Android app connection problem after importing network from json file

RE: Android app connection problem after importing network from json file

Anaya — Tue, 17 Mar 2020 08:51:12 GMT

Thank you so much.Its working by setting incremental sequence number.

Thanks a lot.

RE: Android app connection problem after importing network from json file

Anaya — Tue, 17 Mar 2020 04:50:35 GMT

Ok Sir,

Thank you so much for suggesting an answer. I will check both the answers.

Thank you.

RE: Android app connection problem after importing network from json file

Aleksander Nowakowski — Mon, 16 Mar 2020 13:14:04 GMT

The other option that you have is to send more and more messages that will timeout, until you reach finally a new Seq number.

RE: Android app connection problem after importing network from json file

Aleksander Nowakowski — Mon, 16 Mar 2020 13:13:17 GMT

Hello!

The reason why you get timeouts is that the app after reinstalling is trying to send messages with Sequence number that was already used. In mesh it is required that Seq number always increases. Seq number isn't shared in the JSON file. In general, each control device should use a different Provisioner instance, with unique address. In your case, after importing, you should switch the provisioner to use a new Unicast Address, that hasn't been used before (as you're using the same device).

Keep in mind, that each mesh node has Replay Protection Count number, which is the maximum number of unicast addresses it can EVER receive message from. Messages received form new nodes, after the RPC is full, will be discarded. This is because it needs to remember last Seq number for all nodes that has received at least one message from, to protect from Replay Attacks.

If you'd use the mesh library, not only the sample app, you may increase the Seq number for the current provisioner programatically.

RE: Android app connection problem after importing network from json file

Joakim Jakobsen — Mon, 16 Mar 2020 09:47:19 GMT

Thanks for checking!

I've forwarded your question to our nRF Mesh developers. They might have some suggestions for you.
I'll get back to you when I have more information from them.

Best regards,
Joakim

RE: Android app connection problem after importing network from json file

Anaya — Fri, 13 Mar 2020 12:47:50 GMT

Thanks for getting back.

By disabling automatic connection and manually selecting the given node as a proxy node. ->

I have already checked it by manually selecting the given node.

It gets connected, but while Read state or On-OFF operation it gives Operation Time Out error.

Please suggest the solution.

Thank you.

Regards,

Anaya

RE: Android app connection problem after importing network from json file

Joakim Jakobsen — Fri, 13 Mar 2020 11:31:10 GMT

Hi,

I'll forward this question to our developers of the nRF Mesh app. I haven't seen this before.

Can you try to manually connect to the node you want to control?
By disabling automatic connection and manually selecting the given node as a proxy node.

Best regards,
Joakim

RE: Android app connection problem after importing network from json file

Anaya — Fri, 13 Mar 2020 07:57:55 GMT

Hello,

I want to solve this issue. Is it possible?

Have you checked the issue?

RE: Android app connection problem after importing network from json file

Anaya — Wed, 11 Mar 2020 13:43:03 GMT

Good evening Sir,

Ok Sir. I will explain the case :

nRF Mesh App Version : 2.1.4

Android Version : 7.0

Phone Model : honor MediaPad T3, Model Number : KOB-L09

nRF5 SDK for Mesh Version: 4.0.0

Information about network :

1. I have created a mesh network where I have configured 2 nodes say A and B.

2. on A node I have 2 on-off servers and set publication address 0x0001 and 0x0002. The lamp operates ok on hardware.

3. on B node I have 2 on-off servers and set publication address 0x0003 and 0x0004. The lamp operates ok on hardware.

4. Then I exported network to a json file.

5. Then reinstalled the app and imported the network from json file.

6. I got the configured network. Then I connected to network.

7. Then I tried to Read State of any Lamp then I got operation time out error, also I got same error while ON/OFF lamp.

8. I need to solve this problem.

Kindly suggest the solution.

Regards!

RE: Android app connection problem after importing network from json file

Joakim Jakobsen — Wed, 11 Mar 2020 13:22:46 GMT

Could you please provide some more information about your issue.

What version of the nRF Mesh app are you using?
Which version of the nRF5 SDK for Mesh are you working with?
Information about your network; number of nodes etc.
What phone model and OS version?

The more information you can add, the easier it will be for us to support you.

Best regards,
Joakim