android - Max number of devices can GCM send push notifications to -

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i wondering limit max number of registered android devices can gcm send message to. know documentation says payload needs 4 kb in size, include list of gcm ids. size of each gcm id 160 bytes, can send multicast push notification 20 devices @ point?

based on official google documentation, specifies list of devices (bases on registration tokens or ids) receiving multicast message. must contain atleast 1 , @ 1000 registration tokens. multicast messaging, not single recipients. multicast messages (sending more 1 registration tokens) allowed using http json format only.

you may check official google documentation here: https://developers.google.com/cloud-messaging/http-server-ref


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