[Unity, Hololens2] Spatial Anchor ID could not be imported from the Azure Spatial Anchors network.

Question

[Unity, Hololens2] Spatial Anchor ID could not be imported from the Azure Spatial Anchors network.

Min-Jae, Lee 36

Process.

[Hololens Player1] Move Model
[Hololens Player1] Click "Start Azure Session" Button
[Hololens Player1] Click "Create Azure Anchor" Button
[Hololens Player1] Click "Share Anchor ID to Network" Button
It runs well up to this Step.

But it doesn't work to bring up anchor id.

[Hololens Player2] Click "Get Anchor ID from Network" Button
At this stage, the anchor id part is empty.

António Sérgio Azevedo 7,671 Reputation points Microsoft Employee Moderator

2022-05-16T11:57:49.227+00:00

Hello @Min-Jae, Lee to help us troubleshoot, if you are following a specific tutorial can you share the link?

Thanks!
Min-Jae, Lee 36 Reputation points

2022-05-17T08:33:33.903+00:00

Thank you for your answer.

Below is the official guide for anchor sharing with hololens2,
https://learn.microsoft.com/en-us/learn/modules/azure-spatial-anchors-tutorials/

Below is a tutorial by a Japanese developer.
1.
https://qiita.com/ryuichi_07/items/1efb05e29d6aa98be2ef
2.
https://zenn.dev/iwaken71/articles/hololens-2022-2#%E3%82%B7%E3%83%BC%E3%83%B3%E3%81%AE%E6%BA%96%E5%82%99-(%E3%83%81%E3%83%A5%E3%83%BC%E3%83%88%E3%83%AA%E3%82%A2%E3%83%AB)

I'll be waiting for your answer. Thank you
clcheles 272 Reputation points Moderator

2022-05-19T10:16:51.747+00:00

Although I don't have the complete sample code, I believe that the issue resides in the second screen shot. Our learning module sample contains a hardcoded test IP server (167.99.111.15) to save/retrieve Anchors ID. You'll need to implement that webserver yourself.
Min-Jae, Lee 36 Reputation points

2022-05-20T07:53:00.057+00:00

Hi, clcheles, Thank you for reply.
Then should I save and load anchor data on the server I implemented, not on the AZURE server?
I used the sample code as it is, not my web server.
But when I share the anchor, I see the message "Current Azure anchor ID '...' shared successfully."(First screen shot)
And if I use my web server to share anchor data, why should I use Azure Spatial Anchor service?

Please explain to me the workflow of Azure Spatial Anchor service.

Answer accepted by question author

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António Sérgio Azevedo 7,671 Reputation points Microsoft Employee Moderator

2022-05-16T11:57:49.227+00:00

Hello @Min-Jae, Lee to help us troubleshoot, if you are following a specific tutorial can you share the link?

Thanks!
Min-Jae, Lee 36 Reputation points

2022-05-17T08:33:33.903+00:00

Thank you for your answer.

Below is the official guide for anchor sharing with hololens2,
https://learn.microsoft.com/en-us/learn/modules/azure-spatial-anchors-tutorials/

Below is a tutorial by a Japanese developer.
1.
https://qiita.com/ryuichi_07/items/1efb05e29d6aa98be2ef
2.
https://zenn.dev/iwaken71/articles/hololens-2022-2#%E3%82%B7%E3%83%BC%E3%83%B3%E3%81%AE%E6%BA%96%E5%82%99-(%E3%83%81%E3%83%A5%E3%83%BC%E3%83%88%E3%83%AA%E3%82%A2%E3%83%AB)

I'll be waiting for your answer. Thank you
clcheles 272 Reputation points Moderator

2022-05-19T10:16:51.747+00:00

Although I don't have the complete sample code, I believe that the issue resides in the second screen shot. Our learning module sample contains a hardcoded test IP server (167.99.111.15) to save/retrieve Anchors ID. You'll need to implement that webserver yourself.
Min-Jae, Lee 36 Reputation points

2022-05-20T07:53:00.057+00:00

Hi, clcheles, Thank you for reply.
Then should I save and load anchor data on the server I implemented, not on the AZURE server?
I used the sample code as it is, not my web server.
But when I share the anchor, I see the message "Current Azure anchor ID '...' shared successfully."(First screen shot)
And if I use my web server to share anchor data, why should I use Azure Spatial Anchor service?

Please explain to me the workflow of Azure Spatial Anchor service.

Answer 1

clcheles 272 Moderator

I believe that "Persist Azure Spatial Anchors between app sessions" title is not describing the scenario correctly. It should say "Persist Spatial Anchors between app sessions".
"Saving to disk" and "Saving to Network" implementations are not ready-to-use scripts in a production application. You should update them per your need.
CreateAnchor script contains 2 parts: 1 for creating a local anchor and 1 from uploading that anchor to Azure Spatial Anchors service.

SaveAzureAnchorIdToDisk script just grabs currentAzureAnchorID, which might be available or not, and saves it to a txt file. There isn't any check implemented, so even if it fails, you'll still see "Current azure anchor id.." text displayed. Same goes for "ShareAzureAnchorIdToNetwork"

ShareAzureAnchorIdToNetwork relies on an webserver that you need to build yourself to save and retrieve anchors, in case you don't want to use Azure Spatial Anchors service.
For the best results, I encourage you to use Azure Spatial Anchors for persistence and sharing.
You can read more about Azure Spatial Anchors here and use this tutorial and official Azure Spatial Anchors sample

António Sérgio Azevedo 7,671 Reputation points Microsoft Employee Moderator

2022-05-25T14:02:49.67+00:00
Hello @Min-Jae, Lee ,

Please share with us if you have any other questions related with your original post. Otherwise could you go ahead and mark the above as answer?

Thank you so much.

Remember:

Please accept an answer if correct. Original posters help the community find answers faster by identifying the correct answer. Here is how.
Min-Jae, Lee 36 Reputation points

2022-05-26T01:17:19.473+00:00

I thought the "ShareAzureAnchorIdToNetwork" method contained the ability to send anchor data to Microsoft's Azure server.
I found the cause of the problem with your help.
Thank you so much.
Have a nice day.
Min-Jae, Lee 36 Reputation points

2022-05-26T01:18:45.683+00:00

I accepted the answer. Thank you.

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[Unity, Hololens2] Spatial Anchor ID could not be imported from the Azure Spatial Anchors network.

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