description
Causes the characters n1 and n2 to be echoed back to the host. As soon as n1 is received by the printer, the printer, in turn, will transmit n1 back to the host. Your program should wait to receive n1 before outputting n2. If you don’t wait, you may lose n1. If n1 and n2 are received successfully by the host, you can be reasonably assured that there is a LabelWriter printer attached connected and your program can communicate with the printer.
expression
| ASCII | ESC W n1 n2 |
| Decimal | 27 87 n1 n2 |
| Hex | 1B 57 n1 n2 |
parameters
| n1 | first character to echo |
| n2 | second character to echo |