The Wiring USBAdapter board was designed to convert a USB connection type with the WiringMini or in general with any microcontroller with RS-232 TTL level RX/TX serial lines for both program the microcontroller or just communicate it with a computer USB port.

The Wiring USBAdapter board can also provide 5 or 3.3 volts VCC regulated power (to power a WiringMini or other components in your projects). The USB adapter is powered from the USB bus ONLY.

What's needed? The brand new Wiring USBAdapter board and a Wiring USBAdapter chip and a generic USB printer cable to connect to the board to a computer.

Plug the USBAdapter board to the USB cable and to the computer, make sure to follow the software setup process accordingly. Different setup examples for connecting the USBAdapter to Wiring and WiringMini boards are shown below.

USBAdapter powering a WiringMini (5 Volts): Note how the +5V from the USBAdapter goes directly into the VCC line of the WiringMini board. Ground (common) goes to Ground. Also note the Tx and Rx lines are connected to Serial serial port Rx and Tx lines of the WiringMini board respectively.

Note: Remember the port used to upload programs into the Wiring hardware is called Serial and it is available on pins 32 and 33. The second hardware serial port is available on pins 2 and 3 and it is called Serial1. Serial1 can be used to connect additional serial devices or even a second Wiring USBAdapter if needed.

USBAdapter without powering the WiringMini: In this case the VIN line in the WiringMini is connected to the positive V+ line of the external power adapter, this can be done because the WiringMini board has a power regulator included capable of converting higher voltages into regulated 5Volts (VCC). The external power supply ground line is connected to the WiringMini GND line. Note how the GROUND line from the USBAdapter also goes directly into the GND line of the WiringMini board. The Tx and Rx lines are connected to Serial serial port Rx and Tx lines of the WiringMini board respectively.

WARNING, NEVER CONNECT AN EXTERNAL POWER SUPPLY OR BATTERIES WITH VOLTAGES HIGHER THAN 5 Volts DIRECTLY TO the WiringMini VCC, use VIN instead. Doing this wrongly might damage your board permanently. If you are not sure about your connections or need additional support go to the discourse section and ask for help.

Using two USBAdapter boards with the WiringMini (one on each serial port): In this case one Wiring USBAdapter is used on Serial and the second in Serial1 serial ports. The WiringMini board is being powered from an external power source. The ground signal is shared by all the devices.

USBAdapter connected to the Wiring I/O board Serial1 serial port: In this case one Wiring USBAdapter is used on Serial1 with the Wiring /O board.