Radio connection problems

[#1]

Hi, I have two Roberts internet radio's, a 93i and a 95i. Both are connected to wifi and both work individually from Spotify.

I want to control them both from the UNDOK app. The 93i works fine but UNDOK can't find the 95i.

The 93i is connected to 2.4GHz and the 95i to 5 GHz. Could this be the problem and if so can I make both frequencies visible to the App? or can I change the 95i to 2.4GHz? Both frequencies were assigned automatically on setup.

Any help appreciated. Thanks, Dave.

[#2]

Hi Dave,

A warm welcome to the forums.

Seems as though this might be a common issue.  A quick search found this - Internet radio no longer visible in UNDOCK : r/HomeNetworking

and this Undok no longer finding Roberts Stream 83i — Digital Spy

It ought not to matter which SSID the radios are connected to, they should appear equally on the LAN as two IP addresses.  Just to confirm, there is only the one WAP in your setup - the Plusnet router?

[#3]

Hi Townman, thanks for responding. I only have the one WAP, the Plusnet router.

[#4]

Can you see the connection details of both radios in the router admin screen?

If you shutdown the radio which the controller is connected to, does it then find the other?

[#5]

It ought not to matter which SSID the radios are connected to, they should appear equally on the LAN as two IP addresses

@Townman you're correct, it shouldn't but I think it does!. I suspect the app will only connect to devices on the same wifi band as that to to which the device running the app is connected. I've seen similar effects when casting to a TV from a laptop, it will only find the TV if connected to the same wifi band. Unfortunately this makes life difficult if you have a Hub 2 since you can't split the bands and so force devices onto the same band. Temporarily disabling 5ghz and connecting everything to 2.4ghz should prove whether that's the problem.

I've no idea what protocols these apps use to 'discover' devices but its obviously not simple IP. Having said that , my latest TV works perfectly even when using a wired connection with the laptop wireless!.

[#6]

@DaveSquibb 

Out of interest, have you checked that both radios have different MAC addresses?

I would expect for a well known brand like Roberts, that they do. However, I have had experience in the past where I had two devices with the same MAC address, (which in theory, shouldn't happen).

The devices in this case were cheap Android TV boxes. I bought one and was so happy with it that I bought a second one for another TV.

That's when the problems started: either of the boxes worked fine if only one of them was switched on, but if both were on at the same time, all sorts of weird problems started happening! It took me ages to work out what the problem was: these devices were exact clones - right down to having the same MAC addresses, which of course couldn't be changed.

I had to sell one of them in the end and bought a different brand one.

.