{"action":"opened","issue":{"url":"https://api.github.com/repos/arduino/ArduinoCore-samd/issues/381","repository_url":"https://api.github.com/repos/arduino/ArduinoCore-samd","labels_url":"https://api.github.com/repos/arduino/ArduinoCore-samd/issues/381/labels{/name}","comments_url":"https://api.github.com/repos/arduino/ArduinoCore-samd/issues/381/comments","events_url":"https://api.github.com/repos/arduino/ArduinoCore-samd/issues/381/events","html_url":"https://github.com/arduino/ArduinoCore-samd/issues/381","id":396018502,"node_id":"MDU6SXNzdWUzOTYwMTg1MDI=","number":381,"title":"Arduino bootloader for SAMD21J18","user":{"login":"DasExperimentator","id":8446457,"node_id":"MDQ6VXNlcjg0NDY0NTc=","avatar_url":"https://avatars3.githubusercontent.com/u/8446457?v=4","gravatar_id":"","url":"https://api.github.com/users/DasExperimentator","html_url":"https://github.com/DasExperimentator","followers_url":"https://api.github.com/users/DasExperimentator/followers","following_url":"https://api.github.com/users/DasExperimentator/following{/other_user}","gists_url":"https://api.github.com/users/DasExperimentator/gists{/gist_id}","starred_url":"https://api.github.com/users/DasExperimentator/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DasExperimentator/subscriptions","organizations_url":"https://api.github.com/users/DasExperimentator/orgs","repos_url":"https://api.github.com/users/DasExperimentator/repos","events_url":"https://api.github.com/users/DasExperimentator/events{/privacy}","received_events_url":"https://api.github.com/users/DasExperimentator/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2019-01-04T18:13:53Z","updated_at":"2019-01-04T18:13:53Z","closed_at":null,"author_association":"NONE","body":"Trying to compile Arduino bootloader\r\nhttps://github.com/arduino/ArduinoCore-samd/tree/master/bootloaders/zero\r\nfor use with a SAMD21J18.\r\nThe bootloader \"as is\" works fine with SAMD21G18. But when flashed to J18, the board only works in Programming mode, but is not detected in Native USB mode once a sketch is uploaded. In fact, after I load the sketch, the board simply disappears from Device Manager (not even an Unknown Device)...\r\n\r\nI saw a few comments on the Net stating building the bootloader for J18 is \"straight forward\" and needs almost no modifications. Now, I must be doing something wrong... Can someone share his experience or maybe point me to a relevant guide?"}}
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