Matter~

#define USE_MATTER_DEVICE

What is Matter?~

The Matter protocol is an open-source, royalty-free standard designed to enable smart home devices from different manufacturers to work seamlessly and securely together. The Matter standard was launched end of 2022, and is supported since July 2023 by Tasmota v13.0 and above. Learn more about Matter.

Tasmota supports Matter over IP (Wi-Fi or Ethernet) as an end-device. This means that you can connect a Tasmota device to a Matter gateway, using standard and well defined protocols. The Matter communication is completely local.

Matter cannot be directly supported on ESP8266 due to limited memory resources but you can use an ESP32 device as a Matter bridge to other Tasmota and OpenBK devices.

Supported platforms~

Tasmota Matter is confirmed to work with:

• Apple Home - requirements
• Amazon Alexa - requirements
• Espressif-Matter iOS/Mac app
• Google Home - only works after following these instructions
• Home Assistant

More information on pairing with above mentioned smart home systems.

Getting Started~

Matter is supported by default. The binaries are available for all ESP32 variants in our web installer

Go to Configuration --> Configure Matter and enable Matter with the checkmark then click Save.

After a restart device commissioning will be open for 10 minutes.

Add the device to your Matter hub by scanning the QR code or with the "Manual pairing code" if code scanning is not possible.

Configuration~

After Matter support is enabled the Configuration --> Configure Matter menu is used to configure options.

Here you can enable/disable Matter or open commissioning again if needed.

Current Configuration~

Configuration of your device for Matter discovery. Tasmota tries to configure supported features automatically.

You can change the name of the Matter endpoint, switch its Parameter number or remove the endpoint by clicking the 🔥 icon.

After changing these options click Change configuration.

Add to configuration~

Add local sensor or device~

To add new features you need to add Endpoints.

Name~

Name your endpoint to give it a label in your Matter hub (might not be supported by all hubs)

Type~

Select your endpoint type from the drop down. Types are limited by the Matter specification and some types might not be supported by the Matter hub.

Parameter~

To link a Tasmota power output (light/relay) to an endpoint set its parameter equal to the POWER number.

To link a Tasmota sensor to an endpoint add the rule trigger of the sensor to the Parameter value.

MQT: tele/tasmota/SENSOR = {"Time":"2023-05-28T20:04:27","SCD40":{"CarbonDioxide":618,"eCO2":623,"Temperature":23.8,"Humidity":61.1,"DewPoint":15.8},"TempUnit":"C"}

After entering click Create new endpoint and it will appear in the Current configuration list

Add Remote Tasmota or OpenBK~

With this option you can bridge any existing Tasmota or OpenBK device to Matter.

Enter the IP or hostname of the remote device and click Auto-configure remote Tasmota

This will bring you to another menu where you can further configure the remote device.

Add remote Endpoints same as for a local sensors and devices.

When finished click Add endpoints. The remote device will appear in the Current configuration list.

When a command arrives from the Matter controller, it is passed immediately to the end-device. Any change made on the end-device is eventually sent back to Matter controller via polling. Polling is done every 3 seconds for lights and relays and every 5 seconds for sensors.

The Matter border router needs to have IP connectivity to the Tasmota end-device to send HTTP requests. However they don't need to be on the same VLAN (contrary to Matter which needs the controller and the device to be on the same VLAN).

Reset all and Auto-discover~

This option will reset all configured endpoints and try to auto discover them again.

Advanced Configuration~

Matter Passcode~

You can change the passcode and ID of the device or force it to use IPv4 only.

Fabrics~

In short fabrics are Matter node identifiers. Long story here....

Deleting a Fabric will remove its commissioned status from the Matter hub.

Known Limitations~

Matter support is still in testing, there are some limitations:

• Matter requires IPv6 support, yet IPv4 is often tolerated. For debug purpose you can force Tasmota to manage Matter only on IPv4
• Tasmota devices with dual active networks (Ethernet + Wifi) are not yet supported. You need to disable Wifi or Ethernet. For example use Ethernet Network Flipper
• Tasmota cannot be Matter certified, it uses development vendor id's, which typically raise user warnings when commissioning the device
• Matter is also in an early phase with hub development and not all hubs support all Matter device types yet

What's not suported:

• Thread as it requires a separate MCU. The number of Thread devices is still very limited.
• ESP8266 directly because of limited memory resources and lack of Berry support but you can add them to Matter via the Remote option
• Zigbee (it will come later)

Matter Command Events~

Whenever a command is received from the controller, an event is generated and published to MQTT. This event can be matched by a rule.

