ME63
Connecting to the cloud

Valves and Sensors on a common bus

The MEx3 is the Gateway from Edip to multiple industrial protocols including OPCua

With a single board computer like a Raspberry Pi, as the hardware platform we can utilize a number of open source projects from control, visualize, and log to the cloud.

For cloud logging Node-Red is a versatile option.

OPCua Client

Node Red Flow 

Connecting any OPCua with a cloud server is relatively straight forward, I would certainly suggest a TSDB (Time Series DataBase) Like Influx or Graphite. These are designed for high volumes of raw information and contain built in data retention managers.

Node-Red makes life simple and with 3 blocks data can be subscribed, parsed and posted.

First we use the pallet Opcua-Browse-Subscribe. Enter the endpoint, and topic. The specific topic can be verified by browsing the  endpoint with a OPCua Client UaExpert. Once the  initial information is completed you need to deploy the flow and wait for the connection to be established. Once connected simply select the topics to subscribe to.


Each subscription will then produce a separate message on update. The subscription message needs to be processed and formatted for Graphite in our test case so a simple function can be created.


The last node in the flow is a simple TCP-Out node with the connection details for the graphite server

# Edip