Quick Setup

Connect Bus Pirate 5

Connect the Bus Pirate to your computer with a USB C cable.

Bus Pirate 5 currently appears as three USB devices:

• USB CDC class device 0: an emulated serial port for accessing the user terminal
• USB CDC class device 1: an emulated serial port for accessing the binary scripting interface
• USB Mass Storage Device: a disk drive interface for accessing onboard storage

These are common device classes and recent operating systems will not request or require a driver. We're living in the future, woohoo!

Find the serial port

tip

Your terminal emulation software will probably detect and list all the available serial ports connected to your computer. If there's more than one serial port, you can connect to each and press enter until you find the Bus Pirate terminal. You can probably skip this step, but if you need to find the port manually follow the instructions below.

Windows

• Press the Windows key or open the start menu
• Type Device Manager
• Click on the Device Manager to open it
• In the Device Manager look for Ports (COM & LPT), expand it
• In the example Bus Pirate 5 is connected as COM3

Linux

Help document the Bus Pirate, post your instructions in the forum and we'll add them to the docs.

macOS

The easiest way to find the serial ports is probably with a terminal (see the next section). From a terminal, run:

ls -lh /dev/*usb*

You should see four "usbmodem" devices.

  crw-rw-rw-  1 root  wheel  0x9000007 May  9 18:59 /dev/cu.usbmodem1234567890121
  crw-rw-rw-  1 root  wheel  0x9000009 May  9 18:59 /dev/cu.usbmodem1234567890123
  crw-rw-rw-  1 root  wheel  0x9000006 May  9 18:59 /dev/tty.usbmodem1234567890121
  crw-rw-rw-  1 root  wheel  0x9000008 May  9 18:59 /dev/tty.usbmodem1234567890123

The ones that start with cu and the ones that start with tty are identical. The tty version grants you exclusive access, while the cu ones allow multiple processes to access the serial port at once.

In this example, you want to use /dev/cu.usbmodem1234567890121. The other /dev/cu, which ends in 3, is for the binary interface.

Another way to find information about the Bus Pirate on a Mac is:

• Click on Apple Menu->About This Mac
• Click the "More Info..." button
• Scroll Down and click "More Information"
• Click USB on the sidebar_label

The serial number shown will match the name of the device in /dev/.

Android

Help document the Bus Pirate, post your instructions in the forum and we'll add them to the docs.

Fire up a terminal emulator

A terminal emulator is software that connects to the Bus Pirate serial interface and displays the command line. Bus Pirate 5 supports VT100 for a colorful interface with a live view statusbar. A fallback monochrome ASCII mode is also available. Most terminal emulators support VT100, it's been around since the 1970s.

Windows

• We're huge fans of Tera Term on Windows. Download and install the latest version.
• Open Tera Term and select Setup then Serial port.
• Choose the Bus Pirate port, and configure it for 115200 (speed), 8 bit (data), None (parity), and 1 bit (stop bits). Click New setting or New Open to open the port.

• Now select Setup then Terminal.
• Configure as shown above. Terminal size 80x24, New-line both set to CR, Terminal ID set to VT100. Click OK.
• To save the settings for next time, choose Setup then Save Settings.

tip

Seeing duplicate characters when you type? Check that local echo is unchecked in this menu.

• Press Enter in the terminal.
• The Bus Pirate will prompt you to choose VT100 color mode or the fallback ASCII monochrome mode.
• We recommend you type y followed by the enter key.

You should see something like this. Congratulations, you're talking to the Bus Pirate!

Linux

Help document the Bus Pirate, post your instructions in the forum and we'll add them to the docs.

macOS

Macs come with a terminal emulator called Terminal.

Many Mac users prefer to install iTerm2 and use it instead of Terminal.

Unlike on Windows, a terminal emulator on a Mac doesn't typically give you an option to connect to a serial port. Instead it gives you a shell, and you can run a command from the shell to connect to the serial port.

The default shell on Macs is zsh. If your prompt ends with a % sign, you're using zsh. If it ends with a $, you're likely using bash, which was the default on older Macs.

There are two commands that come preinstalled that you can use to connect to the serial port:

• cu

• GNU Screen

  A third popular option is to use Homebrew to install Minicom.

Neither Terminal nor GNU Screen support full color mode, so the text will be gray when you first connect. After connecting, you can switch BP to ANSI-256 color, which is located under "Configuration options" c, "ANSI color mode" 2. Once you do that, it will look more like the screenshots in this documentation.

Of the options presented here, only iTerm2 + cu supports full color mode at the moment, although support is being added to Screen.

cu

Cu writes lock files to /var/spool/uucp, so you'll need to make that directory writable.

% sudo chmod o+w /var/spool/uucp

Connect to the serial port:

% cu -l /dev/cu.usbmodem1234567890121

cu uses the ~ key as an escape character, such like ssh. To exit cu, type ~.. The ~ is only recongized at the start of a line, so you'll likely need to hit Enter first.

GNU Screen

Connect to the serial port like this:

screen /dev/cu.usbmodem1234567890121

Screen uses Control-A as its meta key. Use ^a ^\ to exit. ^a ? for help.

Connecting to serial ports isn't its primary purpose.. Screen is a terminal multiplier. You can "detach" with ^a d, and it keeps running. screen -r reconnects. ^a c opens another terminal inside of screen. There are commands to switch between these "windows", to split them, even to let multiple users control the same terminal at once.

It has many more features beyond the scope of this documentation.

Minicom

Unlike the others, minicom does not come preintalled. If you have Homebrew installed, you can install it with brew install minicom.

You can connect with minicom with minicom -D /dev/cu.usbmodem1234567890121.

The "meta" key for minicom defaults to Escape. To exit, hold Esc and press q. Esc+z for help.

Android

Help document the Bus Pirate, post your instructions in the forum and we'll add them to the docs.

caution

If you see lots of extra garbage characters in the terminal that is probably the VT100 code that updates the live view statusbar. Verify that your terminal supports VT100 mode and that VT100 mode is enabled.