Broke my MCU Octopus v1.1 and am trying to get the replacement operating

I did some bad wiring and shorted out the fan ports on my MCU Octopus 1.1 running my Vcore3.1. So I installed a new Octopus 1.1, All cables were disconnected, old MCU removed, all jumpers set to original MCU's settings, new MCU mounted, and then all cables but the fans are hooked up. I power on just the rPi and eventually see "mcu 'mcu': Unable to connect on the klipper touchscreen and on the klipper web page. The final line is "Error configuring printer". This makes sense as the MCU is not powered on. I power on the MCU. Wait a while. Click "Restart" and get: "Klipper reports: ERROR" and "mcu 'mcu': Unable to connect" ... "Error configuring printer" If I click Restart I breifly see the following: This is followed by blue screen reporting: "Klipper reports: STARTUP" and "Please retry in a few minutes" until the screen returns to "Klipper reports: ERROR". Inside the KLIPPER LOG I see this as the last few lines: Extruder max_extrude_ratio=0.266081 mcu 'mcu': Starting serial connect mcu 'mcu': Unable to open serial port: [Errno 2] could not open port /dev/btt-octopus-11: [Errno 2] No such file or directory: '/dev/btt-octopus-11' webhooks client 3040103800: New connection webhooks client 3040103800: Client info {'program': 'Moonraker', 'version': 'v0.8.0-39-g6c7dfe5'} I appears that the rPi and MCU/OctopusV1.1 are not talking. I did remove the jumper from the power jumpers to match the original MCU so it is getting power from the 24V source instead of a USB C. I am using the same USB C to USB C cable to connect them togather. I have made no changes to the rPi. I expect that I need to do an initial firmware update to get the MCU out of its factory "as shipped" state. I expect that I need to get USB connecting between the rPi and MMU to go any further. What is the next step in configuring the rPi and MCU to get them communicating?
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9 Replies
blacksmithforlife
Installing RatOS | RatOS
Raspberry Pi Installation
conscious-sapphire
conscious-sapphire17mo ago
I will start reading that document and following it.
In the meantime I was following other threads and tried: ran "dmesg -w" on the rPi. I get the following when I power on the MCU: [ 2817.384521] usb 1-1.2: USB disconnect, device number 3 [ 2906.012880] usb 1-1.2: new full-speed USB device number 5 using xhci_hcd [ 2906.152720] usb 1-1.2: New USB device found, idVendor=0483, idProduct=5740, bcdDevice= 0.00 [ 2906.152744] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 2906.152763] usb 1-1.2: Product: BIGTREE_OCTOPUS CDC in FS Mode [ 2906.152831] usb 1-1.2: Manufacturer: STMicroelectronics [ 2906.152859] usb 1-1.2: SerialNumber: 203631714E53 [ 2906.157965] cdc_acm 1-1.2:1.0: ttyACM0: USB ACM device
blacksmithforlife
You haven't flashed the MCU. Until you do that it's not going to work
conscious-sapphire
conscious-sapphire17mo ago
I was following that document when I got into the current situation. My issue following that was that when I open the link " http://RatOS.local/configure?step=1 " I get a web page with left sidebar and top title bar but nothing appearing in the central panel.
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conscious-sapphire
conscious-sapphire17mo ago
Agree. I setup my original MCU two years ago. I can't find the instructions on how to do this now. Please point me in the right direction. I was hoping that magic would happen and Klipper would reattach and flash it automatically. This did not happen.
blacksmithforlife
You are running a old version of Rat-OS then. Upgrade to version 2.0(reflash your pi) Yes, because it can't
conscious-sapphire
conscious-sapphire17mo ago
I have the working Rat-OS running on the rPi. It reports to be 'RatOS v1.2.4-4-g898b8ae' and claims "UP-TO-DATE". I never notice an update of Rat-OS from V1 to a V2. I assume that there is not an automated upgrade so I will start the adventure of making a new SD card with the newer RatOS V2.
blacksmithforlife
It is a breaking change. You cannot upgrade in place
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