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Revision to Connecting an LCD control panel

Tony

== Connecting a PanelDue ==
 
=== PanelDue version 2.0 or 3.0, and Duet WiFi2 (WiFi/Ethernet) revision 1.01 or later or Duet Ethernet ===
=== PanelDue version 2.0 or 3.0, and Duet WiFi2 (WiFi/Ethernet) revision 1.01 or later or Duet Ethernet ===
 
==== Option 1: Ribbon cable ====
In tests using standard 28awg 1.27mm spaced ribbon cable, 400mm worked reliably but 800mm did not. So 400mm is the maximum recommended cable length. You can also get 26awg 1.27mm ribbon cable, and by using such cable you may be able to achieve reliable operation with cables longer than 400mm.
 
Caution: if you are using a thermocouple and/or PT100 daughter board, the use of long ribbon cables between the Duet and PanelDue may affect communication between the Duet and the daughter boards, because the ribbon cable connection to the SD card on PanelDue uses the same SPI bus as the daughter boards.
Caution: if you are using a thermocouple and/or PT100 daughter board, the use of long ribbon cables between the Duet and PanelDue may affect communication between the Duet and the daughter boards, because the ribbon cable connection to the SD card on PanelDue uses the same SPI bus as the daughter boards.
 
==== Option 2: 4-way cable ====
The length of the 4-way cable is not critical, however the resistance per conductor should not exceed 0.1 ohm. The SD card socket on the TFT panel will not be functional. The cables supplied by Escher3D and Duet3D are about 800mm long.
 
=== Older PanelDue versions 1.0,1.1. or 2.0 and/or Duet WiFi revision 1.0 or Duet 0.8.5 ===
=== Older PanelDue versions 1.0,1.1. or 2.0 and/or Duet WiFi revision 1.0 or Duet 0.8.5 ===
 
Use the 4-way cable as described above. If you are using PanelDue 2.0 or 3.0 with Duet WiFi 1.02 (WiFi/Ethernet) then you can optionally connect the ribbon cable as well in order to use the SD card socket on the TFT panel.
Use the 4-way cable as described above. If you are using PanelDue 2.0 or 3.0 with Duet WiFi 1.02 (WiFi/Ethernet) then you can optionally connect the ribbon cable as well in order to use the SD card socket on the TFT panel.
 
=== Duet 0.6 ===
'''This information also applies to a stand alone SD or micro SD card socket'''
 
You can use the external SD card socket on the LCD panel if you have used a ribbon cable as described above. Please note, the SPI interface provided by this SD card socket is much slower than the on-board SD card socket built into the Duet. Therefore we recommend that you do not upload files to this card over the network. Use the external SD card socket only if you want to write files to the SD card on a PC and then move the SD card to your printer.
You can use the external SD card socket on the LCD panel if you have used a ribbon cable as described above. Please note, the SPI interface provided by this SD card socket is much slower than the on-board SD card socket built into the Duet. Therefore we recommend that you do not upload files to this card over the network. Use the external SD card socket only if you want to write files to the SD card on a PC and then move the SD card to your printer.
 
To access the second SD card socket, you will need these firmware versions:

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