Klipper can vs usb. cfg, that will be stored on the host.
Klipper can vs usb Er ermöglicht das Flashen von Klipper über den CAN Bus. cfg is not needed Describe your issue: It’s not a issue… I was using it with an Octopus board, a Mellow Sht 42… And I’m trying to change it for a Bigtreech Ebb42… Connecting them with usb to Rpi, but the Jun 2, 2022 · FYI, I have updated and rebased the work-can2040-20220522 branch to be on top of the “usb to can bridge” work discussed at Experimental "USB to CANbus bridge" mode. As we run default at 500kbits/s each stub length can be up to 1. It is tested to withstand significant bending (it has a bend radius better than most cables), is heat and chemical resistant, and can go in cable chains or freefloat (it is stiff enough to hold up without extra support). Practically, you can safely get away with using only four wires, similar to CANs VCC/GND/H/L, you can have VCC/GND/D+/D- [0] 2. Check Klipper out on discord, discourse, or Klipper3d. As you can see, there would be only one USB port left. Old Printer? Cheap Printer? New Printer? Bad Prints? Great Prints? Klipper can help you and your machine produce beautiful prints at a fraction of the time. Once you've selected that, there will be an extra option to select your can interface. Some boards may also be able to add an /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. The klippy host software is attempting to connect". I have Install Webmin so you can use a second PC to issue commands to Linux, update it and copy paste into the shell from another computer u are comfortable with. 搜索usb id前，请先连接到ssh; 请注意需要确保是使用网络登录到ssh而不是串口登录; 请确保有连接好刷了usb固件的主板，并且确保连接上位机的数据线具有数据传输功能; 搜索设备 The SKRat board has a dedicated CAN port with a built-in CAN transceiver, and with the board serving as a USB-to-CAN bridge to the host device, I can plug my CAN device directly into that CAN port and it becomes available as its own node on the CAN bus which I can then access from the host device, no differently than the first device. So, normally, the number of slots is absolutely sufficient. I asked a Klipper Dev about CAN limitations within Klipper and was informed all serial communication to Klipper is set to 250Kbits/s for all types of serial communication (example: USB, CAN, UART, SPI, I2C Apr 23, 2024 · Bridging devices: Devices such as the Waveshare CAN Hat, CANable, CandleLight ( Fly UTOC and Pi Hat are candleLight devices) and others allow the Klipper Host ( Pi or Pi alternative) to act as a node on the CAN bus. Edited January 31, 2024 by McCosch Jun 19, 2023 · Basic Information: Printer Model: Vcore 3. Es gibt seit einiger Zeit ein sehr interessantes Projekt namens “CanBoot”. I thought I’d reproduce it here for anyone else struggling to get CAN bridge mode up and running. You just need this PCB and a USB C cable. I followed your github/tutorial and everything works perfectly --except if I reboot the RbPi, can0 goes down and doesn't come back up. 2). Canboot is a bootloader which can be used to flash firmware on your CAN or USB toolhead board without changing your wiring! This can greatly simplify maintenance, and is seen by many as a great quality of life improvement. In addition to CAN, Katapult now supports USB and UART interfaces. Jan 26, 2022 · The Beagle USB 480 Power Protocol Analyzer – Standard and Ultimate Editions can non-intrusively monitor High-speed USB 2. With the latest code the rp2040 can now be used as a canbus Klipper client or as a “usb to can” adapter. See full list on klipper3d. What worked for me was flashing raspberry with pi imager, installing kiauh, installing klipper and moonraker (and fluidd in my case), building the firmware, copy it from raspi to my PC with winSCP, put it on SD card with firmware. Klipper creates a “virtual serial port” via the “/tmp/printer” file, and it emulates a classic 3d-printer serial interface via that file. When Klipper uses this mode the micro-controller appears as a "USB CAN bus adapter" under Linux. Dec 3, 2022 · It can run pre trained AI, but also any type of machine-learning workload… And to make it more complicated, we have decided to use a single board computer powered by Rockchip RK3588 running UBUNTU as a better base than RPI 4, that are harder to find than gold! VS code is running perfectly on UBUNTU, but klipper is not yet, a lot to adapt ! Most mcu's will return an id beginning