Read printer state
Description
Reads the actual state of the printer.
Command
[ESC] ?
Answer
9 ASCII characters representing the printers state in 8 ASCII boolean format.
- '0' ... FALSE
- '1' ... TRUE
The return value is terminated with a "carriage return".
00001[a][b][c][CR]
- [a] ... 1 ASCII-characters coding the state of the backside card sensor
- [b] ... 1 ASCII-characters coding the state if card is in printer
- [c] ... 1 ASCII-characters coding the state of the frontside card sensor