Regards.

  • Hi,

    Can you share your profile code to see if there may be something we are missing there?

    Best Regards,

    Jan

  • Hi, 

    Gatt_profile code is attached below. I want to transfer 16-bit value in only characterstic:1. And I am using only Set_Parameter function.

    #include <string.h>
    #include <icall.h>
    #include "util.h"
    /* This Header file contains all BLE API and icall structure definition */
    #include "icall_ble_api.h"
    
    #include "simple_gatt_profile.h"
    
    #ifdef SYSCFG
    #ifdef USE_GATT_BUILDER
    #include "ti_ble_gatt_service.h"
    #endif
    
    #endif
    
    /*********************************************************************
     * MACROS
     */
    
    /*********************************************************************
     * CONSTANTS
     */
    #ifndef USE_GATT_BUILDER
    
    #define SERVAPP_NUM_ATTR_SUPPORTED        17
    
    /*********************************************************************
     * TYPEDEFS
     */
    
    /*********************************************************************
     * GLOBAL VARIABLES
     */
    // Simple GATT Profile Service UUID: 0xFFF0
    CONST uint8 simpleProfileServUUID[ATT_BT_UUID_SIZE] =
    {
      LO_UINT8(SIMPLEPROFILE_SERV_UUID), HI_UINT16(SIMPLEPROFILE_SERV_UUID)
    };
    
    // Characteristic 1 UUID: 0xFFF1
    CONST uint8 simpleProfilechar1UUID[ATT_BT_UUID_SIZE] =
    {
      LO_UINT8(SIMPLEPROFILE_CHAR1_UUID), HI_UINT16(SIMPLEPROFILE_CHAR1_UUID)
    };
    
    // Characteristic 2 UUID: 0xFFF2
    CONST uint8 simpleProfilechar2UUID[ATT_BT_UUID_SIZE] =
    {
      LO_UINT8(SIMPLEPROFILE_CHAR2_UUID), HI_UINT16(SIMPLEPROFILE_CHAR2_UUID)
    };
    
    // Characteristic 3 UUID: 0xFFF3
    CONST uint8 simpleProfilechar3UUID[ATT_BT_UUID_SIZE] =
    {
      LO_UINT8(SIMPLEPROFILE_CHAR3_UUID), HI_UINT16(SIMPLEPROFILE_CHAR3_UUID)
    };
    
    // Characteristic 4 UUID: 0xFFF4
    CONST uint8 simpleProfilechar4UUID[ATT_BT_UUID_SIZE] =
    {
      LO_UINT8(SIMPLEPROFILE_CHAR4_UUID), HI_UINT16(SIMPLEPROFILE_CHAR4_UUID)
    };
    
    // Characteristic 5 UUID: 0xFFF5
    CONST uint8 simpleProfilechar5UUID[ATT_BT_UUID_SIZE] =
    {
      LO_UINT8(SIMPLEPROFILE_CHAR5_UUID), HI_UINT16(SIMPLEPROFILE_CHAR5_UUID)
    };
    
    /*********************************************************************
     * EXTERNAL VARIABLES
     */
    
    /*********************************************************************
     * EXTERNAL FUNCTIONS
     */
    
    /*********************************************************************
     * LOCAL VARIABLES
     */
    
    static simpleProfileCBs_t *simpleProfile_AppCBs = NULL;
    
    /*********************************************************************
     * Profile Attributes - variables
     */
    
    // Simple Profile Service attribute
    static CONST gattAttrType_t simpleProfileService = { ATT_BT_UUID_SIZE, simpleProfileServUUID };
    
    
    // Simple Profile Characteristic 1 Properties
    static uint16 simpleProfileChar1Props = GATT_PROP_READ | GATT_PROP_WRITE;
    
    // Characteristic 1 Value
    static uint16 simpleProfileChar1 = 0;
    
    // Simple Profile Characteristic 1 Configuration
    static gattCharCfg_t *simpleProfileChar1Config;
    
