{"action":"created","issue":{"url":"https://api.github.com/repos/sandeepmistry/noble/issues/264","labels_url":"https://api.github.com/repos/sandeepmistry/noble/issues/264/labels{/name}","comments_url":"https://api.github.com/repos/sandeepmistry/noble/issues/264/comments","events_url":"https://api.github.com/repos/sandeepmistry/noble/issues/264/events","html_url":"https://github.com/sandeepmistry/noble/issues/264","id":116708405,"number":264,"title":"Run example enter-exit.js with 25 iBeacon - Not good","user":{"login":"tinamore","id":2157845,"avatar_url":"https://avatars.githubusercontent.com/u/2157845?v=3","gravatar_id":"","url":"https://api.github.com/users/tinamore","html_url":"https://github.com/tinamore","followers_url":"https://api.github.com/users/tinamore/followers","following_url":"https://api.github.com/users/tinamore/following{/other_user}","gists_url":"https://api.github.com/users/tinamore/gists{/gist_id}","starred_url":"https://api.github.com/users/tinamore/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tinamore/subscriptions","organizations_url":"https://api.github.com/users/tinamore/orgs","repos_url":"https://api.github.com/users/tinamore/repos","events_url":"https://api.github.com/users/tinamore/events{/privacy}","received_events_url":"https://api.github.com/users/tinamore/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-11-13T06:18:39Z","updated_at":"2015-11-20T00:41:52Z","closed_at":null,"body":"Hi\r\n\r\nI have 25 iBeacon with Broadcast interval is: 1000ms (1 second), and Tx Power of each iBeacon is strong enough to send Bluetooth Adapter (I used USB bluetooth CSR 4.0 Dongle)\r\n\r\nI set: EXIT_GRACE_PERIOD = 15000 (15 second), that is 15 times the opportunity to receive signals from Ibeacon.\r\n\r\nThe problem: Sometimes (1 - 3 minutes) I see a few ibeacon exit, This is undesirable.\r\n\r\nI have a question:\r\nI do not want to increment EXIT_GRACE_PERIOD, I don't want to wait too long to detect iBeacon exit (15 second is long enough). Also, I don't want  reduce Broadcast interval of ibeacon (reduce the battery's life time).\r\n\r\nCan Node ble supports multiple USB adapter during a Scan ? Like it is:\r\n```\r\nsudo NOBLE_HCI_DEVICE_ID=0,1 node <your file>.js\r\n```\r\nMay be, Same time run 2 USB adapter (ID=0 and 1) for receive signals from Ibeacon), This solution will increase the chance of receiving signals from Ibeacon.\r\n\r\nOr anyone can help me slove my problem.\r\n\r\nThanks.\r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/sandeepmistry/noble/issues/comments/158244614","html_url":"https://github.com/sandeepmistry/noble/issues/264#issuecomment-158244614","issue_url":"https://api.github.com/repos/sandeepmistry/noble/issues/264","id":158244614,"user":{"login":"sandeepmistry","id":1163840,"avatar_url":"https://avatars.githubusercontent.com/u/1163840?v=3","gravatar_id":"","url":"https://api.github.com/users/sandeepmistry","html_url":"https://github.com/sandeepmistry","followers_url":"https://api.github.com/users/sandeepmistry/followers","following_url":"https://api.github.com/users/sandeepmistry/following{/other_user}","gists_url":"https://api.github.com/users/sandeepmistry/gists{/gist_id}","starred_url":"https://api.github.com/users/sandeepmistry/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sandeepmistry/subscriptions","organizations_url":"https://api.github.com/users/sandeepmistry/orgs","repos_url":"https://api.github.com/users/sandeepmistry/repos","events_url":"https://api.github.com/users/sandeepmistry/events{/privacy}","received_events_url":"https://api.github.com/users/sandeepmistry/received_events","type":"User","site_admin":false},"created_at":"2015-11-20T00:41:52Z","updated_at":"2015-11-20T00:41:52Z","body":"@tinamore the issues you are seeing are probably not related to noble specifically.\r\n\r\nIt's more likely they are caused by the Bluetooth adapter you are using. I expect you'll see similar behaviour running the following command: ```sudo hcitool lescan --duplicates```\r\n\r\n> I keep RSSI_THRESHOLD = -90. Because, this value is minimum capture signal. If set value of RSSI_THRESHOLD > -90 then the adapter will be difficult to capture signals ?\r\n\r\nA higher value would trigger and exit event when the beacon is closer in range."}}