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Ably Help Center

Realtime API and client libraries

Realtime API and client libraries

Common questions and issues with the Realtime API

Platform support

How do I use Ably with an Arduino, or some other c/c++ platform?

Can I use ably-js with webpack?

How do I use Ably with Flutter?

How do I use ably-js with Shep?

Connections

Optimising Ably connections to minimize battery usage

Is a connection ID globally unique?

Can a single connection be shared across multiple browser tabs?

Should I monitor for non-2xx network requests to identify issues?

How can I see who is connecting to my app?

How do I find out about all the connections being made to my app?

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Common issues

ably-java: "java.io.IOException: readBufferBytes failed" exception when making REST requests

When I try installing ably-js with npm, I get " Error while executing: /usr/bin/git ls-remote -h -t https://github.com/ably-forks/msgpack-js.git"

SSL certificate issues communicating with Ably

Why am I seeing a deprecation warning when serving Javascript files from your CDN?

Why am I seeing every message multiple times?

Why are my peak connection counts higher than expected?

ClassNotFoundException when using Proguard with ably-java

Why is my subscribe listener being called multiple times per message?

When using ably-js in Electron from a renderer process, the renderer process crashes after ~30s

Using ably-js-react native, connection attempts or rest requests appear to timeout immediately

"CORB blocked cross-origin response" error when using ably-js from a contentScript scope in a Chrome extension in Chrome 73+

Warning about "setting a timer for a long period of time" when using ably-js-react-native on android

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Authentication

Is it possible to dynamically change the channels a user has access to without disconnecting?

Is it necessary to implement auto-renewal of tokens when using Token Auth?

Can an existing connection's token capabilities be upgraded or downgraded?

Do you have a max TTL for tokens?