title: How to identify 2 of the same type camera gphoto2
body: <p>Suppose I have 2 of the exact same type of camera, how would I properly use one as opposed to the other if I don't know which port they're plugged into? </p>
  
  <p>I know you can select a camera by name, but they both have the same name. I know you can select by drive, but I can't know with certainty which port the user plugged the camera(s) into.</p>
  
  <p>That means I have to iterate over the cameras and select the right one based on the summary. Unfortunately, I can't tell that there is a static uniquely identifying property for a camera if it is of the same type as the other connected camera.</p>
  
  <p>If I type gphoto2 --camera-summary I get: </p>
  
  <pre><code>Camera summary:                                                                
  Manufacturer: Canon Inc.
  Model: Canon EOS Rebel T6i
    Version: 3-1.0.0
  Vendor Extension ID: 0xb (1.0)
  
  Capture Formats: JPEG
  Display Formats: Association/Directory, Script, DPOF, MS AVI, MS Wave, JPEG, CRW, Unknown(b103), Unknown(bf02), Defined Type, Unknown(b104), Unknown(b105), Unknown(b982)
  
  Device Capabilities:
      File Download, File Deletion, File Upload
      No Image Capture, No Open Capture, Canon EOS Capture, Canon EOS Shutter Button
      Canon Wifi support
  
  Storage Devices Summary:
  store_00020001:
      StorageDescription: SD
      VolumeLabel: None
      Storage Type: Removable RAM (memory card)
      Filesystemtype: Digital Camera Layout (DCIM)
      Access Capability: Read-Write
      Maximum Capability: 31902400512 (30424 MB)
      Free Space (Bytes): 21192966144 (20211 MB)
      Free Space (Images): -1
  
  Device Property Summary:
  Model ID(0xd049):(read only) (type=0x6) 2147484563
  Property 0xd402:(read only) (type=0xffff) 'Canon EOS Rebel T6i'
  Property 0xd407:(read only) (type=0x6) 1
  Property 0xd406:(readwrite) (type=0xffff) 'Unknown Initiator'
  Property 0xd303:(read only) (type=0x2) 1
  Battery Level(0x5001):(read only) (type=0x2) Enumeration [100,0,75,0,50] value: 100% (100)
  </code></pre>
  
  <p>Which doesn't include a property like Serial Number. </p>
  
  <p>I'd also tried gphoto2 --get-config serialnumber but got an odd result:</p>
  
  <pre><code>Label: Serial Number                                                           
  Type: TEXT
  Current: None
  </code></pre>
  
  <p>Any help would be awesome, thanks for reading!</p>