{"action":"created","issue":{"url":"https://api.github.com/repos/arduino/Arduino/issues/3719","labels_url":"https://api.github.com/repos/arduino/Arduino/issues/3719/labels{/name}","comments_url":"https://api.github.com/repos/arduino/Arduino/issues/3719/comments","events_url":"https://api.github.com/repos/arduino/Arduino/issues/3719/events","html_url":"https://github.com/arduino/Arduino/issues/3719","id":102605959,"number":3719,"title":"Sketch upload hangs on certain Serial.println text on a Mega2560","user":{"login":"pepijn1978","id":13928111,"avatar_url":"https://avatars.githubusercontent.com/u/13928111?v=3","gravatar_id":"","url":"https://api.github.com/users/pepijn1978","html_url":"https://github.com/pepijn1978","followers_url":"https://api.github.com/users/pepijn1978/followers","following_url":"https://api.github.com/users/pepijn1978/following{/other_user}","gists_url":"https://api.github.com/users/pepijn1978/gists{/gist_id}","starred_url":"https://api.github.com/users/pepijn1978/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pepijn1978/subscriptions","organizations_url":"https://api.github.com/users/pepijn1978/orgs","repos_url":"https://api.github.com/users/pepijn1978/repos","events_url":"https://api.github.com/users/pepijn1978/events{/privacy}","received_events_url":"https://api.github.com/users/pepijn1978/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-08-23T10:06:08Z","updated_at":"2015-08-23T10:23:17Z","closed_at":null,"body":"If I try to upload this sketch below, the Arduino hangs:\r\n\r\nvoid setup() {\r\n\r\n  Serial.begin(115200);\r\n  Serial.println(\"EEPROM geschreven met P1_date !!!!\");\r\n\r\n}\r\n\r\nvoid loop() {\r\n\r\n}\r\n\r\nAny other text for Serial.println will do fine.\r\n\r\nThe sketch only hangs on my Mega2560. Not on my Uno."},"comment":{"url":"https://api.github.com/repos/arduino/Arduino/issues/comments/133813332","html_url":"https://github.com/arduino/Arduino/issues/3719#issuecomment-133813332","issue_url":"https://api.github.com/repos/arduino/Arduino/issues/3719","id":133813332,"user":{"login":"Chris--A","id":6584350,"avatar_url":"https://avatars.githubusercontent.com/u/6584350?v=3","gravatar_id":"","url":"https://api.github.com/users/Chris--A","html_url":"https://github.com/Chris--A","followers_url":"https://api.github.com/users/Chris--A/followers","following_url":"https://api.github.com/users/Chris--A/following{/other_user}","gists_url":"https://api.github.com/users/Chris--A/gists{/gist_id}","starred_url":"https://api.github.com/users/Chris--A/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Chris--A/subscriptions","organizations_url":"https://api.github.com/users/Chris--A/orgs","repos_url":"https://api.github.com/users/Chris--A/repos","events_url":"https://api.github.com/users/Chris--A/events{/privacy}","received_events_url":"https://api.github.com/users/Chris--A/received_events","type":"User","site_admin":false},"created_at":"2015-08-23T10:23:17Z","updated_at":"2015-08-23T10:23:17Z","body":"Sending three `!` during upload triggers the bootloader's device info tool. You can either print it in two commands:\r\n\r\n```C++\r\nSerial.print(\"EEPROM geschreven met P1_date !!\");\r\nSerial.println(\"!!\")\r\n```\r\n\r\nOr you can upgrade your bootloader, there is a newer version which does not include the feature triggered by `!!!`."}}