{"action":"created","issue":{"url":"https://api.github.com/repos/iot-lab/iot-lab/issues/191","labels_url":"https://api.github.com/repos/iot-lab/iot-lab/issues/191/labels{/name}","comments_url":"https://api.github.com/repos/iot-lab/iot-lab/issues/191/comments","events_url":"https://api.github.com/repos/iot-lab/iot-lab/issues/191/events","html_url":"https://github.com/iot-lab/iot-lab/issues/191","id":68399576,"number":191,"title":"Control node sniffer does not see hardware generated acks","user":{"login":"cladmi","id":241401,"avatar_url":"https://avatars.githubusercontent.com/u/241401?v=3","gravatar_id":"","url":"https://api.github.com/users/cladmi","html_url":"https://github.com/cladmi","followers_url":"https://api.github.com/users/cladmi/followers","following_url":"https://api.github.com/users/cladmi/following{/other_user}","gists_url":"https://api.github.com/users/cladmi/gists{/gist_id}","starred_url":"https://api.github.com/users/cladmi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cladmi/subscriptions","organizations_url":"https://api.github.com/users/cladmi/orgs","repos_url":"https://api.github.com/users/cladmi/repos","events_url":"https://api.github.com/users/cladmi/events{/privacy}","received_events_url":"https://api.github.com/users/cladmi/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/iot-lab/iot-lab/labels/Gateway","name":"Gateway","color":"000000"}],"state":"open","locked":false,"assignee":{"login":"cladmi","id":241401,"avatar_url":"https://avatars.githubusercontent.com/u/241401?v=3","gravatar_id":"","url":"https://api.github.com/users/cladmi","html_url":"https://github.com/cladmi","followers_url":"https://api.github.com/users/cladmi/followers","following_url":"https://api.github.com/users/cladmi/following{/other_user}","gists_url":"https://api.github.com/users/cladmi/gists{/gist_id}","starred_url":"https://api.github.com/users/cladmi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cladmi/subscriptions","organizations_url":"https://api.github.com/users/cladmi/orgs","repos_url":"https://api.github.com/users/cladmi/repos","events_url":"https://api.github.com/users/cladmi/events{/privacy}","received_events_url":"https://api.github.com/users/cladmi/received_events","type":"User","site_admin":false},"milestone":null,"comments":3,"created_at":"2015-04-14T14:48:54Z","updated_at":"2015-04-14T15:26:16Z","closed_at":null,"body":"https://github.com/rousselk pointed out that he does not receives hardware generated ACKs with the sniffer"},"comment":{"url":"https://api.github.com/repos/iot-lab/iot-lab/issues/comments/92908457","html_url":"https://github.com/iot-lab/iot-lab/issues/191#issuecomment-92908457","issue_url":"https://api.github.com/repos/iot-lab/iot-lab/issues/191","id":92908457,"user":{"login":"cladmi","id":241401,"avatar_url":"https://avatars.githubusercontent.com/u/241401?v=3","gravatar_id":"","url":"https://api.github.com/users/cladmi","html_url":"https://github.com/cladmi","followers_url":"https://api.github.com/users/cladmi/followers","following_url":"https://api.github.com/users/cladmi/following{/other_user}","gists_url":"https://api.github.com/users/cladmi/gists{/gist_id}","starred_url":"https://api.github.com/users/cladmi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cladmi/subscriptions","organizations_url":"https://api.github.com/users/cladmi/orgs","repos_url":"https://api.github.com/users/cladmi/repos","events_url":"https://api.github.com/users/cladmi/events{/privacy}","received_events_url":"https://api.github.com/users/cladmi/received_events","type":"User","site_admin":false},"created_at":"2015-04-14T15:26:16Z","updated_at":"2015-04-14T15:26:16Z","body":"The diagram represents in order:\r\n\r\n1. radio receiving packet\r\n2. software reading packet in frame buffer\r\n3. radio receiving ack\r\n4. software reading ack\r\n\r\n![timeline](https://cloud.githubusercontent.com/assets/241401/7140322/ee743b78-e2ca-11e4-8832-4fb86668af87.png)\r\n\r\nDelay between ack_sfd_irq and pkt_rx_end 61.000000 us\r\nWhere timer frequency is precise at 30.5us\r\n\r\nTime between end of reading and new packet is quite low and may need to be reduced to ensure ack reception."}}