This is the accompanying example application for the OPC UA talk. It is an application based on 4DIAC. 4DIAC provides two main components: an IDE and a runtime environment (forte).
This application can be edited with the 4DIAC IDE.
This application is intended to run on a Raspberry Pi with SysFS GPIO support for controlling the LEDs.
However, you can also install the 4DIAC runtime, and this application, on any other machine supporting 4DIAC. It might only be that you have no blinking LED in this case.
The generic steps are:
- Install "forte" with OPC UA support
- Run
FORTE_BOOT_FILE=<path-to>/ece1_RaspberryPI.fboot forte
The ece1_RaspberryPI.fboot is located in this repository at
fboot/ece1_RaspberryPI.fboot.
Fedora already provides 4DIAC, so you can simply install this by executing (you can do the same for RHEL/CentOS if you enable EPEL):
sudo dnf install 4diac-forte
Then copy the "boot file" to /etc/4diac-forte-boot, and then enable and start 4DIAC:
sudo systemctl enable --now 4diac-forte
Note: The next steps allow unauthorized access to this device. Think twice before you do this.
If you want to access the OPC UA server from outside the device, you need to open the firewall port:
sudo firewall-cmd --zone=public --add-port=4840/tcp --permanent
sudo firewall-cmd --reload
The same is true for the 4DIAC IDE monitor port:
sudo firewall-cmd --zone=public --add-port=61499/tcp --permanent
sudo firewall-cmd --reload