As long as you are not exporting BACNET_BBMD_ADDRESS, it should work to
discover and read/write to the device. If you export BACNET_BBMD_ADDRESS, the
client tools will attempt to register as a foreign device with that target
address over the BACNET_BBMD_PORT with a BACNET_BBMD_TIMETOLIVE. So unless you
are needing to register as a foreign device, I wouldn't define any of those
BBMD environment variables.
Is there another service using the BACnet UDP port? What does netstat show?
$ netstat --numeric-ports --udp --listening
What does the bacwi -1 show? Can you post that info?
What is your PC IP address?
What is the IP address of your controller? If the controller is asking for an
IP address, does it get it? (i.e. is it configured for DHCP and there is no
DHCP server).
It's possible that your PC and the device are in exclusive subnets, but that
broadcast (discovery with WhoIs) somehow works.
Best Regards,
Steve
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
BACnet/IP uses, by default, port 47808 (0xBAC0). If another program or
application is using BACnet/IP, then netstat would show there is a listener at
port 47808:
udp 0 0 0.0.0.0:47808 0.0.0.0:*
udp 25111 0 0.0.0.0:47808 0.0.0.0:*
And it does show a listener at port 47808. That means that bacepics, bacrp,
etc., will not be able to use port 47808 to read or write to devices since
another BACnet application uses port 47808. You will need to stop the other
application, or use Foreign Device Registration on another port to that
application if it supports BBMD.
Are you running ./bacserv 1234 in another shell? If so, exit that application.
Alternately, the bacserv application includes BBMD support, so you could just
use another port, and use the Foreign Device Registration built into the
client tools.
set the BBMD address my device that supports BBMD:
$ export BACNET_BBMD_ADDRESS= 192.168.200.17
set the bacnet-tools to use port 47809:
$ export BACNET_IP_PORT=47809
run the EPICS
$ ./bacepics 12
Best Regards,
Steve
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
BACnet/IP needs to have exclusive access to UDP port 47808, so no other
application can use that port. If there is another BACnet application or
service running on your PC using that port, the bacnet-tools will not work
correctly. The netstat results indicated that there was another application
running, so the tools will not work if netstat shows a listener at 47808.
Can you try using the latest version of the BACnet stack tools (currently
0.7.1)? There have been improvements since 0.6.0.
Best Regards,
Steve
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I have a similar issue where the port 47809 is used by controllers to communicate.
So i set BACNET_BBMD_PORT=47809.
For a reason I ignore, if i set BACNET_IP_PORT to anything else than 47809, nothing works. Maybe the controllers are not able to answer on a other port than the one they are configured ?
The problem I have is that the bacnet server running on this pc already uses UDP:47809 , so bacwi will not work until i kill the server application because the port is already reserved.
I red on a website that UDP port can be configured to be used by multiple application using SO_REUSEPORT option. Is that something you hear about?
Hello,
I'm trying to communicate with a real device, but I got a trouble.
Setting BACNET environment variables I can find my controller device with
./bacwi.
But with "./bacepics -v 12", I got "Error: Unable to bind to 12 after waiting
10 seconds.
Error: APDU Timeout! (11s)".
Because of the binding error I tried "./bacepics -t C0:A8:C8:11:BA:C0 12" and
again I got
"List of Objects in device 12:
{
{
Error: APDU Timeout! (10s)
}"
And more, in wireshark the only thing I can see is the controller looking for
a network router.
For while, I don't know what to do.
Please, I need help!
Thanks in advance,
Lara
Hi Lara,
I can get the "Error: Unable to bind to 123 after waiting 10 seconds." and
"Error: APDU Timeout! (11s)" if I use a Device ID that does not exist.
$ ./bacwi -1
Received I-Am Request from 18, MAC = 192.168.0.18.186.192
Received I-Am Request from 2401, MAC = 192.168.0.24.186.192
Received I-Am Request from 1234, MAC = 192.168.0.24.186.192
Received I-Am Request from 90, MAC = 192.168.0.18.186.192
;Device MAC SNET SADR APDU
;------- -------------------- ----- -------------------- ----
18 C0:A8:00:12:BA:C0 0 0 1476
2401 C0:A8:00:18:BA:C0 0 0 480
1234 C0:A8:00:18:BA:C0 26001 7F 50
90 C0:A8:00:12:BA:C0 4 07 128
;
; Total Devices: 4
$ ./bacepics -v 123
Error: Unable to bind to 123 after waiting 10 seconds.
Error: APDU Timeout! (11s)
What did you set your BACNET_IFACE environment variable? I am using:
$ export BACNET_IFACE=eth0
Best Regards,
Steve
Hi Steve,
Thank you for your reply.
And... Yes, I am using eth0 interface.
I can bind the device but a can't read the properities yet.