with usb-Klipper after being successfully flashed with Klipper firmware. USB to CAN bus bridge mode¶ Some micro-controllers support selecting "USB to CAN bus bridge" mode during Klipper's "make menuconfig". After FIRMWARE_RESTART or rebooting the Pi, can0 isn't coming back up. It can be obtained with the following commands: # User-ID id -u <your Klipper user here> # Group-ID id -g <your Klipper group here (likely the same as the user)> /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. Klipper has also the posibillity to use the U2C as a USB-to-CAN bus bridge. log Fill out above information and in all cases attach your klippy. We’ve recently expanded the CANbus support in Klipper - in particular to make it easier to support communicating with some “toolhead boards”. itll be interfacing with the ebb and an ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. The RPi Apr 22, 2024 · The decision between Klipper UART vs USB involves careful consideration of your specific requirements, printing environment, and desired performance. The intended way is CAN bus (2-wires twisted pair, 2-wires for +24V & Ground); you will also need a CAN bus interface for the RPi-like CAN hat or U2C (USB to CAN) adapter. May 28, 2023 · The most common Klipper-compatible CAN boards (the BTT EBB36 and EBB42) are both USB/CAN – they can be used as a CAN toolboard, but can also be used directly via USB. Why can't I move the stepper before homing the printer?¶ Apr 27, 2023 · Theoretically, you would indeed need 4 wires for USB + 2 power wires. log file. May 4, 2023 · Basic Information: Printer Model: Ender 3 Pro MCU / Printerboard: SKR mini e3V3 klippy. Masse Im Falle von Kupferleitungen arbeitet der CAN-Bus mit zwei verdrillten Adern, CAN_HIGH (CAN_H) und CAN_LOW (CAN_L) (symmetrische Signalübertragung). And you have less moving parts, because you don't need to go USB->CAN controller->CAN network->toolboard. Using CAN bus via USB is when the can bus communication is sent over USB and is not USB protocol but CAN protocol, to connect this to the CAN bus, you have to place a CAN bus transceiver between that USB and the CAN bus. Klipper also provides a USB to CAN bridge mode that allows boards like the SUper 8 and E3-v2 with built in CAN bus transcievers to Mar 27, 2021 · I’m interested in feedback on experiences with host CANbus devices. 并且将设备与上位机连接好. Pasting your printer. Twisted pair Ethernet cables or specifically made CAN bus cables. Klipper USB Accelerometer A PCB designed to make Klipper's input shaping much easier by simplifying the wiring and config for measuring resonances . I have expensive CANtacts since I purchased these before lower cost USB options existed. USB wird hier also nur für die Leitungen zweckentfremdet. But you will also need to supply +24V & Ground to power the EBB (can not be powered via USB-C) USB-C with the EBB set for Aug 2, 2023 · Außerdem ist die USB Buchse bei den meisten Boards ungünstig angebracht vom Winkel her. Ensure the SELECT jumpers are in the CAN position (green box, blue lines) Connect the board to the PI via USB C. Thanks Tim Do the CAN FD pins always work and the little push button changes the USB port from being USB over to putting the USB-B interface onto the canbus network via the physical switch? What does that little canbus button actually do? Does the little button only control the USB interface or do you have to select CANBUS for the CAN FD pins to work? I'm having a can-USB issue I hope you can help me with. You still have to run 12/24v power to them even if you’re using USB, but its vastly easier and cheaper to find continuous flex USB cables than it is to find affordable A modern 3D printer has many, many wires going from the mainboard to the print head. Für USB findest du nicht viel, weil es für USB nix groß zu machen gibt. 2 Toolboard, Pi4, and have the toolboard connected to mainboard via the RJ11/12 port. 1, V1. For example I can daisy chaind the USB cable first to an external disk drive then to my monitor and the port on the computer sees both video and disk data. Also z. It is recommended not to use too long usb cable. 1 & V2. log Ive been attempting to get Klipper setup on my Ender 3 for a few hours, and for some reason, I cant detect any usb connection even though it worked perfectly fine for Marlin. 注意：请使用普通的上位机，比如树莓派 FLY派等。 /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. The /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. Using Octopus Pro v1. With that said, I have concerns of saturating CAN communication. Dec 2, 2022 · 1) A CAN toolhead board - e. 0, V1. Jun 12, 2022 · I’ve created a new development branch that enables a micro-controller to simultaneously run Klipper and act as a “USB to canbus” adapter. ## give it a name (eg. Klipper can help you and your machine produce beautiful prints at a fraction of the time. CAN support is currently limited to stm32 F-series and rp2040 devices. The USB to CAN bus adaptors have this type of connection (BTT U2C V1. For example: a lot of Creality boards have an external (to the mcu chip) USB controller that sits between the MCU and the host system. cfg, that will be stored on the host. -Kevin Aug 3, 2024 · I am looking into making a Voron 2. bin name, inserting in the printer and then restart it. The Creality Sonic Pad can either be updated via an existing internet connection using the menu in the pad or offline via a USB interface. org Can anyone tell me, confirm, that the Neptune 4 series (Pro, Max, Plus etc) running Klipper, can run from a PC or Raspberrry Pi (eg Octoprint), via USB and/or Wifi (both hiopefully!) ??? Thanks. 4 and other 3D printers that runs Klipper. io/ ). flashCAN. Es muss also weder ein USB- oder serielles Kabel angeschlossen werden, noch muss ein Jumper gesetzt oder eine SD Karte eingesteckt werden. sh ## now you can run the script by typing the following command in ssh ## ~/klipper/flashCAN. " or "mcu 'Can0': Unable to connect". Using dfu-util, you can load Katapult, then load Klipper /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. The "Klipper bridge mcu" itself will appear as if was on this CAN bus - it can be identified via canbus_query. 2) A CAN bus adapter which can take many forms: A USB -> CAN adaptber (U2C, UCAN, CANtact) - Buy whichever one is available and cheapest. This mode may allow one to use a micro-controller as both a "USB to CAN bus adapter" and as a Klipper node. py and configured like other CAN bus Klipper nodes. Connect just the two power wires of the 4 pin can plug on the ebb to supply 12/24V. 4 with CAN tool changers and CAN stepper motor drivers in order to simplify wiring. A user could guess it, or they could enter the device path of the gs_usb device, however the likely result would be much confusion. a Mellow SB2040, Huvud, EBB42/36 etc. USB-C cable as you would with any MCU with Klipper. Dec 18, 2024 · To mount the USB drives under the correct user that also runs Klipper and Moonraker, one needs the User-ID and Group-ID of this user. May 16, 2023 · The BTT manual states you can configure the firmware in two ways: IF USE USB. i have it up and the raspi/klipper reads it fine but dealing with other build issues, so havent had a full test yet. It is literally made for the application. Aug 7, 2023 · We can then use the Klipper firmware on the primary mcu (SKR-Pico) with the USB to CAN bus bridge and the installed Katapult on the toolhead mcu (EBB36), listening on the CAN bus, to load the Klipper firmware for the first time under: Installing the firmware on the EBB36 Install 1st Klipper. Die Druckerboards werden dann mit einer Klipper Firmware kompiliert, wo die CAN Leitungen die gleichen sind wie die USB Leitungen. I use the btt octopus board integrated can interface and checked the usb-can-bridhe checkbox when making the klipper firmware. Jan 31, 2024 · The cable supplied should be connected to the Octobus board, unfortunately I can't find the connector for the CAN-L cable. Update Aug 20, 2023 · I get a klipper blue screen with the message: "Printer is not ready. There are a few exceptions to this though. 1 MCU / Printerboard:octopus peo + ebb42 klippy. im gonna ask around the voron and vzbot discords, they have canbus groups there that pretty much can answer anything. Dec 12, 2023 · The most common Klipper-compatible CAN boards (the BTT EBB36 and EBB42) are both USB/CAN – they can be used as a CAN toolboard, but can also be used directly via USB. Your control boards are slaves, they do what they're told by Klippy. Insert the USB power jumper per the red box below. Feb 7, 2024 · Modern USB can push gigabytes of data per second, it can also silly up to about 200 Watts of power over the USB cable. The 'rpi_usb' method # is useful on Raspberry Pi boards