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iotServices

iotServices (to be renamed as Iiot Services) Cliente OPCUA con Servidor web. Incluye servidor OPCUA de demonstración. API backend express Frontend en Angular

Starting the web server

For installing and running the web server in development enviroment, use this command:

cd backend
npm i
npm run start:dev

Webserver also exposes a REST API for handling op.

METHOD ENDPOINT ACTION
GET / home page
GET /api/opcua/monitoring Return the list of monitored variables
POST /api/opcua/monitoring Add variables to the monitored items
DELETE /api/opcua/monitoring Remove variables to the monitored items
GET /api/opcua/value Return the value of the variable via nodeId
POST /api/opcua/value Set the value of the variable via nodeId

Starting the OPC UA demo server

If you don't have any OPC UA servers at hand, you can use the one included. For installing and running the OPC UA server, use this command:

cd opcua-server
npm i
npm run start

The OPC UA server exposes an endpoint at opc.tcp://localhost:4334/UA/MyLittleServer; it describes this structure:

  • MyDevice: ns=1;i=1000
    • MyVariable1: ns=1;i=1001 an autoincremental readonly value starting a 1
    • MyVariable2: ns=1;b=1020FFAA an read/write value initially set on 10
    • FreeMemory ns=1;s=free_memory the current free memory on the server