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CoAP Too many observers

I want to 'Observe' resources in a CoAP server. But What I've noticed is that after I register to observe a few resources in the server, an additional resources I try to 'Observe' throw a message saying 'Too Many Observers'

I'm using Copper (Firefox) to connect to the servers.

Is there a limit of resources that can be observed with a CoAP server? Google isn't helping me out much here. Am I doing something wrong myself?

Thanks.

Solution

  • Coap observe draft doesn't set any limits to the numbers of observers. It just adds a design note about the maximum notification rate. It is just up to the device resources.

    As you can see in this coap implementation it replies "Too many observers" because the device has no more memory to allocate.