    // Simple Profile Characteristic 1 User Description
    static uint8 simpleProfileChar1UserDesp[17] = "Characteristic 1";
    
    
    // Simple Profile Characteristic 2 Properties
    static uint8 simpleProfileChar2Props = GATT_PROP_READ;
    
    // Characteristic 2 Value
    static uint8 simpleProfileChar2 = 0;
    
    // Simple Profile Characteristic 2 User Description
    static uint8 simpleProfileChar2UserDesp[17] = "Characteristic 2";
    
    
    // Simple Profile Characteristic 3 Properties
    static uint8 simpleProfileChar3Props = GATT_PROP_WRITE;
    
    // Characteristic 3 Value
    static uint8 simpleProfileChar3 = 0;
    
    // Simple Profile Characteristic 3 User Description
    static uint8 simpleProfileChar3UserDesp[17] = "Characteristic 3";
    
    
    // Simple Profile Characteristic 4 Properties
    static uint8 simpleProfileChar4Props = GATT_PROP_NOTIFY;
    
    // Characteristic 4 Value
    static uint8 simpleProfileChar4 = 0;
    
    // Simple Profile Characteristic 4 Configuration Each client has its own
    // instantiation of the Client Characteristic Configuration. Reads of the
    // Client Characteristic Configuration only shows the configuration for
    // that client and writes only affect the configuration of that client.
    static gattCharCfg_t *simpleProfileChar4Config;
    
    // Simple Profile Characteristic 4 User Description
    static uint8 simpleProfileChar4UserDesp[17] = "Characteristic 4";
    
    
    // Simple Profile Characteristic 5 Properties
    static uint8 simpleProfileChar5Props = GATT_PROP_READ;
    
    // 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";
    
    /*********************************************************************
     * Profile Attributes - Table
     */
    
    static gattAttribute_t simpleProfileAttrTbl[SERVAPP_NUM_ATTR_SUPPORTED] =
    {
      // Simple Profile Service
      {
        { ATT_BT_UUID_SIZE, primaryServiceUUID }, /* type */
        GATT_PERMIT_READ,                         /* permissions */
        0,                                        /* handle */
        (uint16 *)&simpleProfileService            /* pValue */
      },
    
        // Characteristic 1 Declaration
        {
          { ATT_BT_UUID_SIZE, characterUUID },
          GATT_PERMIT_READ,
          0,
          &simpleProfileChar1Props
        },
    
          // Characteristic Value 1
          {
            { ATT_BT_UUID_SIZE, simpleProfilechar1UUID },
            GATT_PERMIT_READ | GATT_PERMIT_WRITE,
            0,
            &simpleProfileChar1
          },
    
    
          // Characteristic 1 User Description
          {
            { ATT_BT_UUID_SIZE, charUserDescUUID },
            GATT_PERMIT_READ | GATT_PERMIT_WRITE,
            0,
            simpleProfileChar1UserDesp
          },
    
        // Characteristic 2 Declaration
        {
          { ATT_BT_UUID_SIZE, characterUUID },
          GATT_PERMIT_READ,
          0,
          &simpleProfileChar2Props
        },
    
          // Characteristic Value 2
          {
            { ATT_BT_UUID_SIZE, simpleProfilechar2UUID },
            GATT_PERMIT_READ,
            0,
            &simpleProfileChar2
          },
    
          // Characteristic 2 User Description
          {
            { ATT_BT_UUID_SIZE, charUserDescUUID },
            GATT_PERMIT_READ,
            0,
            simpleProfileChar2UserDesp
          },
    
        // Characteristic 3 Declaration
        {
          { ATT_BT_UUID_SIZE, characterUUID },
          GATT_PERMIT_READ,
          0,
          &simpleProfileChar3Props
        },
    
          // Characteristic Value 3
          {
            { ATT_BT_UUID_SIZE, simpleProfilechar3UUID },
            GATT_PERMIT_WRITE,
            0,
            &simpleProfileChar3
          },
    
