2015-12-27 15:56:51 +00:00
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********
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Printers
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********
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.. note:: **TODO** Merge this page into the API-description.
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There 3 different type of printers:
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USB(idVendor, idProduct, interface, in\_ep, out\_ep)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Based on pyusb and libusb-1.0
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* ``idVendor`` is the Vendor ID
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* ``idProduct`` is the Product ID
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* ``interface`` is the USB device interface (default = 0)
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* ``in_ep`` is the input end point (default = 0x82)
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* ``out_ep`` is the output end point (default = 0x01)
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Serial("devfile", baudrate, bytesize, timeout)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Based on pyserial, default values are based on the defaults set by
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DIP\_SWITCH\_1 on the documentation(hardware side).
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* ``devfile`` is an alphanumeric device file name under /dev filesystem (default = /ev/ttyS0)
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* ``baudrate`` is the Baud rate for serial transmission (default = 9600)
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* ``bytesize`` sets the serial buffer size (default = 8)
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* ``timeout`` defines Read/Write timeout (default = 1)
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Network("host", port)
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^^^^^^^^^^^^^^^^^^^^^
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Based on socket
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* ``host`` is an alphanumeric host name, could be either DNS host name or IP address.
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* ``port`` to write to (default = 9100)
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2016-07-15 11:15:22 +00:00
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Troubleshooting:
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Problems with a network-attached printer can have numerous causes. Make sure that your device has a proper IP address.
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Often you can check the IP address by triggering the self-test of the device. As a next step try to send text
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manually to the device. You could use for example:
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::
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echo "OK\n" | nc IPADDRESS 9100
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# the port number is often 9100
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As a last resort try to reset the interface of the printer. This should be described in its manual.
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2015-12-27 15:56:51 +00:00
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File("file\_name")
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^^^^^^^^^^^^^^^^^^
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Printcap printers
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* ``file_name`` is the full path to the device file name
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