BTChat

btchat - primitive chat implemented over bluetooth l2cap

Build

• Requires Bluez dev libs: libbluetooth-dev
• cd btchat && make

Setup

• bluetoothctl is the preferred configuration tool
• Machines must both be discoverable to connect
  • [bluetooth]# discoverable on
• Client must have discovered server to connect

  • [bluetooth]# scan on
       ...
       [NEW] Device xx:xx:xx:xx:xx:xx Machine-A
       ...
       scan off
    

• Trusting on both devices makes connection process smoother
  • [bluetooth]# trust xx:xx:xx:xx:xx:xx

Usage

btchat [-c bdaddr] [-l] [-h handle] [-p psm]
    -c bdaddr  Connect to bdaddr (format: xx:xx:xx:xx:xx:xx)
    -l         Listen for connections
    -h handle  Set user handle
    -p psm     Set PSM in hex

1. Start a listening btchat process on Machine-A with: btchat -l [options]
   • Uses first available hci device on Machine-A
   • Machine-A will print the bdaddr it is listening on
2. Connect to Machine-A from Machine-B with btchat -c [bdaddr] [options]
3. Type something and hit enter
4. ctrl + cto close