I think we need an example from of how can we communicate with DX30 from Xamarin Forms. I have right now a TC65 that is paired to DX30 but we don't know how could it work with Xamarin Forms. Before this, we could communicate DX30 with a MC65 with Windows Mobile 6.5 and extract information from a vending machine. But now we are kind of lost. Can zebra put some example of how can it work?

Thank you!

I have a Dex cable into my window 10 and it works well when using another app with a special cradle to talk to the Store Front

I use a port sniffer and i see the bits sent and received throught the port.

I disconnect the cradle and connect the DX30.

I connect to it using a bluetooth connection on my custom Android App.

However, when I sent data, the store still gives me the unexpected control error and the sniffer shows nothing....

Hi Fred / Glenn.
On a related topic -- DEX testing for Android using a PC -- needs a DEX "Test Jack" connector that would be the logical opposite side of the Serial IO that would be considered the STORE endpoint jack. The DEX "Test Jack" Pinout is Tip-Ring-Sleeve -- to D9 Pin 3, Pin 2, and Pin 5.  (3-wire Pseudo Null-Modem - No Handshaking)

If you wanted to test any Android and a PC with a DX30 -- this worked for me:
*** snip ***
The SDK for the DX30 in non-Zebra modes -- is just the Bluetooth RFCOMM APIs from Android.
The SDK for BT Pairing -- I leave as an excercise for the BT App Developer to figure out pairing automation -- but the Barcode for the BT Mac address is only CODE39 and could be captured using a Camera barcode scan facility.

The RFCOMM API's that work you can suggest the Open Source from Blue Term found here:
GMS Play Store: https://play.google.com/store/apps/details?id=es.pymasde.blueterm&h…
Open Source : http://pymasde.es/blueterm/
This would be sufficient to allow a moderate developer on Android Studio / Linux Android development to comprehend how to connect serial data to/from the DX30.

In my testing on Nexus 7 -- I had the DX30 Paired - Blue Term Connected to DX30.
DX30 was plugged into the DEX test JACK connected to my PC which was running the Desktop Version of PuTTY *(Minicom on Linux to the Serial Port, or TeraTerm for Windows - would work equally)*   The PuTTY Profile was connected to COM1: at 9600-8-N-1 (NO HANDSHAKING) {XON/XOFF as alternate}

On the Nexus I would see data when I type on the PC keyboard.
On the PC PuTTY Serial Session I would see data when I tapped keys on the Software KB on the Nexus 7 device)
*** /snip ***
Note: This is for testing purposes and the Data Exchanged is simply serial keyboard gibberish via a Serial Terminal Emulator and not DEX protocol data.

The DX30 is a pass thru product.  It needs to be connected to a store system to return data.

The DX30 uses the standard BT serial API commands to communicate.