This adapter is used by WEB applications and adapters to communicate with ioBroker using websockets and the socket.io protocol.
Important Note: Since v4.0 of this adapter, pure Websockets are used exclusively! Socket.io is no longer implemented by the socket.io library but simulated via pure WebSockets!
Users can use this adapter to connect their products to ioBroker via web sockets. Actually, this adapter could be used by echarts, vis and many other adapters to extract data from ioBroker.
If possible, please use iobroker.ws instead of this adapter.
You can find in the example directory the simple application that uses this interface to show some data.
By using of socket.io interface user should understand the basics and concept of the system.
It is useful to read about the structure of the objects too.
This adapter uses Sentry libraries to automatically report exceptions and code errors to the developers. For more details and for information on how to disable the error reporting, see Sentry-Plugin Documentation! Sentry reporting is used starting with js-controller 3.0.
Object is a description of a data point or group. The group could content other data points in this case it called a channel. If a group consists of other channels, in this case it is called a device.
Object is meta-information that describes data point and could content: max/min value, unit, name, default value, type of value, information for adapter for communication (e.g., ip address) and so on.
State is the actual value of the data point and presented by a JavaScript object:
{
val: VALUE,
ack: ACKNOWLEDGED,
ts: TIMESTAMP, // could be converted into time with "new Date(state.ts)" (In older version of js-controller - "new Date(state.ts * 1000)")
lc: TIMESTAMP of last change,
from: ADAPTER_NAME,
q: QUALITY
}
States change themselves very frequently in comparison to the objects. (Normally objects should be changed once by creation, and that's all)
Every state has the attribute ack. It shows the direction of command.
- If ack=false, it means some other adapter wants to control (write) this variable, so that command will be executed (e.g., light will be switched on).
- If ack=true, it means that the device informs about new value. (e.g., light was switched on manually, or motion was detected)
Example: we have some home automation adapter (HAA) that has one lamp connected under address haa.0.lamp1.
- Lamp can be switched on manually with a physical switch or via Wi-Fi with the help of HAA.
- If vis wants to switch the lamp on via Wi-Fi, it should set the new value with
{value: true, ack: false}. - When the lamp is switched on it is normally informing HAA about new state and the value should be immediately overwritten with
{value: true, ack: true}. - If the lamp is switched off manually via physical switch it informs HAA about new state with
{value: false, ack: true}.
Every data point has an attribute q - quality.
You can find the description of every supported method here.
It is suggested to use socket class for communication.
On some web-sockets clients, there is a performance problem with communication. Sometimes this issue is due to the fallback of socket.io communication on a long polling mechanism. You can set the option Force Web-Sockets to force using only web-sockets transport.
- (@GermanBluefox) The listening port is reported to the registry of used resources of js-controller 8. Added
@iobroker/webserveras a direct dependency - (@GermanBluefox) Admin 7.6.20+ is required. Added Ukrainian and missing translations. Compact mode no longer can exit the whole host process
- (@GermanBluefox) Added
socket.ioas a direct dependency to fix the crash "socketClass is not a constructor" (#302)
- (iobroker-bot) Adapter requires node.js >= 22 now.
- (@GermanBluefox) Updated packages
- (@GermanBluefox) Updated packages
- (@GermanBluefox) Updated packages
- (@GermanBluefox) Moved socketio server classes to a separate package
- (@GermanBluefox) A minimal node.js version is 20
- (@GermanBluefox) Fixed possible problems
- (@GermanBluefox) Updated packages
Older changelogs can be found there
The MIT License (MIT), see LICENSE
Copyright (c) 2014-2026 @GermanBluefox [email protected]