README.md

OPC UA Reader

Name	OPC UA Reader
Version	v1.0.0
DockerHub	weevenetwork/opcua-reader
Authors	Mesud Pasic

• OPC UA Reader
  • Description
  • Features
  • Environment Variables
    • Module Specific
    • Set by the weeve Agent on the edge-node
  • Dependencies

Description

OPC UA Reader reads values for variables and forwards the payload to next module.

Environment Variables

Environment Variables	type	Description
OPC_UA_SERVER	string	OPC UA Server endpoint
MAX_RETRY	integer	Max retry for connection
NODE_ID	string	Node ID to connect to
VARIABLE_LIST	string	Comma separated list of variables to read
OPC_UA_USERNAME	string	Username if authentication is required
OPC_UA_PASSWORD	string	Password if authentication is required

Module Specific

Set by the weeve Agent on the edge-node

Environment Variables	type	Description
MODULE_NAME	string	Name of the module
INGRESS_HOST	string	Host where app is running
INGRESS_PORT	string	Port where app is running
EGRESS_URLS	string	HTTP ReST endpoint for the next module

Output sent to next module looks like this

  {
    timestamp: <timestamp value>,
    value: <value of the variable>,
    name: <name of the variable>,
  }

Dependencies

"dependencies": {
    "express": "^4.17.3",
    "express-winston": "^4.2.0",
    "node-fetch": "^2.6.1",
    "node-opcua": "^2.71.0"
}