Read Property from Bacnet Ethernet Device.

[SQ9MDD]

I'm asking the BACNET devices:

"request.pduDestination = Address(addr)"

If the address is in a Bacnet IP or Bacnet MS/TP network everything works. I ask for a device by its IP address or a pair of network/MAC, for example:

addr: "192.168.1.3" addr: "50019:5"

How can I ask for a Bacnet Ethernet device: BacnetDevice: 1100 BacNet ethernet network: 10001 BacMet MAC: 00-40-AE-01-32-B0

The BBMD (192.168.1.3) is a router to this BacnetEthernet network

I'm lost and I can't construct a correct address in query

Thanks for advice

[ChristianTremblay]

Try a Whois. If the device can be seen, you will get its address in the format you need to use.

Le dim. 27 sept. 2020 à 07:45, Rysiek Labus notifications@github.com a écrit :

I'm asking the BACNET devices:

"request.pduDestination = Address(addr)"

If the address is in a Bacnet IP or Bacnet MS/TP network everything works.

I ask for a device by its IP address or a pair of network/MAC, for example:

addr: "192.168.1.3"addr: "50019:5"

How can I ask for a Bacnet Ethernet device:

BacnetDevice: 1100BacNet ethernet network: 10001BacMet MAC: 00-40-AE-01-32-B0

The BBMD (192.168.1.3) is a router to this BacnetEthernet network

I'm lost and I can't construct a correct address in query

Thanks for advice

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[JoelBender]

There are two forms of Ethernet addresses, the one you would usually see if the device is a local station (you and the server are on the same BACnet Ethernet network):

>>> from bacpypes.pdu import Address
>>> Address("01:02:03:04:05:06")
<Address 0x010203040506>

But that's a mess when you try and add the network number in front:

>>> Address("1001:01:02:03:04:05:06")
ValueError: unrecognized format

So there an alternative "hex string" format that works for any MAC address length:

>>> Address("0x010203040506")
<Address 0x010203040506>
>>> Address("1001:0x010203040506")
<Address 1001:0x010203040506>

If you happen to be really an IBM mainframe applications programmer from the 70's you might recognize this, which also shows up in the standard every once in a while:

>>> Address("X'010203040506'")
<Address 0x010203040506>
>>> Address("1001:X'010203040506'")
<Address 1001:0x010203040506>

[SQ9MDD]

You are great guys!!!

i am trying: 10001:0x0040ae01329c wich is 10001:00:40:AE:01:32:9C

it's working! ('10001:0x0040ae01329c', 'analogValue:8', 'presentValue') 15.0

Many thanks again!