Perspective client freezes when Android tablets roam from 2.4 GHz (Wi‑Fi 4) to 5 GHz (Wi‑Fi 5) – any known fix?

Ignition
1

Hi all,
We’re running Ignition 8.1.39:
60x Android 13 tablets (Zebra CC6000).
Project Mainly table / chart views; lots of live tag bindings (heavy WebSocket traffic).

Issue:
Some tablets that are far enough from one AP that it drops the 2.4 GHz signal and re‑associates on 5 GHz, the Perspective session stops updating:

  • UI is partially responsive (buttons work and switch to other views, but no data load).
  • No new tag values come through, but the browser doesn’t show a disconnect banner, therefore does not initiate reconnect
  • Only a full page reload restores the session; reconnect happens instantly after reload.
  • ping shows few second connection drop once in a while (when wifi reconnects), that's the moment when session freeze.
  • The few sessions in question are streamed over VPN, since the server is in different location. But the connection is stable, the connection problem is within the local closed network.

I'm working on the network separately to temporarily fix the biggest issue, but this makes me wonder, is there a way to prevent this from happening within Ignition?

Thank you

2

Get better wifi systems, in reality you are complaining about a tcp socket dropping when you change to a completely different network with a different MAC address on it. If you want seamless handoff, you need to have all one brand, all one frequency and all centrally managed wifi.

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3

We had a similar problem. We had enough access points, but they did not support roaming. Once our handheld connected to one AP, the user would walk into another area, but the device would still try to connect to the original AP instead of connecting to the one with best signal.

We upgraded AP hardware to fix this issue. It sounds like you need to install more APs and make sure they support roaming or mesh wifi.

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