Use BlueZ Stack As A Peripheral (Advertiser)

by

With your Bluetooth dongle plugged in, running the following command will tell you the device name and give its state:

$ hciconfig

The output should look something like this:

hci0:    Type: BR/EDR  Bus: USB
     BD Address: 00:01:02:aa:bb:cc  ACL MTU: 1021:8  SCO MTU: 64:1
     DOWN
     RX bytes:1000 acl:0 sco:0 events:47 errors:0
     TX bytes:1072 acl:0 sco:0 commands:47 errors:0

This indicates the device is called hci0 is in a down state. Issue the following command to bring it up:

$ sudo hciconfig hci0 up

Now it should look like:

$ hciconfig
hci0:   Type: BR/EDR  Bus: USB
     BD Address: 00:01:02:aa:bb:cc  ACL MTU: 1021:8  SCO MTU: 64:1
     UP RUNNING
     RX bytes:1000 acl:0 sco:0 events:47 errors:0
     TX bytes:1072 acl:0 sco:0 commands:47 errors:0

Next, execute the following example command to configure the advertising data to be sent. 

$ sudo hcitool -i hci0 cmd 0x08 0x0008 1e 02 01 1a 1a ff 4c 00 02 15 e2 c5 6d b5 df fb 48 d2 b0 60 d0 f5 a7 10 96 e0 00 00 00 00 c5 00 00 00 00 00 00 00 00 00 00 00 00 00

You can change the hex bytes (starting with 1e) to send different byte sequences for your advertisement. One that literally sends the ASCII codes for “HELLO WORLD” would use: 48 45 4c 4c 4f 57 4f 52 4c 44 (EDIT: But you will also have to prefix this message with a valid header, see here.)

Now, use the following command to activate advertising on the dongle, this will start sending “Helo World” packets.

$ sudo hciconfig hci0 leadv 0

EDIT: the above command makes the advertised service connectable. If you don’t want to allow connections, change it to $ sudo hciconfig hci0 leadv 3

You can also disable advertising using the following command:

$ sudo hciconfig hci0 noleadv

More Related Contents:

  1. Bluetooth Low Energy: listening for notifications/indications in linux
  2. BlueZ: How to set up a GATT server from the command line
  3. Is there a way to increase BLE advertisement frequency in BlueZ?
  4. How to declare 2D array in bash
  5. how to install gcc 4.9.2 on RHEL 7.4
  6. How to convert DOS/Windows newline (CRLF) to Unix newline (LF)
  7. What happens if there is no exit system call in an assembly program?
  8. How do I run a program with a different working directory from current, from Linux shell?
  9. How do I view the list of functions a Linux shared library is exporting?
  10. Why are the backslash and semicolon required with the find command’s -exec option?
  11. Shell/Bash shortcut for bulk renaming of files in a folder
  12. Does Linux guarantee the contents of a file is flushed to disc after close()?
  13. How to preserve line breaks when storing command output to a variable?
  14. How to use CMAKE_INSTALL_PREFIX
  15. What’s the difference between .so, .la and .a library files?
  16. Execute a command without keeping it in history [closed]
  17. Piping data to Linux program which expects a TTY (terminal)
  18. Why is RCX not used for passing parameters to system calls, being replaced with R10? [duplicate]
  19. How can I programmatically manage iptables rules on the fly?
  20. Add a newline only if it doesn’t exist
  21. What are the thread limitations when working on Linux compared to processes for network/IO-bound apps?
  22. Need a good hex editor for Linux [closed]
  23. How is the Linux kernel tested?
  24. What is the difference between buffer and cache memory in Linux?
  25. send mail from linux terminal in one line [closed]
  26. multiple websites on nginx & sites-available
  27. DNS caching in Linux [closed]
  28. How to convert hex to ASCII characters in the Linux shell?
  29. How to check if a program is run in Bash on Ubuntu on Windows and not just plain Ubuntu?
  30. Linux capabilities (setcap) seems to disable LD_LIBRARY_PATH

Leave a Comment