Bus Pirate v4 is a universal bus interface that talks to electronics from a computer serial terminal. Get to know a chip without writing code. Eliminates a ton of early prototyping effort with new or unknown chips. Seeed Studio is the official manufacturer and supporter of the Bus Pirate project. Version 4 is the next generation Bus Pirate hardware, but it's not as stable as Bus Pirate v3.
If you're just starting out with the Bus Pirate we still recommend v3 - it's cheaper, more reliable, and has all the same major features. See a Bus Pirate v4 vs v3 comparison. Protocols 1-Wire, I2C, SPI, JTAG, asynchronous serial (UART), MIDI, PC keyboard, HD44780 LCDs, and generic 2- and 3-wire libraries for custom protocols.
USB interface, USB powered
5volt tolerant pins
0-6volt measurement probe
1Hz-40MHz frequency measurement
1kHz-4MHz pulse-width modulator, frequency generator
On-board multi-voltage pull-up resistors
On-board 3.3volt and 5volt power supplies with software reset
Macros for common operations
Bus traffic sniffers (SPI, I2C)
Transparent USB->serial bridge mode
10Hz-1MHz low-speed logic analyzer
AVR STK500 v2 programmer clone
Scriptable from Perl, Python, etc.
A bootloader for easy USB firmware updates
Open source (CC 0/public domain)
New in Bus Pirate v4
256K program space, 4 times more flash than v3
Integrated, on-board USB (faster)
Data storage EEPROM to store settings
Software pull-up voltage selection: 3.3volt, 5volt, or external supply
2 extra I/O pins
Firmware Upgrade Notification
If you are unsatisfied with the current firmware version, please check with the newly upgrade firmware v6.1.
Each Bus Pirate v4 is tested before it leaves the factory, but please keep in mind that v4 is still experimental, unproven hardware. If in doubt please buy the cheaper Bus Pirate v3, it is still manufactured and actively supported. This hardware is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.
If you encounter any problems when using this product, here is the forum from which you can get the technical support.
An Open Software Ecosystem
We recognize that each project has different requirements and goals. As such we have worked to provide as much flexibility to developers as possible. Our quad-core solution allows us to run numerous software solutions. From the selection of algorithms, NLP services, smart assistants, operating systems, and more, we wish to support our users. If you have suggestions on what services you would like to see us officially support let us know on our forums, or if you enjoy the work yourself, submit a merge request to our github.