with micro-controllers powered # over USB - it briefly disables power to all USB ports to # accomplish a micro-controller reset. statt CAN port gibst du den seriellen (USB) Port in der config an. 0 (up to 480 Mbps) and offer class-level decoding. d/can0 file and that doesn't help. Each set is responsible for a component and its operation. org with canbus_uuid commented out, so it looks like in this example the board was compiled with USB support instead of can bus support. Note that you need to set your datarate here, and it will need to be the same as the one you use with Über das USB-Kabel werden dann die CAN_RX und CAN_TX Leitungen vom µController übertragen. In the case of the BigTreeTech U2C, this solution has no advantages over the candlelight firmware, since no freely usable pins are available on the board. The 'command' method involves # sending a Klipper command to the micro-controller so that it can # reset itself. go to your klipper directory and run the command: sudo chmod +x flashCAN. Some boards I’m aware of: The CANable USB2CAN board ( https://canable. Also kein SD-Karten jonglieren, keine Jumper stecken, keine Taster drücken. You still have to run 12/24v power to them even if you’re using USB, but its vastly easier and cheaper to find continuous flex USB cables than it is to find affordable Klipper creates a "virtual serial port" via the "/tmp/printer" file, and it emulates a classic 3d-printer serial interface via that file. cfg is not needed Be sure to check our Knowledge Base and in particular this and this post Describe your issue: Hi, Yesterday @Napcal opened my eyes… He explained that the Canboard (Ebb42) has 2 firmwares If you check the two pins below the 2×2 black molex connector you can find that they are CAN L and CAN H meaning: CAN L = Data – CAN H = Data + We are going to cut and split a USB-C cable and only use the 2x data cables (we are not going to use vin and ground cables) We will jump connect those 2x data cables to the usb port like this: /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. Then use Katapult via USB to install Klipper and after the CAN bus will be back up. Currently lpc176x, stm32 and rp2040 MCUs are supported. /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. Aug 21, 2022 · This may often result in the wrong location specified for -d, as it isn't possible to know it until the MCU has entered CanBoot. Klipper), ohne dass man am Druckerboard selber Hand anlegen muss. USB cables are not motion rated Once again, this stems from confusing USB, the cable/connector, and USB, the protocol. org Mar 27, 2022 · So the new release from mellow sparked a discussion about the necessity of CAN Mellow just released a toolhead board (Fly-sht) (and yes…great name) It can be connected to CAN or directly with USB to the rpi The product page stated that CAN is “better” and USB “signal stability is easily disturbed. You can run the USB protocol If you want to use CanBridge, you need to select the "USB to CAN bus bridge (USB On PA11/PA12)" option instead of "CAN Bus on PD0/PD1" option. Updates Offline or Online. It can have multiple end points too. Das Video / diese Anleitung befasst sich nur mit STM32, RP2040 und da auch nur mit USB und CAN /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. If shielding is used it should only be grounded at one point. Feb 16, 2023 · Basic Information: MCU / Printerboard: CAN enabled stm32, same5x, and rp2040 chips Over on the BTT Manta-M8P repo, people have been having a lot of issues getting the MCU into CANBUS bridge mode, so I wrote up the procedure for them to follow. ” With the multi-mcu homing and probing The most reliable option, for most CAN boards, is to not use CAN. 如果Klipper配置了对应ID则需要在系统配置里面先屏蔽ID后关机，断电在开机或者点一下主板的重置; 上位机CAN速率与主板，工具板等是否一致; 可以使用下方代码确定上位机CAN速率; 确定一下是否有断线; 工具板与设备(刷了USB桥接固件的主板或者UTOC)之间是否有安装 CANboot. However, one recurring issue with CANbus support has been identifying good host interfaces. Reading through some of the setup things i've found it sounds like if i update klipper it could be a pain using the direct CAN connection between the mainboard and toolboard, instead of bridge board. B. RPI is Klipper application host (Klippy). Nov 8, 2022 · 3 wires (usb cable and power) Why CAN has no benefits over USB for 3d printers running klipper. 