          // Characteristic 3 User Description
          {
            { ATT_BT_UUID_SIZE, charUserDescUUID },
            GATT_PERMIT_READ,
            0,
            simpleProfileChar3UserDesp
          },
    
        // Characteristic 4 Declaration
        {
          { ATT_BT_UUID_SIZE, characterUUID },
          GATT_PERMIT_READ,
          0,
          &simpleProfileChar4Props
        },
    
          // Characteristic Value 4
          {
            { ATT_BT_UUID_SIZE, simpleProfilechar4UUID },
            0,
            0,
            &simpleProfileChar4
          },
    
          // Characteristic 4 configuration
          {
            { ATT_BT_UUID_SIZE, clientCharCfgUUID },
            GATT_PERMIT_READ | GATT_PERMIT_WRITE,
            0,
            (uint8 *)&simpleProfileChar4Config
          },
    
          // Characteristic 4 User Description
          {
            { ATT_BT_UUID_SIZE, charUserDescUUID },
            GATT_PERMIT_READ,
            0,
            simpleProfileChar4UserDesp
          },
    
        // Characteristic 5 Declaration
        {
          { ATT_BT_UUID_SIZE, characterUUID },
          GATT_PERMIT_READ,
          0,
          &simpleProfileChar5Props
        },
    
          // Characteristic Value 5
          {
            { ATT_BT_UUID_SIZE, simpleProfilechar5UUID },
            GATT_PERMIT_AUTHEN_READ,
            0,
            simpleProfileChar5
          },
    
          // Characteristic 5 User Description
          {
            { ATT_BT_UUID_SIZE, charUserDescUUID },
            GATT_PERMIT_READ,
            0,
            simpleProfileChar5UserDesp
          },
    };
    #endif // USE_GATT_BUILDER
    /*********************************************************************
     * LOCAL FUNCTIONS
     */
    bStatus_t simpleProfile_ReadAttrCB(uint16_t connHandle,
                                              gattAttribute_t *pAttr,
                                              uint8_t *pValue, uint16_t *pLen,
                                              uint16_t offset, uint16_t maxLen,
                                              uint8_t method);
    bStatus_t simpleProfile_WriteAttrCB(uint16_t connHandle,
                                               gattAttribute_t *pAttr,
                                               uint8_t *pValue, uint16_t len,
                                               uint16_t offset, uint8_t method);
    #ifndef USE_GATT_BUILDER
    /*********************************************************************
     * PROFILE CALLBACKS
     */
    
    // Simple Profile Service Callbacks
    // Note: When an operation on a characteristic requires authorization and
    // pfnAuthorizeAttrCB is not defined for that characteristic's service, the
    // Stack will report a status of ATT_ERR_UNLIKELY to the client.  When an
    // operation on a characteristic requires authorization the Stack will call
    // pfnAuthorizeAttrCB to check a client's authorization prior to calling
    // pfnReadAttrCB or pfnWriteAttrCB, so no checks for authorization need to be
    // made within these functions.
    CONST gattServiceCBs_t simpleProfileCBs =
    {
      simpleProfile_ReadAttrCB,  // Read callback function pointer
      simpleProfile_WriteAttrCB, // Write callback function pointer
      NULL                       // Authorization callback function pointer
    };
    
    /*********************************************************************
     * PUBLIC FUNCTIONS
     */
    
    /*********************************************************************
     * @fn      SimpleProfile_AddService
     *
     * @brief   Initializes the Simple Profile service by registering
     *          GATT attributes with the GATT server.
     *
     * @param   services - services to add. This is a bit map and can
     *                     contain more than one service.
     *
     * @return  Success or Failure
     */
    bStatus_t SimpleProfile_AddService( uint32 services )
    {
      uint8 status;
    
