payload: {"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/15993","repository_url":"https://api.github.com/repos/MarlinFirmware/Marlin","labels_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/15993/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/15993/comments","events_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/15993/events","html_url":"https://github.com/MarlinFirmware/Marlin/issues/15993","id":527728767,"node_id":"MDU6SXNzdWU1Mjc3Mjg3Njc=","number":15993,"title":"[BUG] OctoPrint disconnects when doing PID Autotune on SKR Mini E3 v1.2","user":{"login":"ViolenceUndone","id":2836390,"node_id":"MDQ6VXNlcjI4MzYzOTA=","avatar_url":"https://avatars1.githubusercontent.com/u/2836390?v=4","gravatar_id":"","url":"https://api.github.com/users/ViolenceUndone","html_url":"https://github.com/ViolenceUndone","followers_url":"https://api.github.com/users/ViolenceUndone/followers","following_url":"https://api.github.com/users/ViolenceUndone/following{/other_user}","gists_url":"https://api.github.com/users/ViolenceUndone/gists{/gist_id}","starred_url":"https://api.github.com/users/ViolenceUndone/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ViolenceUndone/subscriptions","organizations_url":"https://api.github.com/users/ViolenceUndone/orgs","repos_url":"https://api.github.com/users/ViolenceUndone/repos","events_url":"https://api.github.com/users/ViolenceUndone/events{/privacy}","received_events_url":"https://api.github.com/users/ViolenceUndone/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":16,"created_at":"2019-11-24T17:20:33Z","updated_at":"2019-12-01T22:24:30Z","closed_at":"2019-12-01T22:24:30Z","author_association":"NONE","body":"### Description\r\nOctoPrint disconnects when doing PID Autotune on SKR Mini E3 v1.2\r\n\r\n### Steps to Reproduce\r\n1. Checkout bugfix-2.0.x at commit b11551c from Nov 24 2019\r\n\r\n2. Copy configuration.h and configuration_adv.h from `Marlin\\config\\examples\\BigTreeTech\\SKR Mini E3 1.2` (configs and platformio.ini are attached)\r\n    - Note: The only change I made was to change the thermistor type because I have a Titan Aero.  E-steps are wrong as a result but I wanted to make minimal changes to test a totally vanilla build and didn't plan on actually trying to print or move any motors with this build\r\n3. Modify in platformio.ini: `default_envs = STM32F103RC_bigtree_512K` or `default_envs = STM32F103RC_bigtree`\r\n4. Build and install on machine\r\n5. Connect OctoPrint and run `M303 E0 S205 C10` from the Terminal window\r\n\r\n**Expected behavior:** Normal PID autotune process with successful USB connection\r\n\r\n**Actual behavior:** Error in OctoPrint terminal after 10-15 seconds:\r\n```\r\nUnexpected error while reading serial port, please consult octoprint.log for details: SerialException: 'device reports readiness to read but returned no data (device disconnected or multiple access on port?)' @ comm.py:_readline:2793\r\n```\r\n\r\n#### Additional Information\r\n- USB cable has 5V wire snipped so there's no 5V power going to the board from the Pi.  Others had issues with this in the past.\r\n- I've tried this before and after updating all PlatformIO libraries to their latest versions.  PlatformIO is on Core 4.1.0 and also tried reverting that back to 4.0.3, again with and without latest library versions.\r\n- I have gone through the OctoPrint FAQ article that they link to and none of the points they list apply here: https://community.octoprint.org/t/octoprint-randomly-loses-connection-to-the-printer-with-a-serialexception/228\r\n- OctoPrint previously worked just fine in the exact same configuration with the stock Ender 3 board running Marlin 1.1.9 and the same USB cable, so the cable and Pi should not be an issue\r\n- Tried unplugging webcam and no change\r\n- First reported over in the BTT repo bigtreetech/BIGTREETECH-SKR-mini-E3#119\r\n- This is likely not isolated to just doing a PID Autotune but I do not want to attempt to print without doing the tune first so I cannot verify that"},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/comments/560167332","html_url":"https://github.com/MarlinFirmware/Marlin/issues/15993#issuecomment-560167332","issue_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/15993","id":560167332,"node_id":"MDEyOklzc3VlQ29tbWVudDU2MDE2NzMzMg==","user":{"login":"boelle","id":3832239,"node_id":"MDQ6VXNlcjM4MzIyMzk=","avatar_url":"https://avatars0.githubusercontent.com/u/3832239?v=4","gravatar_id":"","url":"https://api.github.com/users/boelle","html_url":"https://github.com/boelle","followers_url":"https://api.github.com/users/boelle/followers","following_url":"https://api.github.com/users/boelle/following{/other_user}","gists_url":"https://api.github.com/users/boelle/gists{/gist_id}","starred_url":"https://api.github.com/users/boelle/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/boelle/subscriptions","organizations_url":"https://api.github.com/users/boelle/orgs","repos_url":"https://api.github.com/users/boelle/repos","events_url":"https://api.github.com/users/boelle/events{/privacy}","received_events_url":"https://api.github.com/users/boelle/received_events","type":"User","site_admin":false},"created_at":"2019-12-01T22:24:30Z","updated_at":"2019-12-01T22:24:30Z","author_association":"CONTRIBUTOR","body":"will close then, we can always reopen if needed"}}
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