This is an hacs integration using asyncua to connect various industrial PLC to HA. My initial approach was to develop a gateway which connect the PLC over RESTful API. After a couple of integration for projects, I found that it would be beneficial to the community to have a custom integration in HA for OPC UA servers.
I found an older project which uses the python-opcua, which is deprecated and decided to start a new integration using opcua-asyncio.
Repository
input field and select Integration for the Categeroy dropdown select.This integration is developed with the option to connect multiple OPCUA servers, as it is commonly used in an industrial environment.
Paste the following lines to your configuration.yaml
file. Remove or add more OPCUA servers as required. Specify a unique name for each server, under the key name
.
asyncua:
- name: "plc-01" # Unique name to identify the server. Will be used by the sensors to indicate which server to get the node value.
url: "opc.tcp://localhost:4840/" # URL of the server.
scan_interval: 10 # Optional. Interval for coordinator to read from OPCUA. Default is set at 30s.
username: admin # Optional username
password: admin # Optional password
- name: "plc-02"
url: "opc.tcp://localhost2:4840/"
scan_interval: 10
username: admin
password: admin
To add a custom sensor entity, paste the following example into your configuration.yaml
file and make the necessary changes
sensor:
- platform: asyncua
nodes:
- name: sensor-01 # Name of the sensor
unique_id: sensor-01 # Unique ID of the sensor
device_class: temperature # Device class according to Homeassistant sensors
hub: plc-01 # OPCUA unique name defined in the coordinator that serve the data.
nodeid: "ns=1;s=3000" # Node id from OPCUA server
unit_of_measurement: °C # Optional unit of measurement.
- name: sensor-02
unique_id: sensor-02
device_class: temperature
hub: plc-02
nodeid: "ns=1;s=3000"
unit_of_measurement: °C
To add a custom sensor entity, paste the following example into your configuration.yaml
file and make the necessary changes
binary_sensor:
- platform: asyncua
nodes:
- name: "binary-sensor-01" # Desired unique name
unique_id: "binary-sensor-01" # Desired unique_id
hub: "plc-01" # Device class according to Homeassistant binary_sensor
nodeid: "ns=1;s=1000" # Node id from OPCUA server
- name: "binary-sensor-02" # Desired unique name
unique_id: "binary-sensor-02" # Desired unique_id
hub: "plc-02" # Device class according to Homeassistant binary_sensor
nodeid: "ns=1;s=1000" # Node id from OPCUA server
Will be included in the future.
To write value to a node, a service can be called from Developer Tools -> Services -> asyncua: set value.
Ensure that a asyncua coordinator is defined.
Paste the following code sample in UI Mode
and make the necessary changes
hub: plc-01
nodeid: ns=1;s=1000
value: false
In YAML Mode
, paste the following code sample and make the necessary changes
service: asyncua.set_value
target: {}
data:
hub: plc-01
nodeid: ns=1;s=1000
value: false