Zebra ZD420 LinkOS-Android Sdk Not Working Not Connect

i  need ZD420 model witch true SDK used i need java enough for me i try to connect Zebra ZD420 Printer devices with Bluetooth
android sdk LinkOS-Android Sdk but not success android i want just connect and i want print out hello world

code i m understand LinkOS-Android Sdk in not possible because this is model and sdk not full working

Steven Si
The Link-OS Multiplatform SDK

The Link-OS Multiplatform SDK for Android provides API for application to connect to Zebra printers through Bluetooth. The API is in Android Java. The SDK doesn't have JavaScript API for connecting Zebra printers over Bluetooth. But I believe you can call Java code through some sort of bridging in Android. Hope this helps.

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salih Hanifeoglu
Link-OS Multiplatform SDK for Android Not working i m sure 100%

i try to last 7 day just connect to ZD420 :(
i try with Link-OS Multiplatform SDK for Android and https://github.com/Zebra/LinkOS-Android-Samples/tree/ConnectivityDemo
i try to download github.com/Zebra/LinkOS-Android-Samples/tree/ConnectivityDemo and make debug on the my machine i get it this error

com.zebra.sdk.comm.ConnectionException: Could not connect to device: read failed, socket might closed or timeout, read ret: -1

what is the means code all your code nad not working and i m not alone this is see problem look at here

https://developer.zebra.com/thread/34639#comment-46205

if i m see problem how him see same problem i m need the clear result i m need to help really i m more lost to time

thank you

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salih Hanifeoglu
not see any person same problem?

hi dear just i m see this is problem?

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salih Hanifeoglu
now done working because this is printer just working on ble

Now i m solved this is printer just working on ble with library code

if any person need this is install it https://www.zebra.com/us/en/forms/card/multiplatform-sdk-card-printers-d... when
link_os_sdk folder look at for mac os Applications folder under ( Applications-> link_os_sdk )

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