      // Allocate Client Characteristic Configuration table
      simpleProfileChar1Config = (gattCharCfg_t *)ICall_malloc( sizeof(gattCharCfg_t) *
                                                                MAX_NUM_BLE_CONNS );
      if ( simpleProfileChar1Config == NULL )
      {
        return ( bleMemAllocError );
      }
    
      // Initialize Client Characteristic Configuration attributes
      GATTServApp_InitCharCfg( LINKDB_CONNHANDLE_INVALID, simpleProfileChar1Config );
    
      if ( services & SIMPLEPROFILE_SERVICE )
      {
        // Register GATT attribute list and CBs with GATT Server App
        status = GATTServApp_RegisterService( simpleProfileAttrTbl,
                                              GATT_NUM_ATTRS( simpleProfileAttrTbl ),
                                              GATT_MAX_ENCRYPT_KEY_SIZE,
                                              &simpleProfileCBs );
      }
      else
      {
        status = SUCCESS;
      }
    
      return ( status );
    }
    
    /*********************************************************************
     * @fn      SimpleProfile_RegisterAppCBs
     *
     * @brief   Registers the application callback function. Only call
     *          this function once.
     *
     * @param   callbacks - pointer to application callbacks.
     *
     * @return  SUCCESS or bleAlreadyInRequestedMode
     */
    bStatus_t SimpleProfile_RegisterAppCBs( simpleProfileCBs_t *appCallbacks )
    {
      if ( appCallbacks )
      {
        simpleProfile_AppCBs = appCallbacks;
    
        return ( SUCCESS );
      }
      else
      {
        return ( bleAlreadyInRequestedMode );
      }
    }
    
    /*********************************************************************
     * @fn      SimpleProfile_SetParameter
     *
     * @brief   Set a Simple Profile parameter.
     *
     * @param   param - Profile parameter ID
     * @param   len - length of data to write
     * @param   value - pointer to data to write.  This is dependent on
     *          the parameter ID and WILL be cast to the appropriate
     *          data type (example: data type of uint16 will be cast to
     *          uint16 pointer).
     *
     * @return  bStatus_t
     */
    bStatus_t SimpleProfile_SetParameter( uint8 param, uint16 len, void *value )
    {
      bStatus_t ret = SUCCESS;
      switch ( param )
      {
        case SIMPLEPROFILE_CHAR1:
          if ( len == sizeof ( uint16 ) )
          {
            simpleProfileChar1 = *((uint16*)value);
          }
          else
          {
            ret = bleInvalidRange;
          }
          break;
    
        case SIMPLEPROFILE_CHAR2:
          if ( len == sizeof ( uint8 ) )
          {
            simpleProfileChar2 = *((uint8*)value);
          }
          else
          {
            ret = bleInvalidRange;
          }
          break;
    
        case SIMPLEPROFILE_CHAR3:
          if ( len == sizeof ( uint8 ) )
          {
            simpleProfileChar3 = *((uint8*)value);
          }
          else
          {
            ret = bleInvalidRange;
          }
          break;
    
        case SIMPLEPROFILE_CHAR4:
          if ( len == sizeof ( uint8 ) )
          {
            simpleProfileChar4 = *((uint8*)value);
    
            // See if Notification has been enabled
            GATTServApp_ProcessCharCfg( simpleProfileChar4Config, &simpleProfileChar4, FALSE,
                                        simpleProfileAttrTbl, GATT_NUM_ATTRS( simpleProfileAttrTbl ),
                                        INVALID_TASK_ID, simpleProfile_ReadAttrCB );
          }
          else
          {
            ret = bleInvalidRange;
          }
          break;
    
        case SIMPLEPROFILE_CHAR5:
          if ( len == SIMPLEPROFILE_CHAR5_LEN )
          {
            VOID memcpy( simpleProfileChar5, value, SIMPLEPROFILE_CHAR5_LEN );
          }
          else
          {
            ret = bleInvalidRange;
          }
          break;
    
