💾 Arduino_open62541

This library provides an implementation of OPC/UA by porting the Fraunhofer open62541 for the Arduino Opta microPLC family.

How-to-OPC/UA

• Compile and upload examples/opcua_server

arduino-cli compile --fqbn arduino:mbed_opta:opta -v examples/opcua_server -u -p /dev/ttyACM0

• Connect Arduino Opta Ethernet port with a DHCP-enabled router, switch, etc.
• Open a serial monitor

$ cat /dev/ttyACM0 
[2024-06-21 02:30:19.000 (UTC+0000)] info/eventloop	Starting the EventLoop
[2024-06-21 02:30:19.000 (UTC+0000)] warn/server	AccessControl: Unconfigured AccessControl. Users have all permissions.
[2024-06-21 02:30:19.000 (UTC+0000)] info/server	AccessControl: Anonymous login is enabled
[2024-06-21 02:30:19.000 (UTC+0000)] warn/server	x509 Certificate Authentication configured, but no encrypting SecurityPolicy. This can leak credentials on the network.
[2024-06-21 02:30:19.000 (UTC+0000)] info/server	Arduino Opta IP: 192.168.8.137
[2024-06-21 02:30:19.000 (UTC+0000)] info/server	Arduino Opta Variant: Arduino Opta WiFi
[2024-06-21 02:30:19.000 (UTC+0000)] info/server	stack: size = 16384 | free = 14936 | used = 1448 | max = 5124
[2024-06-21 02:30:19.000 (UTC+0000)] info/server	o1heap: capacity: 261984 | allocated: 66784 | peak_allocated: 68896
[2024-06-21 02:30:19.000 (UTC+0000)] warn/server	Maximum SecureChannels count not enough for the maximum Sessions count
[2024-06-21 02:30:19.000 (UTC+0000)] info/network	TCP	| Listening on all interfaces
[2024-06-21 02:30:19.000 (UTC+0000)] info/network	TCP 604353888	| Creating listen socket for "127.0.0.1" (with local hostname "192.168.8.137") on port 4840
[2024-06-21 02:30:19.000 (UTC+0000)] info/server	New DiscoveryUrl added: opc.tcp://192.168.8.137:4840

• Connect to OPC/UA server using IP/port as printed by the Arduino Opta

How-to-opcua-client-gui

cd /tmp
git clone https://github.com/FreeOpcUa/opcua-client-gui && cd opcua-client-gui
python3 -m pip install --upgrade pyopenssl
python3 -m pip install --upgrade .

How-to-enable detailed heap/stack memory debugging information

• Edit variants/OPTA/conf/mbed_app.json

"target.macros_add": [
  ...
+  "MBED_HEAP_STATS_ENABLED=1",
+  "MBED_STACK_STATS_ENABLED=1",
+  "MBED_MEM_TRACING_ENABLED=1"

• Recompile libmbed.a

cd ArduinoCore-mbed
./mbed-os-to-arduino -a -g OPTA:OPTA