IOSignal documentation

Connect servers and devices in real time

Learn to exchange messages across Node.js, browsers, and Arduino with runnable examples.

What would you like to build?

Choose a goal and follow the steps from setup to a working result.

Run the chat example and exchange messages in two browser tabs.

Connect a board, control its LED, and check the reported state.

Start a local server, then configure connection addresses and authentication.

Choose your platform after the quickstart.

Run a server or build a Node.js client.

Use the browser client with plain JavaScript or a framework.

Connect devices and exchange messages with web apps.

Test messaging with servers and clients in a terminal.

Build chat apps and browser-to-Arduino integrations.