apache/plc4x

[Missing Feature]: Issue with PLC4J BACnet Driver - Active Connections Not Supported

zhucPPl opened this issue · 3 comments

zhucPPl commented

What happened?

Content:
I have encountered an issue while using the plc4j-driver-bacnet (version 0.12.0). Upon creating a connection, I received the following error message: "Active connections not yet supported." Upon inspecting the source code, I discovered that the issue stems from the protocol being set to passive=false. Further investigation revealed that none of the supported transports (udp, tcp) are returning true, indicating that they do not support active connections. Additionally, when attempting to use the 'pcap' transport, I received the error message "Unsupported transport pcap," which has left me confused.

Here is the relevant code snippet:

java
String connectionString = "bacnet-ip:pcap://127.0.0.1:47808";
PlcConnection plcConnection = PlcDriverManager.getDefault().getConnectionManager().getConnection(connectionString);

I can confirm that the address used in the connection string is valid, as I have successfully implemented BACnet using bacnet4j. Currently, I have utilized plc4j to implement the modbus and knx protocols without issues, but encountered this problem while implementing the BACnet protocol. I would greatly appreciate any assistance in resolving this matter. Thank you.

Version

v0.12.0

Programming Languages

  • plc4j
  • plc4go
  • plc4c
  • plc4net

Protocols

  • AB-Ethernet
  • ADS /AMS
  • BACnet/IP
  • CANopen
  • DeltaV
  • DF1
  • EtherNet/IP
  • Firmata
  • KNXnet/IP
  • Modbus
  • OPC-UA
  • S7
chrisdutz commented

This is actually not a bug.
Active communication in Java has never been implemented.
The beginning of the bacnet driver was a paid gig, where I had to build a driver to passively observe a bacnet network.

Sebastian worked hard on an active version in go. Not quite sure about the state there.

Right now I have no plans to do the implementation of an active bacnet driver in Java.

Perhaps others can help here or you want to get your fingers dirty :-)

I think the heavy lifting of defining all the types is done and finished.

Chris

zhucPPl commented

Thank you for your answer and for your hard work

sruehl commented

BACnet in golang is not usable yet