{"action":"closed","issue":{"url":"https://api.github.com/repos/grbl/grbl/issues/666","labels_url":"https://api.github.com/repos/grbl/grbl/issues/666/labels{/name}","comments_url":"https://api.github.com/repos/grbl/grbl/issues/666/comments","events_url":"https://api.github.com/repos/grbl/grbl/issues/666/events","html_url":"https://github.com/grbl/grbl/issues/666","id":69942094,"number":666,"title":"running out of i/o pins and RS485","user":{"login":"alpha56","id":12055322,"avatar_url":"https://avatars.githubusercontent.com/u/12055322?v=3","gravatar_id":"","url":"https://api.github.com/users/alpha56","html_url":"https://github.com/alpha56","followers_url":"https://api.github.com/users/alpha56/followers","following_url":"https://api.github.com/users/alpha56/following{/other_user}","gists_url":"https://api.github.com/users/alpha56/gists{/gist_id}","starred_url":"https://api.github.com/users/alpha56/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alpha56/subscriptions","organizations_url":"https://api.github.com/users/alpha56/orgs","repos_url":"https://api.github.com/users/alpha56/repos","events_url":"https://api.github.com/users/alpha56/events{/privacy}","received_events_url":"https://api.github.com/users/alpha56/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2015-04-21T20:23:24Z","updated_at":"2015-05-17T02:11:56Z","closed_at":"2015-05-17T02:11:56Z","body":"I noticed how grbl is running out of I/O pins\r\nI was wondering how are you going to add SD when that requires four more pins and those pins are already being used?\r\n\r\nI'm looking into using RS485 as cheap long distance serial interface. I noticed there is one free pin left on the uno A4 to switch between TX and RX modes and looking at what additions are needed to serial.c to make this possible....\r\n\r\nAnyone else interested in not having that host PC sitting right on top of the CNC?"}}