需要使用安装好klipper服务的上位机 通过网络连接SSH. Communication interface = Serial (on USART2 PD6/PD5) however it is unclear to me what the difference is, and why i should choose one over the other. Katapult is licensed under the GNU Set jumpers and connect the MKS Monster8 to the PI via USB. This example is specific to the BigTreeTech Manta Sep 12, 2022 · Basic Information: Printer Model: vcore 3 MCU / Printerboard: Octopus pro klippy. Obtain a Klipper Configuration File¶ Most Klipper settings are determined by a "printer configuration file" printer. Is there a reason people opt for the CAN configuration? Sure a twisted pair is smaller than a USB cable, but you also have to buy a USB-to-CAN adapter which seems like you're adding a second step in the process. 2) Variante 1. By understanding the advantages and disadvantages of each connection method and optimizing your setup accordingly, you can ensure a reliable and efficient communication channel for your 3D The SKR 3 only support USB or CAN-FD and the EBB supports CAN, is this a combination that klipper can cope with? ill be running klipper on a Rpi so will probably get the waveshare CAN hat recomened in the Klipper docs. das Mainboard). Aug 5, 2022 · Setup boards for Klipper Octopus - Setup Klipper for USB to CAN bus bridge, with CAN comms to EBB EBB - Setup Klipper for CAN comms Find serial device for Octopus / Pro on Raspberry Pi Flash Klipper to Octopus / Pro with CanBoot serial command Setup can0 network on Raspberry Pi, power cycle printer Find CAN uuid for Boards a. Why can’t I move the stepper before homing the printer? I didn’t connect the network via the LAN port, but via WLAN. CAN bus is a bus, it must be terminated at each end with 120ohm resistors. It sounds like you can SSH in, so that is a bit of a clue that they do support connection. But then Klipper shuts down and reports either "Lost communication with MCU 'Can0'. Feb 2, 2024 · How? Only if you set Katapult (CanBoot) for USB and not CAN bus since you will use the Klipper USB to CAN bus bridge, and the CAN bus will not be functioning until you get the Klipper firmware up and running. I have allow-hotplug can0 in my interfaces. This is a good solution if you want to use the board as a CANBUS adapter for your printer and an MCU at the same time. In general, alternative software may work with Klipper as long as it can be configured to use "/tmp/printer" for the printer serial port. Nov 5, 2023 · Somit ist Katapult ein sehr universell einsetzbarer Bootloader. This tool provides real-time graphing of VBUS current and voltage values and allows for interactive and bi-directional correlation of current/voltage values with USB data. You can then hold reset (blue box), hold boot0 (labled above the blue box) and release reset followed by boot0 to enter USB转CAN总线桥接模式¶. . 6m long. sh) ## ssh into your system. Connect both the main board and the ebb to that USB hub, the benefit here is that you can use USB C cables which are cheap, and ultra reliable compared to anything you could do yourself. 1). 0 hat einen STM32F072C8T6 Controller. org I have installed skr mini E3 V3 and klipper on my ender5Pro last week and had the same issues. Communication interface = USB (on PA11/PA12) ElSE IF USE USART2. 请确保d5主板烧录的固件是usb桥接can固件配置; 搜索id 搜索usb教程 搜索设备前注意事项 . In that case, this development branch may remove the need for a separate usb to can adapter. Klipper can help you and your machine produce beautiful prints at a fraction of the time. Can someone help me there . 有些微控制器支持在Klipper的“make menuconfig”中选择“USB to CAN bus bridge” 模式。该模式可使微控制器既可用作“USB转CAN总线适配器”并且同时作为Klipper节点。 当Klipper使用此模式时，微控制器在Linux下显示为“USB CAN Bus Adapter”。 In order to achieve a functioning CAN network on your printer you need 3 things: A computer running the main Klipper software (usually a Raspberry Pi, but anything with a USB port will work for this guide), a CAN network adapter (either a standalone USB device or running a compatible mainboard in klipper’s usb-can bridge mode) and a CAN node /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. RPI connects to CAN bus via FYSETC UCAN USB to CAN adapter running candleLight_fw. I chose the moderate can speed 500000 bps, and its enough even for resonance measurements. It will appear alongside other devices that are actually on the CAN bus. So I have three free usbs left on the pi. Igus Chain Flex cable is my go-to. In general, alternative software may work with Klipper as long as it