Port

Connect your W2 via a W2 Data Cable to your computer.

Serial Port

Choose the Computer's serial port that is connected to the W2. Click the arrow to open a list of available ports, then select the port you have connected to the W2. See Finding the appropriate serial port for a USB to Serial Adapter if you're using a USB to Serial Adapter and are not sure which port to choose.

Refresh Port List

Click to update the list of available serial ports, which may be helpful if you plug in a USB to Serial Adapter after the program has started.

Test Communications

Reopens the serial port and verifies that the W2 Utility can communicate with the W2.

Null modem cables, and defective serial cables can echo whatever is sent to them. The W2 Utility cannot tell what device is attached without sending a block of firmware. If firmware load fails on the first block (address x800), it is very likely that the communications cable is not correctly attached to the W2, the cable is defective, or the wrong serial port has been chosen.