SWRA772 august   2023 CC2564C

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Running the Bluetooth Code
  6. 3 Demo Application
    1. 3.1 Device 1 (Server) Setup on the Demo Application
    2. 3.2 Device 2 (Client) Setup on the Demo Application
    3. 3.3 Initiating Connection from Device 2
    4. 3.4 Identify Supported Services
    5. 3.5 Data Transfer Between Client and Server
    6. 3.6 Multiple SPPLE Connections Guide
  7. 4 Demonstrating SPP LE on an iOS Device with the LightBlue App
    1. 4.1 LightBlue Overview
    2. 4.2 SPP LE Service Overview
      1. 4.2.1 Characteristics
  8. 5 LightBlue as the Client/SPPLEDemo as the Server
    1. 5.1 Connecting the Devices
    2. 5.2 Enabling Notifications
    3. 5.3 Sending Data from LightBlue/Receiving Data in SPPLEDemo
    4. 5.4 Sending Data from SPPLEDemo/Receiving Data in LightBlue
  9. 6 LightBlue as the Server/SPPLEDemo as the Client
    1. 6.1 Connecting the Devices
    2. 6.2 Sending Data from LightBlue/Receiving Data in SPPLEDemo
    3. 6.3 Sending Data from SPPLEDemo/Receiving Data in LightBlue
  10. 7 Application Commands
  11. 8 General Commands
    1. 8.1 Help (DisplayHelp)
    2. 8.2 Get Local Address
    3. 8.3 Set Baud Rate
    4. 8.4 Quit
  12. 9 BR/EDR Commands
  13. 10GAPLE Commands
    1. 10.1  Set Discoverability Mode
    2. 10.2  Set Connectability Mode
    3. 10.3  Set Pairability Mode
    4. 10.4  Change Pairing Parameters
    5. 10.5  Advertise LE
    6. 10.6  Start Scanning
    7. 10.7  Stop Scanning
    8. 10.8  Connect LE
    9. 10.9  Disconnect LE
    10. 10.10 Pair LE
    11. 10.11 LE Pass Key Response
    12. 10.12 LE Query Encryption
    13. 10.13 Set Passkey
    14. 10.14 Discover GAPS
    15. 10.15 Get Local Name
    16. 10.16 Set Local Name
    17. 10.17 Get Remote Name
    18. 10.18 LE User Confirmation Response
    19. 10.19 Enable SC Only
    20. 10.20 Regenerate P256 Local Keys
    21. 10.21 SC Generate OOB Local Params
    22. 10.22 Set Local Appearance
    23. 10.23 Get Local Appearance
  14. 11SPPLE Commands
    1. 11.1 Discover SPPLE
    2. 11.2 Register SPPLE
    3. 11.3 LE Send
    4. 11.4 Configure SPPLE
    5. 11.5 LE Read
    6. 11.6 Loopback
    7. 11.7 Display Raw Mode Data
    8. 11.8 Automatic Read Mode
  15. 12References
  16. 13Revision History

6.2 Sending Data from LightBlue/Receiving Data in SPPLEDemo

To confirm that SPPLEDemo has provided LightBlue with the transmit credits after the ConfigureSPPLE has finished running, open the open the SPPLEDemo Virtual Peripheral and choose the Credits Characteristic (0xBA04C4B2-892B-43BE-B69C-5D13F2195392). As mentioned above, LightBlue does not show updated values of characteristics when these are written and the user has no way to confirm that LightBlue received the data. Even though there is no confirmation that LightBlue has received transmit credits, data can still be sent from LightBlue to SPPLEDemo because LightBlue is primarily only a GATT Profile demonstration and doesn't have any knowledge of the SPP LE protocol used. LightBlue is unaware of the transmit credits present, and, for this reason, data can be sent from LightBlue to SPPLEDemo with or without transmit credits. To send data to SPPLEDemo, use the Tx Characteristic (0x0734594A-A8E7-4B1A-A6B1-CD5243059A57') and do the following in LightBlue:

  1. Open the Tx Characteristic and choose the No value/hex option.
  2. Type in 414243.
  3. Choose Done.

In SPPLEDemo observe a data indication. To read the data use theLERead 5c75524c733a command. Observe the ABC displayed in the terminal, as seen below:

Data Indication Event, Connection ID 1, Received 3 bytes.
SPP+LE>LERead 5c75524c733a
Read: 3.
ABC