{"action":"created","issue":{"url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/issues/168","repository_url":"https://api.github.com/repos/arendst/Sonoff-Tasmota","labels_url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/issues/168/labels{/name}","comments_url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/issues/168/comments","events_url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/issues/168/events","html_url":"https://github.com/arendst/Sonoff-Tasmota/issues/168","id":212536374,"number":168,"title":"DS18B20 doesn't work on GPIO3","user":{"login":"KonstantinMastak","id":25936275,"avatar_url":"https://avatars3.githubusercontent.com/u/25936275?v=3","gravatar_id":"","url":"https://api.github.com/users/KonstantinMastak","html_url":"https://github.com/KonstantinMastak","followers_url":"https://api.github.com/users/KonstantinMastak/followers","following_url":"https://api.github.com/users/KonstantinMastak/following{/other_user}","gists_url":"https://api.github.com/users/KonstantinMastak/gists{/gist_id}","starred_url":"https://api.github.com/users/KonstantinMastak/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/KonstantinMastak/subscriptions","organizations_url":"https://api.github.com/users/KonstantinMastak/orgs","repos_url":"https://api.github.com/users/KonstantinMastak/repos","events_url":"https://api.github.com/users/KonstantinMastak/events{/privacy}","received_events_url":"https://api.github.com/users/KonstantinMastak/received_events","type":"User","site_admin":false},"labels":[{"id":527619885,"url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/labels/help%20wanted","name":"help wanted","color":"128A0C","default":true}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2017-03-07T19:37:52Z","updated_at":"2017-03-08T16:38:48Z","closed_at":null,"body":"On most Sonoff boards it is possoble to solder to GPIO3 as it RX and it usually has wires on board. So I tried to plug DS18B20 to GPIO3 in Sonoff Basic and Sonoff S20, but it doesn't work - \"Sensor busy\" error in logs. However, DS18B20 on GPIO4 or GPIO14 works perfectly. \r\n\r\nI looked through oscillograph and I see that GPIO3 is always low while it gets high for 1 or 2 seconds when ESP tries to poll DS18B20 . However, as far as I understand, it should be in reverse - always high while low when polling.\r\n\r\nI guessed that maybe it interferes with Serial output feature, but I set \"Serial log level\" to \"None\" and this doesn't help.\r\n\r\nWhat may be the reason of problem?"},"comment":{"url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/issues/comments/285093741","html_url":"https://github.com/arendst/Sonoff-Tasmota/issues/168#issuecomment-285093741","issue_url":"https://api.github.com/repos/arendst/Sonoff-Tasmota/issues/168","id":285093741,"user":{"login":"arendst","id":11044339,"avatar_url":"https://avatars0.githubusercontent.com/u/11044339?v=3","gravatar_id":"","url":"https://api.github.com/users/arendst","html_url":"https://github.com/arendst","followers_url":"https://api.github.com/users/arendst/followers","following_url":"https://api.github.com/users/arendst/following{/other_user}","gists_url":"https://api.github.com/users/arendst/gists{/gist_id}","starred_url":"https://api.github.com/users/arendst/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/arendst/subscriptions","organizations_url":"https://api.github.com/users/arendst/orgs","repos_url":"https://api.github.com/users/arendst/repos","events_url":"https://api.github.com/users/arendst/events{/privacy}","received_events_url":"https://api.github.com/users/arendst/received_events","type":"User","site_admin":false},"created_at":"2017-03-08T16:38:48Z","updated_at":"2017-03-08T16:38:48Z","body":"Stupid of me to provide access to GPIO03 ;-)\r\n\r\nIt works for me if I disable serial with ``seriallog 0`` and connecting the DS18B20 to Gnd, GPIO03 and 3V3 all available on the pin header of a sonoff basic. It also needs a resistor between 3V3 and GPIO03."}}
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