I am trying to add an Octopi to my Ender 3 V2 but the Pi cannot detect the printer at all. So I try to connect to Windows and same result. The display turns on and is functional, but when checking device manager there is nothing to be found. I am using the 2.0.7 Marlin firmware on the machine and have tried about 6 different USB cables/other ports.
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$\begingroup$ Did you install the CH340/1 device drivers on Windows? Note that not all ports may work, my previous computer only allowed connection over the usb ports at the back. $\endgroup$– 0scar ♦Oct 8, 2020 at 21:47
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$\begingroup$ I just tried all the ports on the back one by one with device manager open and there was no change. I have the CH340 drivers installed, but not the FTDI drivers since device manager doesn't pick it up in the first place. $\endgroup$– recalmOct 9, 2020 at 0:15
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$\begingroup$ What board is it exactly? Uploading the firmware worked fine? $\endgroup$– toweOct 9, 2020 at 8:01
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$\begingroup$ Is the printer switched on? $\endgroup$– Andrew MortonOct 9, 2020 at 12:36
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$\begingroup$ I have the 4.2.2 board, no issues with changing firmwares. I've tried with the power supply on and off, neither make a difference. $\endgroup$– recalmOct 9, 2020 at 17:05
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After trying about 10 USB cables I finally found one that would work with the Ender and Pi. Specifically, it was my Logitech MX Ergo USB cable.