Communication Between the Cordless System and the Host

The cordless scanner provides immediate feedback in the form of a “good read” indication (a green LED on the scanner and an audible beep) after a bar code is scanned correctly and the base has acknowledged receiving the data. This is possible since the cordless system provides two-way communication between the scanner and the base.

When data is scanned, the data is sent to the host system via the base unit. Confirmation from the host system or the base indicates that the data sent was received by the host. The cordless scanner recognizes data acknowledgement (ACK) from the base unit. If it cannot be determined that the data has been properly sent to the base, the scanner issues an error indication. You must then check to see if the scanned data was received by the host system.

1) Good Read

3)Base sends data to host

2) ACK from base

Connecting the Base When Powered by Host (Keyboard Wedge)

A base can be connected between the keyboard and PC as a “keyboard wedge,” plugged into the serial port, or connected to a portable data terminal in wand emulation or non decoded output mode. The following is an example of a keyboard wedge connection:

1. Turn off power to the terminal/computer.