What is the difference between a start/stop bit and a prefix/delimiter?
The start and stop bits are extra characters that appear at the beginning and end of the code. Every code has a start and stop bit. You can program the reader to transmit those characters or not to transmit them. Whereas, the prefix or delimiter is a single character that will appear before the start bit and after the stop bit respectively. The reader can be programmed to send a specific prefix or delimiter character. Q: When I program the LEDs in the reader I get the message Command Acknowledged yet the reader is not operating according to the programming commands. A: While in SA/STA or DC mode the LED on the reader operate according to the defaults set by the manufacture and cannot be reprogrammed to operate in a certain way after a good read. However, a J reader or a reader operating in J mode can have its LEDs operation reprogrammed.
