Philipp Klaus
36 lines
3.1 KiB
Markdown
36 lines
3.1 KiB
Markdown
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#### Debug
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If your printer has problems printing the instructions file, it may blink its LED (green or red) depending on the model. This can have many reasons, eg.:
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* The selected label doesn't match.
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* End of paper.
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* Unsupported opcode (some printers require a mode switching opcode, others fail if such an instruction is sent; some do support data compression, others don't)
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To debug this situation and find out which command could be the culprit, connect your printer via USB. (You don't get any status information via network).
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You can use the supplied tool `brother_ql_debug` to send your problematic instructions file to the printer. It will be split into single instructions sent one after the other.
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After every instruction, the printer will be given a chance to send a status response containing error information. Here is an example:
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philipp@lion ~> brother_ql_debug ./720x151_monochrome.bin /dev/usb/lp0
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INFO: CMD preamble FOUND. Instruction: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [...] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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INFO: CMD init FOUND. Instruction: 1B 40
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INFO: CMD status request FOUND. Instruction: 1B 69 53
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INFO: Response from the device: 80 20 42 30 4F 30 00 00 00 00 3E 0A 00 00 15 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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INFO: Interpretation of the response: 'Reply to status request' (phase: Waiting to receive), 'Continuous length tape' 62x0 mm^2, errors: []
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INFO: CMD media/quality FOUND. Instruction: 1B 69 7A CE 0A 3E 00 97 00 00 00 01 00
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INFO: CMD margins FOUND. Instruction: 1B 69 64 23 00
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INFO: CMD raster FOUND. Instruction: 67 00 5A 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 FF FF FF 1F FF FF FF FF FF F0 00 00 00 00 00 0F FF FF 03 FF FF FF FF E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [...] 00 07 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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INFO: Response from the device: 80 20 42 30 4F 30 00 00 00 00 3E 0A 00 00 15 00 00 00 06 01 00 00 00 00 00 00 00 00 00 00 00 00
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INFO: Interpretation of the response: 'Phase change' (phase: Printing state), 'Continuous length tape' 62x0 mm^2, errors: []
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INFO: CMD print FOUND. Instruction: 1A
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TIME 1.60
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INFO: Interpretation of the response: 'Printing completed' (phase: Printing state), 'Continuous length tape' 62x0 mm^2, errors: []
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TIME 1.60
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INFO: Interpretation of the response: 'Phase change' (phase: Waiting to receive), 'Continuous length tape' 62x0 mm^2, errors: []
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Here, a command file was successfully printed. The last response should state the *Waiting to receive* phase.
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If you want to confirm the sending of every single command individually, you can add the `--interactive` argument to the command line call.
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If you're seeing any error there, open a new issue on Github containing the debugging output to get your device supported.
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