At another forum post, you've talked about firewall and NAT.
I am using a cross cable to link my PC with the controller.
So NAT isn't a problem and I disabled the firewall.
I am a little lost about what to do now to solve this.
Do you have an idea?
Thank you in advance,
Lara
Hello Steve,
One more thing...
I am setting the environment variables
BACNET_APDU_TIMEOUT=12000,
BACNET_IFACE=eth0,
BACNET_IP_PORT=47808,
BACNET_BBMD_PORT=47808,
BACNET_BBMD_TIMETOLIVE=120000
and exporting them.
But in wireshark I can't see my PC traffic at eth0. Just the controller asking
for IP.
And I got error trying to read the properities either of the controller or of
a virtual device using ./bin/bacepics.
What am I doing wrong?
Thanks,
Lara
Hi Lara,
As long as you are not exporting BACNET_BBMD_ADDRESS, it should work to
discover and read/write to the device. If you export BACNET_BBMD_ADDRESS, the
client tools will attempt to register as a foreign device with that target
address over the BACNET_BBMD_PORT with a BACNET_BBMD_TIMETOLIVE. So unless you
are needing to register as a foreign device, I wouldn't define any of those
BBMD environment variables.
Is there another service using the BACnet UDP port? What does netstat show?
$ netstat --numeric-ports --udp --listening
What does the bacwi -1 show? Can you post that info?
What is your PC IP address?
What is the IP address of your controller? If the controller is asking for an
IP address, does it get it? (i.e. is it configured for DHCP and there is no
DHCP server).
It's possible that your PC and the device are in exclusive subnets, but that
broadcast (discovery with WhoIs) somehow works.
Best Regards,
Steve
Hi Steve,
Just to show you what I got:
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0/bin$ ./bacwi -1
BACNET_APDU_TIMEOUT=12000
Received I-Am Request from 1234, MAC = 172.10.10.69.186.192
Received I-Am Request from 12, MAC = 192.168.200.17.186.192
;Device MAC SNET SADR APDU
;------- -------------------- ----- -------------------- ----
1234 AC:0A:0A:45:BA:C0 0 0 1476
12 C0:A8:C8:11:BA:C0 0 0 480
;
; Total Devices: 2
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0/bin$ ./bacepics -v 12
BACNET_APDU_TIMEOUT=12000
List of Objects in device 12:
{
{
Error: APDU Timeout! (37s)
}
Hi again Steve,
Now, the controller and my PC are in the office network.
I set the BBMD and exported it with the IPv4 of the eth0 (172.10.10.46).
Now, I can see some traffic in wireshark.
And I got this:
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0/bin$ ./bacwi -1
BACNET_APDU_TIMEOUT=12000
Registering with BBMD at 172.10.10.46:47808 for 65535 seconds
Received I-Am Request from 1234, MAC = 172.10.10.46.186.192
Received I-Am Request from 12, MAC = 192.168.200.17.186.192
;Device MAC SNET SADR APDU
;------- -------------------- ----- -------------------- ----
1234 AC:0A:0A:2E:BA:C0 0 0 1476
12 C0:A8:C8:11:BA:C0 0 0 480
;
; Total Devices: 2
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0/bin$ ./bacepics -v 12
BACNET_APDU_TIMEOUT=12000
Registering with BBMD at 172.10.10.46:47808 for 65535 seconds
List of Objects in device 12:
{
{
Error: APDU Timeout! (37s)
}
The controller got the IP 192.168.200.17.
But I am little lost with the ($ netstat --numeric-ports --udp --listening)
answer
Proto Recv-Q Send-Q Endereço Local Endereço Remoto Estado
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 0.0.0.0:46698 0.0.0.0:*
udp 0 0 0.0.0.0:47808 0.0.0.0:*
udp 25111 0 0.0.0.0:47808 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp6 0 0 :::58313 :::*
udp6 0 0 :::5353 :::*
Thank you in advance,
Lara
Hi Lara,
BACnet/IP uses, by default, port 47808 (0xBAC0). If another program or
application is using BACnet/IP, then netstat would show there is a listener at
port 47808:
udp 0 0 0.0.0.0:47808 0.0.0.0:*
udp 25111 0 0.0.0.0:47808 0.0.0.0:*
And it does show a listener at port 47808. That means that bacepics, bacrp,
etc., will not be able to use port 47808 to read or write to devices since
another BACnet application uses port 47808. You will need to stop the other
application, or use Foreign Device Registration on another port to that
application if it supports BBMD.
Are you running ./bacserv 1234 in another shell? If so, exit that application.