        default:
          ret = INVALIDPARAMETER;
          break;
      }
    
      return ( ret );
    }
    
    /*********************************************************************
     * @fn      SimpleProfile_GetParameter
     *
     * @brief   Get a Simple Profile parameter.
     *
     * @param   param - Profile parameter ID
     * @param   value - pointer to data to put.  This is dependent on
     *          the parameter ID and WILL be cast to the appropriate
     *          data type (example: data type of uint16 will be cast to
     *          uint16 pointer).
     *
     * @return  bStatus_t
     */
    bStatus_t SimpleProfile_GetParameter( uint8 param, void *value )
    {
      bStatus_t ret = SUCCESS;
      switch ( param )
      {
        case SIMPLEPROFILE_CHAR1:
          *((uint8*)value) = simpleProfileChar1;
          break;
    
        case SIMPLEPROFILE_CHAR2:
          *((uint8*)value) = simpleProfileChar2;
          break;
    
        case SIMPLEPROFILE_CHAR3:
          *((uint8*)value) = simpleProfileChar3;
          break;
    
        case SIMPLEPROFILE_CHAR4:
          *((uint8*)value) = simpleProfileChar4;
          break;
    
        case SIMPLEPROFILE_CHAR5:
          VOID memcpy( value, simpleProfileChar5, SIMPLEPROFILE_CHAR5_LEN );
          break;
    
        default:
          ret = INVALIDPARAMETER;
          break;
      }
    
      return ( ret );
    }
    #endif // USE_GATT_BUILDER
    /*********************************************************************
     * @fn          simpleProfile_ReadAttrCB
     *
     * @brief       Read an attribute.
     *
     * @param       connHandle - connection message was received on
     * @param       pAttr - pointer to attribute
     * @param       pValue - pointer to data to be read
     * @param       pLen - length of data to be read
     * @param       offset - offset of the first octet to be read
     * @param       maxLen - maximum length of data to be read
     * @param       method - type of read message
     *
     * @return      SUCCESS, blePending or Failure
     */
    bStatus_t simpleProfile_ReadAttrCB(uint16_t connHandle,
                                        gattAttribute_t *pAttr,
                                        uint8_t *pValue, uint16_t *pLen,
                                        uint16_t offset, uint16_t maxLen,
                                        uint8_t method)
    {
      bStatus_t status = SUCCESS;
    
      // Make sure it's not a blob operation (no attributes in the profile are long)
      if ( offset > 0 )
      {
        return ( ATT_ERR_ATTR_NOT_LONG );
      }
    
      if ( pAttr->type.len == ATT_BT_UUID_SIZE )
      {
        // 16-bit UUID
        uint16 uuid = BUILD_UINT16( pAttr->type.uuid[0], pAttr->type.uuid[1]);
        switch ( uuid )
        {
          // No need for "GATT_SERVICE_UUID" or "GATT_CLIENT_CHAR_CFG_UUID" cases;
          // gattserverapp handles those reads
    
          // characteristics 1 and 2 have read permissions
          // characteritisc 3 does not have read permissions; therefore it is not
          //   included here
          // characteristic 4 does not have read permissions, but because it
          //   can be sent as a notification, it is included here
          case SIMPLEPROFILE_CHAR1_UUID:
          case SIMPLEPROFILE_CHAR2_UUID:
          case SIMPLEPROFILE_CHAR4_UUID:
            *pLen = 1;
            pValue[0] = *pAttr->pValue;
            break;
    
          case SIMPLEPROFILE_CHAR5_UUID:
            *pLen = SIMPLEPROFILE_CHAR5_LEN;
            VOID memcpy( pValue, pAttr->pValue, SIMPLEPROFILE_CHAR5_LEN );
            break;
    
          default:
            // Should never get here! (characteristics 3 and 4 do not have read permissions)
            *pLen = 0;
            status = ATT_ERR_ATTR_NOT_FOUND;
            break;
        }
      }
      else
      {
        // 128-bit UUID
        *pLen = 0;
        status = ATT_ERR_INVALID_HANDLE;
      }
    
