Drivers

Use the config entry useJsonForSimpleEvent to specify that JSON format should be used instead of the old format.

For conditional events the DPE defined by the config entry conditionEventDp is used.

The limit of 255 agents per driver has been removed. In the past, this limit could be increased using the config entry [snmpdrv] maxAgents configuration entry which has now been removed.

The behavior of the SNMP driver in redundant systems has been changed. Previously, the SNMP driver did not use "<DP>_2" data points for connection data points. This meant that the SNMP driver could not provide separate status information for an agent connection in a redundant system. Previously, only the active driver set the status. This has now been changed in 3.20. In a redundant project the corresponding "<DP>_2" DPs for the types _SNMPAgent and _SNMPV3Entity will be created by default. Please note this if you use status information from these DPs in your project.

As an alternative, you can use the configuration entry useReduPostfix. It can be used to set the old behavior. Use this config entry only if it is really necessary, as in this case the fwdDpType config.redu entries, which refer to the data point types mentioned above, must be removed in order to achieve the old behavior.

The WinCC OA BACnet driver supports the data connection protocols BACnet/IP and BACnet/Secure Connect (BACnet/SC).

To configure the web socket connection, security certificates must be defined. To define the certificates, use the mandatory configuration entries secureCACertificate, secureCertificate and secureCertificateLKey. For more information, see the WinCC OA BACnet help.