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ChristianTremblay / BAC0

BAC0 - Library depending on BACpypes3 (Python 3) to build automation script for BACnet applications
GNU Lesser General Public License v3.0
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APDU Timeout #271

Closed WhiteSekiro closed 3 years ago

WhiteSekiro commented 3 years ago

Hello I have a Schneider device connected to a BAS Router When the router is connected to my freebox router, I can communicate with my device via read requests, whois, etcc.. I run my scripts from a home automation solution, and everything is fine

However, when I'm at work, when I want to use the same scripts, I get APDU Timeout errors

2021-04-12 14:14:58][DEBUG]: ################################### 2021-04-12 14:14:58][DEBUG]: # Read property

[2021-04-12 14:14:58][DEBUG]: ['12:1', 'analogInput', '18', 'presentValue']

2021-04-12 14:15:08][ERROR] : Send command to demon error : APDU Abort Reason : Timeout

The router is connected to a switch at my work This is the only difference I can notice If I use my script from PyCharm for example, the communications go through. But as soon as I switch to the home automation solution at work, I only get timeout errors

Can someone help me?

ChristianTremblay commented 3 years ago

It's a network issue probably. When you are not in the same subnet than the BACnet device, BAC0 won't see it. When you are away, on another subnet, you can register as a foreign device by targetting the BACnet router 

bacnet = BAC0.lite(ip='IPAddressOfYourPCOntheVPNNIC', 'bbmdAddress='IPofRemoteRouter:47808', bbmdTTL=900)
WhiteSekiro commented 3 years ago

Thanks for your reply. But i'm still in the same network. So, i don't understand where is the problem.

ChristianTremblay commented 3 years ago

Can you detail how your network is done ? Both the BAC0 script and the BACnet router (as you seem to connect to a MSTP device 12:1), must be on the same subnet. If not, BBMD must be used.