thingsboard
[BUG] BACNET Connector: something broke from Version 3.7.8 to 3.8.0
Connector name (If bug in the some connector): BACNET Connector
Describe the bug When I use thingsboard gateway 3.7.8, my bacnet connector to multiple devices is working, when using 3.8.0 it isn't. Most of the connected BACNET devices are working in 3.8.0. It is just one which does not deliver any datapoints anymore.
Steps to Reproduce Steps to reproduce the behavior:
- using BACNET config in 3.7.8 all BACNET devices work
- updating to gateway to 3.8.0
- suddenly one device is not connecting and delivering datapoints
Versions (please complete the following information):
- OS: Debian 12
- Thingsboard IoT Gateway version 3.7.8 / 3.8.0
- Python version 3.11.2
{
"application": {
"objectName": "BACNET",
"host": "XX.XX.XX.XX",
"port": "47808",
"objectIdentifier": 599,
"vendorIdentifier": 15,
"maxApduLengthAccepted": 1476,
"segmentationSupported": "segmentedBoth",
"networkNumber": 5,
"deviceDiscoveryTimeoutInSec": 5
},
"devices": [
{
"altResponsesAddresses": [],
"reportStrategy": {
"type": "ON_CHANGE_OR_REPORT_PERIOD",
"reportPeriod": 900000
},
"host": "XX.XX.XX.XX",
"port": 47808,
"deviceInfo": {
"deviceNameExpression": "Schuetzenstraße 48",
"deviceNameExpressionSource": "constant",
"deviceProfileExpressionSource": "constant",
"deviceProfileExpression": "default"
},
"pollPeriod": 60000,
"timeseries": "*",
"attributes": [],
"attributeUpdates": [],
"serverSideRpc": []
},
{
"altResponsesAddresses": [],
"reportStrategy": {
"type": "ON_CHANGE_OR_REPORT_PERIOD",
"reportPeriod": 900000
},
"host": "XX.XX.XX.XX",
"port": 47808,
"deviceInfo": {
"deviceNameExpression": "Bundesstrasse 23",
"deviceNameExpressionSource": "constant",
"deviceProfileExpressionSource": "constant",
"deviceProfileExpression": "default"
},
"pollPeriod": 60000,
"timeseries": "*",
"attributes": [],
"attributeUpdates": [],
"serverSideRpc": []
},
{
"altResponsesAddresses": [],
"reportStrategy": {
"type": "ON_CHANGE_OR_REPORT_PERIOD",
"reportPeriod": 900000
},
"host": "XX.XX.XX.XX",
"port": 47808,
"deviceInfo": {
"deviceNameExpression": "Hotel Sailer",
"deviceNameExpressionSource": "constant",
"deviceProfileExpressionSource": "constant",
"deviceProfileExpression": "default"
},
"pollPeriod": 60000,
"timeseries": "*",
"attributes": [],
"attributeUpdates": [],
"serverSideRpc": []
},
{
"altResponsesAddresses": [],
"reportStrategy": {
"type": "ON_CHANGE_OR_REPORT_PERIOD",
"reportPeriod": 900000
},
"host": "XX.XX.XX.XX",
"port": 47808,
"deviceInfo": {
"deviceNameExpression": "Resselstrasse",
"deviceNameExpressionSource": "constant",
"deviceProfileExpressionSource": "constant",
"deviceProfileExpression": "default"
},
"pollPeriod": 60000,
"timeseries": "*",
"attributes": [],
"attributeUpdates": [],
"serverSideRpc": []
},
{
"altResponsesAddresses": [
"10.70.0.232"
],
"reportStrategy": {
"type": "ON_CHANGE_OR_REPORT_PERIOD",
"reportPeriod": 900000
},
"host": "XX.XX.XX.XX",
"port": 47808,
"deviceInfo": {
"deviceNameExpression": "Juffinger",
"deviceNameExpressionSource": "constant",
"deviceProfileExpressionSource": "constant",
"deviceProfileExpression": "Juffinger"
},
"pollPeriod": 10000,
"timeseries": "*",
"attributes": [],
"attributeUpdates": [],
"serverSideRpc": []
}
],
"name": "BACNET",
"id": "69ce3587-0a78-453c-98f1-d55768e67986",
"logLevel": "DEBUG",
"enableRemoteLogging": false,
"configVersion": "3.7.7"
}
Hi @hoffi085, thanks for your interest in ThingsBoard IoT Gateway! Which device from your configuration can't connect? Is it the last one? Are there any errors in the logs?