Alternately, the bacserv application includes BBMD support, so you could just
use another port, and use the Foreign Device Registration built into the
client tools.
set the BBMD address my device that supports BBMD:
$ export BACNET_BBMD_ADDRESS= 192.168.200.17
set the bacnet-tools to use port 47809:
$ export BACNET_IP_PORT=47809
run the EPICS
$ ./bacepics 12
Best Regards,
Steve
Hello again Steve,
Bad news. I tried, but without success.
I changed the IP port and the BBMD and they don't work. When I tried the who-
is command, there was no answer. Neither with the bacepics.
What do you think about it? What can I try?
The following is what I've got:
lara@lara:~$ export BACNET_IFACE=eth0
lara@lara:~$ export BACNET_BBMD_ADDRESS=192.168.200.17
lara@lara:~$ export BACNET_BBMD_TIMETOLIVE=120000
lara@lara:~$ export BACNET_APDU_TIMEOUT=120000
lara@lara:~$ export BACNET_BBMD_PORT=47809
lara@lara:~$ export BACNET_IP_PORT=47808
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ ./bin/bacwi -1
BACNET_APDU_TIMEOUT=120000
Registering with BBMD at 192.168.200.17:47809 for 65535 seconds
^Z
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ export BACNET_IP_PORT=47809
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ export BACNET_BBMD_PORT=47808
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ ./bin/bacwi -1
BACNET_APDU_TIMEOUT=120000
Registering with BBMD at 192.168.200.17:47808 for 65535 seconds
;Device MAC SNET SADR APDU
;------- -------------------- ----- -------------------- ----
;
; Total Devices: 0
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ export
BACNET_BBMD_ADDRESS=172.10.10..46
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ ./bin/bacwi
-1BACNET_APDU_TIMEOUT=120000
;Device MAC SNET SADR APDU
;------- -------------------- ----- -------------------- ----
;
; Total Devices: 0
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ export BACNET_IP_PORT=47808
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ ./bin/bacwi -1
BACNET_APDU_TIMEOUT=120000
Received I-Am Request from 1234, MAC = 172.10.10.69.186.192
Received I-Am Request from 12, MAC = 192.168.200.17.186.192
;Device MAC SNET SADR APDU
;------- -------------------- ----- -------------------- ----
1234 AC:0A:0A:45:BA:C0 0 0 1476
12 C0:A8:C8:11:BA:C0 0 0 480
;
; Total Devices: 2
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ export BACNET_IP_PORT=47809
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ export
BACNET_BBMD_ADDRESS=192.168.200.17
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ ./bin/bacepics 12
BACNET_APDU_TIMEOUT=120000
Registering with BBMD at 192.168.200.17:47808 for 65535 seconds
Error: Unable to bind to 12 after waiting 163 seconds.
Error: APDU Timeout! (164s)
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$ ./bin/bacepics -t C0:A8:C8:11:BA:C0
12
BACNET_APDU_TIMEOUT=120000
Registering with BBMD at 192.168.200.17:47808 for 65535 seconds
List of Objects in device 12:
{
{
Error: APDU Timeout! (163s)
}
lara@lara:~/Ubuntu One/bacnet-stack-0.6.0$
So, with BBMD at my PC IP 172.10.10.46 and with IP PORT at 47808 is the only
way I can find the devices.
Another issue, in wireshark the object identifier is: device, 100. I was
waiting for 12. There's something wrong on it?
Thank you very much in advance,
Lara
Sorry Steve,
There is no problem with the identifier.
There is another device of the same vendor on the net.
The controller is the device 12!
Hi Lara,
BACnet/IP needs to have exclusive access to UDP port 47808, so no other
application can use that port. If there is another BACnet application or
service running on your PC using that port, the bacnet-tools will not work
correctly. The netstat results indicated that there was another application
running, so the tools will not work if netstat shows a listener at 47808.
Can you try using the latest version of the BACnet stack tools (currently
0.7.1)? There have been improvements since 0.6.0.
Best Regards,
Steve
Hi again Steve,
Thank you very much for your help.
I've to tell you that the fault was mine.
I was working with the controller without checking its net configuration.
The UDP/IP option was unenabled. So, I checked it with the Orcaview and now I
can read the properities.
One more,
Thanks,
Lara
PS: topic solved!
Hello Steeve,
I have a similar issue where the port 47809 is used by controllers to communicate.
So i set BACNET_BBMD_PORT=47809.
For a reason I ignore, if i set BACNET_IP_PORT to anything else than 47809, nothing works. Maybe the controllers are not able to answer on a other port than the one they are configured ?
The problem I have is that the bacnet server running on this pc already uses UDP:47809 , so bacwi will not work until i kill the server application because the port is already reserved.
I red on a website that UDP port can be configured to be used by multiple application using SO_REUSEPORT option. Is that something you hear about?
https://stackoverflow.com/questions/1694144/can-two-applications-listen-to-the-same-port
My last option is to use an other computer that have no bacnet server running on it... But this is not by easiest option !