Erkano GX no longer seeing mppts connected via a usb hub

Q&A and troubleshooting
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1

This solution has worked for over 6 months. VictronConnect over bluetooth shows the mppts are fine. Over the last month, the mppts are no longer showing on the Erkano dashboard.
I suspect it is an issue with a firmare update (I’m running 3.41) or the FT4232 Module 4 Channel USB.
I’ve restarted everything.
The syslogs show this:

` [1100405.526985] usb 3-1: new high-speed USB device number 6 using ehci-platform
[1100405.741849] usb 3-1: New USB device found, idVendor=0403, idProduct=6011, bcdDevice= 8.00
[1100405.750320] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[1100405.757734] usb 3-1: Product: Quad RS232-HS
[1100405.762141] usb 3-1: Manufacturer: FTDI
[1100405.767333] ftdi_sio 3-1:1.0: FTDI USB Serial Device converter detected
[1100405.774379] usb 3-1: Detected FT4232H
[1100405.778953] usb 3-1: FTDI USB Serial Device converter now attached to ttyUSB1
[1100405.787067] ftdi_sio 3-1:1.1: FTDI USB Serial Device converter detected
[1100405.794043] usb 3-1: Detected FT4232H
[1100405.798616] usb 3-1: FTDI USB Serial Device converter now attached to ttyUSB2
[1100405.806546] ftdi_sio 3-1:1.2: FTDI USB Serial Device converter detected
[1100405.813631] usb 3-1: Detected FT4232H
[1100405.818206] usb 3-1: FTDI USB Serial Device converter now attached to ttyUSB3
[1100405.826544] ftdi_sio 3-1:1.3: FTDI USB Serial Device converter detected
[1100405.833638] usb 3-1: Detected FT4232H
[1100405.838206] usb 3-1: FTDI USB Serial Device converter now attached to ttyUSB4
[1100406.963946] usb usb3-port1: disabled by hub (EMI?), re-enabling...
[1100406.970468] usb 3-1: USB disconnect, device number 6
[1100406.977026] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now disconnected from ttyUSB1
[1100406.985975] ftdi_sio 3-1:1.0: device disconnected
[1100406.993171] ftdi_sio ttyUSB2: FTDI USB Serial Device converter now disconnected from ttyUSB2
[1100407.002162] ftdi_sio 3-1:1.1: device disconnected
[1100407.008782] ftdi_sio ttyUSB3: FTDI USB Serial Device converter now disconnected from ttyUSB3
[1100407.017790] ftdi_sio 3-1:1.2: device disconnected
[1100407.024919] ftdi_sio ttyUSB4: FTDI USB Serial Device converter now disconnected from ttyUSB4
[1100407.033952] ftdi_sio 3-1:1.3: device disconnected`
2

Did you try to connect the MPPTs directly to the Ekrano without the USB-hub?
Maybe the hub has a problem?

3

I plugged the hub into my mac and saw the 4 serial ports. I connected to then and confirmed they were transmitting the expected data…