Hi, yes it is indeed the last device which is not delivering data. I tried to change the order, but that did not help. There is nothing unusual in the logs, exept some data convertion errors, which belong to the devices which work, like:
Dez 09 10:22:45 thingsboard-iot-gateway python3[3088500]: 2025-12-09 10:22:45.038 - |ERROR| - [bacnet_uplink_converter.py] - bacnet_uplink_converter - __convert_data - 90 - Error converting object with objectId: "trend-log,3000587", and propertyId: "present-value". Error: <bacpypes3.primitivedata.ErrorType object at 0x7f82501e94d0>
Dez 09 10:22:45 thingsboard-iot-gateway python3[3088500]: 2025-12-09 10:22:45.038 - |ERROR| - [bacnet_uplink_converter.py] - bacnet_uplink_converter - __convert_data - 90 - Error converting object with objectId: "trend-log,3000588", and propertyId: "present-value". Error: <bacpypes3.primitivedata.ErrorType object at 0x7f82501e8cd0>
Dez 09 10:22:45 thingsboard-iot-gateway python3[3088500]: 2025-12-09 10:22:45.038 - |ERROR| - [bacnet_uplink_converter.py] - bacnet_uplink_converter - __convert_data - 90 - Error converting object with objectId: "trend-log,3000589", and propertyId: "present-value". Error: <bacpypes3.primitivedata.ErrorType object at 0x7f82501e9050>
Dez 09 10:22:45 thingsboard-iot-gateway python3[3088500]: 2025-12-09 10:22:45.038 - |ERROR| - [bacnet_uplink_converter.py] - bacnet_uplink_converter - __convert_data - 90 - Error converting object with objectId: "trend-log,3000590", and propertyId: "present-value". Error: <bacpypes3.primitivedata.ErrorType object at 0x7f82501e9d50>
Dez 09 10:22:45 thingsboard-iot-gateway python3[3088500]: 2025-12-09 10:22:45.038 - |ERROR| - [bacnet_uplink_converter.py] - bacnet_uplink_converter - __convert_data - 90 - Error converting object with objectId: "trend-log,3000666", and propertyId: "present-value". Error: <bacpypes3.primitivedata.ErrorType object at 0x7f82501ebed0>
@hoffi085, could you try to use Wireshark to confirm whether the IAm response was sent or not by this device?
Hi, yes it seems that the 'who-Is' -> 'i-Am' is sent:
14 14.523670 XX.XX.0.232 XX.XX.0.93 BACnet-APDU 50 Unconfirmed-REQ who-Is
15 14.527180 XX.XX.0.93 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,500
16 14.528397 XX.XX.0.232 XX.XX.0.66 BACnet-APDU 50 Unconfirmed-REQ who-Is
17 14.533473 XX.XX.0.66 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,519
18 14.534911 XX.XX.0.232 XX.XX.0.99 BACnet-APDU 50 Unconfirmed-REQ who-Is
19 14.538603 XX.XX.0.99 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,502
20 14.539685 XX.XX.0.232 XX.XX.7.82 BACnet-APDU 50 Unconfirmed-REQ who-Is
21 14.545854 XX.XX.7.82 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,2200010
22 14.546907 XX.XX.0.232 XX.XX.7.146 BACnet-APDU 50 Unconfirmed-REQ who-Is
23 14.568198 XX.XX.7.146 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,500
@hoffi085, do you see the log 'Received APDU, from %s, trying to find device...', device_address where device_address is the problem device address (in your case 10.70.0.232)?
Hi,
yes I do see: Dez 10 17:14:58 thingsboard-iot-gateway python3[3257259]: 2025-12-10 17:14:58.810 - |INFO| - [bacnet_connector.py] - bacnet_connector - indication_callback - 306 - Received APDU, from XX.XX.7.146, trying to find device...
What I found out is, when I remove the device XX.XX.0.93 from the configuration, device XX.XX.7.146 works. Maybe this has to do with the same Object-ID? Both devices have ID 500:
14 14.523670 XX.XX.0.232 XX.XX.0.93 BACnet-APDU 50 Unconfirmed-REQ who-Is
15 14.527180 XX.XX.0.93 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,500
22 14.546907 XX.XX.0.232 XX.XX.7.146 BACnet-APDU 50 Unconfirmed-REQ who-Is
23 14.568198 XX.XX.7.146 XX.XX.0.232 BACnet-APDU 62 Unconfirmed-REQ i-Am device,500
@hoffi085 ok, I will try to reproduce this scenario and let you know about the result. Let's stay in touch.