Summary:
The article notes that Cargas Energy will end support for Mobile Applications on Windows devices in June 2026 and provides steps to reset the COM port on Windows Toughpads when you encounter COM errors or cannot find COM1. It instructs you to show hidden devices in Device Manager, uninstall any USB serial ports (without deleting drivers), undock the Toughpad, copy and run the IgnoreSerialNo tool from the Mobile Master\Drivers and Fixes folder as Administrator to select FT232R/BM and write, then redock and set the serial port to COM1 via Port Settings → Advanced. For further help if COM1 still won’t appear, it links to an additional troubleshooting article.
End of Support for Windows Mobile Devices
As of June 2026, Cargas Energy will no longer support Mobile Applications on Windows Devices.
Please refer to the following for more information:
Issue / Question :
In Cargas Mobile Delivery you can set the COM port the device will use to communicate with the meter. Typically this is set to COM1 in the truck set up screen of Mobile Delivery. Please follow the steps below to reset you COM port when getting a COM error or you cannot find the correct COM1 port.
Environment:
- Old Mobile Delivery/New Mobile Delivery
- Windows Devices only (Toughpads)
Resolution / Answer:
-
Go to
Control Panel
>
Device Manager
>
Ports (COM & LPT).
- On the top menu of the device manager click, View.
- Once in View drop down select show hidden devices.
-
If there are any USB Serial Ports in the list, Right click the port and click
Uninstall. (Make sure you keep the check box
unchecked
that says delete driver software for this device).
-If there are no USB Serial Ports listed or it is grayed out, see the Cause/Notes section at the bottom of article - Make sure the Toughpad is not in the Tabcruzer/ undock the device
-
Navigate to
File Explorer>C:/drive>Mobile Master>Drivers and Fixes.
- If this directory and/or the IgnoreSerialNo file does not exist, you can download it directly here or find the attached file on this article.
- You will need to access this article on the device so you may download this onto the Tough pad
- Look for this in the downloads folder on the device
- Drag and drop the file into Mobile master folder in the C:/drive
-
Select the program
IgnoreSerialNo, right click and run as Administrator.
-
Click the Device Type, Select
FT232R/BM
(First on the List) than click
Write.
- Click Close and OK and redock the device .
- Navigate back to Control Panel > Device Manager > Ports.
-
Right Click the Serial Port and select
Settings > Port Settings > Advanced.
- Change the COM port number in the drop down to COM1 and click Ok.
Additional Info:
- For further troubleshooting if you are still unable to connect to your meter please refer to: What to do When COM Port 1 is Missing from Truck Setup in Old Mobile Delivery?
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