can be configured to use “/tmp/printer” for the printer serial port. This may be useful for users that have a canbus enabled mainboard and are running a canbus based toolhead board. (PD0/PD1). Almost all of them also support USB directly, and you can get a impedence-matched continuous flex USB cord for a few dollars vs 10-20x that much for a certified CAN one. If you ever need to update Katapult on the Octopus or Klipper you will need to double click the reset to get Katapult into loading mode via USB. But what if w When Klipper uses this mode the micro-controller appears as a "USB CAN bus adapter" under Linux. Sep 16, 2024 · Can has been working perfectly since i converted to it a year ago. USB桥接CAN固件烧录 开始编译 . The U2C is a CAN bus bridge device. g. According to various drawings and pictures on the Internet, the place where the CAN-L is marked is the LAN connection for the BIGTREETECH Octopus Pro. 1, EBB42 v1. If you set Katapult for CAN bus with no Klipper firmware (bridge), then there is no CAN bus, so you cannot connect to Katapult. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. Im out of ideas as to what the problem is, I didnt have much knowledge in the first place, and I would greatly appreciate any kind Feb 23, 2023 · No. Feb 25, 2024 · ## ----- HOW TO USE ----- ## save this document and copy to your klipper system into the /klipper directory. CanBoot ist ein alternativer Bootloader für STM32 Controller. du pflegst das Board in Klipper ein, wie jedes andere USB Board (also z. Apr 14, 2023 · One reason and one reason only and that reason is that klipper f**Ked it up big time by trying to be all things to all men, in so doing making it so difficult to get the klipper versions of can-bus up and running it turns many people off can bus altogether, because they think the issues is can-bus when the reality is that it doesn't actually The bootloader itself makes use of Klipper's hardware abstraction layer, stripped down to keep the footprint minimal. Feb 23, 2025 · Hinweise 1) Diese Anleitung beschreibt beide EBB Boards (36 & 42) und das in allen derzeit verfügbaren Varianten (V1. There are four secondary MCUs (EBB42 running Klipper MCU firmware) hanging off CAN bus and they respond as expected (UUIDs, application Klipper) when using Klipper query script referencing only the CAN network interface (can0) without use of a serial device on the /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. sh Klipper can help you and your machine produce beautiful prints at a fraction of the time. A working instance of Klipper, Moonraker and / or Mainsail/Fluidd; Access to the Raspberry PI terminal (via SSH or physical keyboard/mouse/display) A CAN adapter (USB or SPI) Waveshare RS485 (Serial) MKB Canable / Canable Pro (USB) UTOC-1/3; Other… (some things may vary) A CAN toolhead board Huvud; EBB36/42; SHT36/42; TurboCAN; SB CAN /r/klippers -- a place to discuss all things related to the Klipper 3d Printer Firmware. between that and the Klipper web GUI running you will never even need to touch it so you can grab a 7" touch LCD and dedicate it to the LCD you likely lost on your printer when converting it. Klippy (the klipper brain that runs on your raspberry pi) is in charge of everything going on in your 3d printer. Mar 16, 2024 · This is because when you update Katapult to CAN com, there will be no CAN bus because it wiped out Klipper. An appropriate configuration file can often be found by looking in the Klipper config directory for a file starting with a "printer-" prefix that corresponds to the target printer. CAN_GND (Masse) als dritte Ader ist optional, jedoch oft zusammen mit einer vierten Ader zur 5-V-Stromversorgung vorhanden. This is not an official Klipper support channel and poorly moderated so ymmv. It's the master. reddits not really the best place for any kind of klipper support anyway, so might be best to get on the discord groups. About this item 【High Performance MCU】BTT MMB CAN is a control board to for Voron Enraged Rabbit Carrot Feeder System, which provides a perfect solution for multi-filament feeding to Voron 2. Er ermöglicht ein Firmware Update (wie z. At this point you now should have a working system. I thought maybe I had Can Hi and Can Lo reversed or maybe a bad cable (or bad crimp job by yours truly). xyiqktyhcqlcrparnbgcmgtxddelsuqbnvhldvmusuphjyxcxjtiujqvllkqmmvwdsvnvyopmwdvpoxv