I have one single Gmail account signed up for C2DM.
What I would like is that my app, thanks to this account (after having requested registration IDs and auth tokens for each device), could be able to provide messages to all the devices in which the app is installed.
I want to know if is it possible to use the C2DM in this way..
Thanks a lot
(for any details, just ask me.. )
ps I made the c2dm work on the emulator, but of course I cannot try what written before because I would need several phones..
Going off your question and comments, it sounds like you're just wondering if you can send c2dm notifications to an indeterminate number of devices using only one sender id.
That is exactly the way c2dm is supposed to work. You create one sender id to use on your backend servers, and that sender id is used in your app to register for c2dm notifications. Your backend then gathers all registrations ids and uses your one sender id to push notifications interested parties.