{"action":"opened","issue":{"url":"https://api.github.com/repos/etwmc/Personal-HomeKit-HAP/issues/49","labels_url":"https://api.github.com/repos/etwmc/Personal-HomeKit-HAP/issues/49/labels{/name}","comments_url":"https://api.github.com/repos/etwmc/Personal-HomeKit-HAP/issues/49/comments","events_url":"https://api.github.com/repos/etwmc/Personal-HomeKit-HAP/issues/49/events","html_url":"https://github.com/etwmc/Personal-HomeKit-HAP/issues/49","id":98633831,"number":49,"title":"Silly question about sensor value update","user":{"login":"UniversalMailer","id":2736072,"avatar_url":"https://avatars.githubusercontent.com/u/2736072?v=3","gravatar_id":"","url":"https://api.github.com/users/UniversalMailer","html_url":"https://github.com/UniversalMailer","followers_url":"https://api.github.com/users/UniversalMailer/followers","following_url":"https://api.github.com/users/UniversalMailer/following{/other_user}","gists_url":"https://api.github.com/users/UniversalMailer/gists{/gist_id}","starred_url":"https://api.github.com/users/UniversalMailer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/UniversalMailer/subscriptions","organizations_url":"https://api.github.com/users/UniversalMailer/orgs","repos_url":"https://api.github.com/users/UniversalMailer/repos","events_url":"https://api.github.com/users/UniversalMailer/events{/privacy}","received_events_url":"https://api.github.com/users/UniversalMailer/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-08-02T20:07:48Z","updated_at":"2015-08-02T20:07:48Z","closed_at":null,"body":"Hi,\r\n I'm trying to create a simple temperature sensor with your Homekit HAP but I'm not sure I fully understood the architecture: looking at Accessory.cpp it's pretty straightforward that the callback 'valueChangeFunctionCall' is invoked when the controller sets a new value for the characteristics but it's not clear (at least to me) what is the sibling 'read' callback.\r\n\r\nThe question is: is there a callback that is called whenever the controller asks for the current state? In the temperature example, I would like to return the current temperature (based on a call to an http server or whatever) but I wasn't able to do so.\r\nI tried extending an intCharacteristics to my custom characteristics that override the constructor, value() and setValue() methods, to no avail: 'value()' is never changed...\r\n\r\nAny hint on this?\r\n\r\nThanks!"}}