Data field - downloading inital data

Hi,

I'm new to ConnectIQ development but already have a question. I'm planing to create a data field which needs to download some data to work properly but does not need an active connection during the activity. Is it possible to download some data as the device synchronises from the network after turning on for example?

If it's possible, where can I find code examples?

Thank you.

Travis.ConnectIQ over 7 years ago

If you only support devices with ConnectIQ 3.x support, you could use the new function AppBase.onAppInstall() and Background.registerForTemporalEvents() to schedule a download. Once the download has completed you can use Background.deleteTemporalEvent() to cancel the recurring temporal events and then use Background.exit() to send the downloaded data to the foreground process for storage with Storage.setValue() (or AppBase.setProperty()) and future use.

paha77 over 7 years ago

Thank you Travis, this is exactly what I needed.

paha77 over 7 years ago

I was able to do it like you've suggested, thank you.

What if I need to (re)download this data on a weekly basis? Is one of these functions called if my app is a data field and I just turn on the device?

App.AppBase.initialize()
App.AppBase.onStart()
App.AppBase.getInitialView()

I could check in one of these functions if I already have the data for this week and only register the temporal event if it's missing.

Thank you.

jim_m_58 over 7 years ago

You could have a temporal event that runs once a week and repeats, or use a specific time so it runs every monday at a certain time

paha77 over 7 years ago

Sorry I forgot to mention that I'm making this data field for my Edge 820 device which is not always turned on. Will this event be fired later if I schedule it to monday 0:01 and the device is powered off by that time?

jim_m_58 over 7 years ago

It will run the next time it can run.

Travis.ConnectIQ over 7 years ago

Yes, once you've got your initial update, you could re-schedule for once per week. You might also want to check that your data isn't way out of date, and if it is display something for the user so that they know about the condition.