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The USB-C DEX Cable is used by route drivers in the grocery and vending machine industries. It provides a way to connect a USB-C iPad to a vending machine or to a grocery store’s computer system for direct store delivery (DSD).

The USB-C DEX Cable is “Made for iPad” (MFI) certified.

  • C4-DEX
  • $79
  • 013964221688
  • One year


Serial Interface

  • Male DEX plug
  • Max Baud Rate:  115 Kbps


  • For use with all iOS devices with USB-C connector
  • Requires iOS 14 or later


  • Length  53″


If your Redpark cable is not working properly try these troubleshooting steps below. 

Power your iPhone OFF and then ON again. (Do not simply put the iPhone to sleep. Power it completely OFF and then ON.)

If the problem continues to exist…

Confirm that your iPhone/iPad detects the cable:

  • Connect your cable to the iPhone
  • Open the Settings app on your iPhone
  • Select “General” then select “About”
  • Scroll down the list. “DEX Cable” will appear near the bottom of the list if the cable is detected by iOS).

If the iPhone IS detecting the cable:

Check whatever app you are using to make sure that the communication settings (baud rate, parity, etc.)  are properly configured. Check with the app developer if you have questions about the proper configuration.

If the iPhone is detecting the cable and the communication settings are correct but you are still experiencing a problem — perhaps the cable has developed a short in its wiring.   If the cable is within the one year warranty please return the cable to Redpark to be tested.  

If the iPhone IS NOT detecting the cable:

  • Make sure the case on your iPhone is not preventing the cable from being fully inserted into the USB-C connector of your iPad.
  • Use a toothpick or safety pin to remove any debris that might have accumulated in the USB-C connector of your iPad.
  • Try the cable on a 2nd iPhone or iPad to see if you get the same results. If the cable works OK on the 2nd iOS device then it is likely that cable is good.  If the cable does not work on the 2nd iOS device and the cable is within the one year warranty please return the cable to Redpark to be tested. 

 If you choose to email Redpark for assistance, please email “”.


What apps are compatible with the DEX Cable?

Apps that are available now include eoTouch from Rutherford and Associates, DSD Manager from Integrasys, Vendmine from Vendwatch Telematics, and VIP Route Accounting from Vermont Information Processing.

Can I develop my own app?

Yes. Please download the Serial SDK from the Developers page. If you are interested in developing an Android app please contact Redpark.

What version of iOS is required?

iOS 14 or later

How can I tell if my iOS device recognizes the DEX Cable?

Open the “Settings” app on your iOS device. Select “General”, then “About”. If the cable is detected by the iPhone, “USB-C DEX Cable” will appear in the list.

How do I know what version of firmware the cable is using?

Once you have located the USB-C DEX Cable in the “Settings” App, select the USB-C DEX Cable to view its parameters.

Can I use the USB-C DEX Cable with an Android tablet?

Check with the developer of your Android app to see if their app supports the USB-C DEX cable. (If the app has not been revised to support our cable then the cable will not work with an Android tablet.)