      return ( status );
    }
    
    /*********************************************************************
     * @fn      simpleProfile_WriteAttrCB
     *
     * @brief   Validate attribute data prior to a write operation
     *
     * @param   connHandle - connection message was received on
     * @param   pAttr - pointer to attribute
     * @param   pValue - pointer to data to be written
     * @param   len - length of data
     * @param   offset - offset of the first octet to be written
     * @param   method - type of write message
     *
     * @return  SUCCESS, blePending or Failure
     */
    bStatus_t simpleProfile_WriteAttrCB(uint16_t connHandle,
                                         gattAttribute_t *pAttr,
                                         uint8_t *pValue, uint16_t len,
                                         uint16_t offset, uint8_t method)
      {
      bStatus_t status = SUCCESS;
      uint8 notifyApp = 0xFF;
    
      if ( pAttr->type.len == ATT_BT_UUID_SIZE )
      {
        // 16-bit UUID
        uint16 uuid = BUILD_UINT16( pAttr->type.uuid[0], pAttr->type.uuid[1]);
        switch ( uuid )
        {
          case SIMPLEPROFILE_CHAR1_UUID:
          case SIMPLEPROFILE_CHAR3_UUID:
    
            //Validate the value
            // Make sure it's not a blob oper
            if ( offset == 0 )
            {
              if ( len != 1 )
              {
                status = ATT_ERR_INVALID_VALUE_SIZE;
              }
            }
            else
            {
              status = ATT_ERR_ATTR_NOT_LONG;
            }
    
            //Write the value
            if ( status == SUCCESS )
            {
              uint8 *pCurValue = (uint8 *)pAttr->pValue;
              *pCurValue = pValue[0];
    
              if( pAttr->pValue == &simpleProfileChar1 )
              {
                notifyApp = SIMPLEPROFILE_CHAR1;
              }
              else
              {
                notifyApp = SIMPLEPROFILE_CHAR3;
              }
            }
    
            break;
    
          case GATT_CLIENT_CHAR_CFG_UUID:
            status = GATTServApp_ProcessCCCWriteReq( connHandle, pAttr, pValue, len,
                                                     offset, GATT_CLIENT_CFG_NOTIFY );
            break;
    
          default:
            // Should never get here! (characteristics 2 and 4 do not have write permissions)
            status = ATT_ERR_ATTR_NOT_FOUND;
            break;
        }
      }
      else
      {
        // 128-bit UUID
        status = ATT_ERR_INVALID_HANDLE;
      }
    
      // If a characteristic value changed then callback function to notify application of change
      if ( (notifyApp != 0xFF ) && simpleProfile_AppCBs && simpleProfile_AppCBs->pfnSimpleProfileChange )
      {
        simpleProfile_AppCBs->pfnSimpleProfileChange( notifyApp );
      }
    
      return ( status );
    }
    
    /*********************************************************************
    *********************************************************************/
    

    Best Regard.

  • Hi,

    To change characteristic 1 to 16-bit you will need to make it an uint8_t array of size 2. Similar to how characteristic 5 enables support for a 40-bit value by using an array of uint8 of size 5 (8 * 5 = 40).

    Best Regards,

    Jan

  • Hi, 
    Is it possible to use an uint16 bit array for transmitting through Bluetooth. I tried to use the uint16 bit array but not able to read the sent value. Is it feasible to send a uint16 of size array. Should I have to change any of the parameter. Or is it constrained to a uint8 of size??
    Best Regards.

  • Hi,

    It may be possible to use uint16, but you will need to break it up into an array of bytes (uint8_t) before sending over the air. It will likely be easier to just keep it as uint8_t the entire time. You could also store the value in a global variable of uint16 and convert it to an array of uint8_t before transmission.

    Best Regards,

    Jan