Example:

20:08:36.201 MQT: stat/tasmota_xxxxxx/COMMAND = {"MtrReceived":{"9":{"Ep":9,"Name":"Light0","Power":1}}}

Note: only commands trigger an event (Controller to Tasmota). When a sensors updates the controller (Tasmota to Controller), it is not considered as a command but as an update of internal state.

Endpoints are identified both by endpoint number "Ep":<x> and by name if a friendlyname is defined "Name":"<friendlyname>". The formatting of MQTT topic and JSON payload use the same SetOption's as Zigbee.

Examples below consider an endpoint number 9 with friendlyname Light0:

To reset all options, use:

Backlog SO83 0; SO89 0; SO100 0; SO112 0; SO118 0; SO119 0; SO125 0; SO144 0

Matter Virtual Devices~

Since v13.1.0.3, it is possible to define "virtual devices" (lights, sensors...) visible from the controller but that do not map to an actual device or sensors managed by Tasmota. You can completely customize the behavior of the virtual device with rules or Berry scripts:

• whenever the controller sends a command, it generates a "Matter Command Event" JSON payload that you handle with rules
• you send back updates of the status of the device when you want via MtrUpdate command. Updates are automatically sent back to the controller via hidden Matter subscription.

MtrUpdate command~

MtrUpdate is used to signal to the Matter controller that the internal state of an endpoint has changed, either because of a user action or because of a new sensor reading. When you update an internal state variable, and if the value actually change, an attribute report message is sent immediately to the controller to signal the change. This ensures that Matter applications are promptly notified. In case of multiple controllers, multiple report messages are automatically sent.

There are 2 ways to identify an endpoint:

• "Ep":<ep_number> via the endpoint number
• "Name":"<friendly_name>" (preferred) via the friendly_name of the endpoint if one has been set.

Example:

MtrUpdate {"ep":9, "Power":0}
20:44:57.852 MQT: stat/tasmota_xxxxxx/RESULT = {"MtrUpdate":{"Ep":9,"Name":"Light0","Power":false}}

MtrUpdate {"Name":"Light0", "Power":1}
20:45:27.457 MQT: stat/tasmota_xxxxxx/RESULT = {"MtrUpdate":{"Ep":9,"Name":"Light0","Power":true}}

If the endpoint is valid, the returned payload contains the entire state of the endpoint, similar to MtrInfo command.

List of attributes supported by endpoints:

Keep in mind that many values are in the range 0..254 because 255 is an invalid value (this comes from Zigbee).

Full Example~

The example below implements a simple bridge between Matter and IR (Infra Red). This allows to trigger On/Off commands from the Matter controller, that are translated to On/Off infra-red commands (we use the simple NEC protocol in the example, like used in Magic Home LED strips). You can also received On/Off infra-red commands that are reflected in the virtual light. In reality, you will probably use only Matter-to-IR or IR-to-Matter direction, but it doesn't harm to have both directions implemented.

We will use a Tasmota Relay via Power1 and map it with rules to a virtual Light0 type.

Step 1. Define one endpoint as (v) Light 0 On and give it the name Light0.

Step 2. Define rules for Matter Controller commands

We use SetOption83 1 to match endpoint name instead of number, which is highly recommended for easier maintenance.

SetOption83 1
Rule1 on mtrreceived#Light0#power==1 do irsend {"protocol":"nec","bits":32,"data":"0xffb04f"} endon on mtrreceived#Light0#power==0 do irsend {"protocol":"nec","bits":32,"data":"0xfff807"} endon on irreceived#data=0xFFB04F do mtrupdate {"name":"Light0","power":1} endon on irreceived#data=0xFFF807 do mtrupdate {"name":"Light0","power":0} endon
Rule1 1

If we decompose the Rule, the first two rule matches convert a Matter initiated command to an IR message, the two last convert an IR message to a Matter state update:

Rule1
    on mtrreceived#Light0#power==1 do irsend {"protocol":"nec","bits":32,"data":"0xffb04f"} endon
    on mtrreceived#Light0#power==0 do irsend {"protocol":"nec","bits":32,"data":"0xfff807"} endon
    on irreceived#data=0xFFB04F do mtrupdate {"name":"Light0","power":1} endon
    on irreceived#data=0xFFF807 do mtrupdate {"name":"Light0","power":0} endon 

Step 3. Pair Tasmota to the Matter Controller.

Commands~

Misc Events~

Events published as JSON MQTT that can be captured in rules:

{"Matter":{"Initialized":1}}
when the device is configured (all endpoints created). Can be used in rules with trigger Matter#Initialized

{"Matter":{"Commissioning":1,"PairingCode":"00054912336","QRCode":"MT:Y.K90IRV01YZ.548G00"}}
when commissioning is open

{"Matter":{"Commissioning":0}}
when commissioning is closed

For developers~

Developers might be interested in understanding the Tasmota Matter Internals