Attached is an application I created in Visual BASIC 2005 Express which allows a Parallax RFID Card Reader connected to a PC to read tag data. This application has a small form which allows you to select and open the COM Port for the RFID Card Reader and enable or disable reading as necessary.
By default the RFID Card Reader is enabled when the COM Port is opened. Optionally you can trigger a System Beep during each read. The RFID Card Reader is disabled for 1.5 seconds after a read. This delay is provided to avoid duplicate reads. The RFID Card Reader is then re-enabled. Once tags are read into the Text Box they can be copied into a database or other application, speeding tag entry.
RFID Card Reader Connections
The RFID Card Reader Serial is connected to the PC using the schematics provided at this link. The specific schematics are the transistor-based and MAX232 based plans (both use the DTR line for /ENABLE control).
Alternatively you can use the RFID Card Reader USB, now available from Parallax. Both function identical using this software. The source code is available as well should you wish to modify or create your own application.
