Camera serial number not retrievable via device_info.module or device_info.property_dict for Daheng cameras

[JeremyKeusters]

Describe the Issue When using Basler cameras, it's possible to access the serial number of the camera either through:

• device_info.module.serial_number
• device_info.property_dict.serial_number

However, when using a Daheng camera (e.g. ME2P-900-13GC-P or MER2-503-23GC-P), these variables have the following values:

• device_info.module.serial_number: GenTL exception: Requested operation not implemented. (Message from the source: {-1003}{GetInfo:line[456]}{TLError:INFO ID 7 is out of range}) (ID: -1003)
• device_info.property_dict.serial_number: None

The only way of getting the value seems to be by going into device_info.parent.node_map.DeviceSerialNumber.value.

Sample Code I can show a piece of code that demonstrates the reported phenomenon:

• [X] Yes
• [ ] No

If yes, please provide a sample code: -> Can provide if really necessary

Expected Behavior I expected to be able to retrieve the camera serial number through the device_info.module or device_info.property_dict variables.

Configuration

• OS: ubuntu 18.04 LTS (Jetpack 4.6.1 [L4T 32.7.1])
• Python: 3.7
• Harvester: 1.4.2
• GenTL Producer: GxGVTL.cti
• Camera: ME2P-900-13GC-P & MER2-503-23GC-P

Reproducibility

This phenomenon can be stably reproduced:

• [X] Yes
• [ ] No.

Actions You Have Taken

• [X] I've read the Harvester FAQ page.
• [X] I've searched the GitHub repo for existing issues.