Maestro & SmartLink Freeze-on-Receive Question

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  • Updated 3 weeks ago
I am experiencing an odd problem and wonder if anyone else has had the same experience and may have found the cause.

When I connect to a radio using the Maestro over SmartLink, everything works FB for some amount of time until the receive audio quits and the spectrum display and waterfall either freezes or is replaced by a blank screen.  It may take only 3 or 10 minutes when using a WiFi LTE hotspot built into my Porsche Panamera or as much as an hour when connected to my office network via ethernet RJ45.  The length-of-time-to-failure can vary quite a bit, but it ALWAYS fails in the same way.  Transmit does not seem to be affected, only receive.

Conversely, when I am connected by ethernet via a local connection at my QTH, the Maestro continues to operate perfectly for periods exceeding a week.

The issue seems to have SmartLink as an item of interest, however, using an iPad or iPhone and SmartSDR for iOS does NOT have this problem.

Why would the Maestro over SmartLink have issues when the iOS app over SmartLink does not?
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Mike - W8MM

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Posted 4 weeks ago

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Mack McCormick, Elmer

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Mike,

SmartLink ONLY makes the initial handshake connection and then is completely removed from the equation once the client and radio are communicating.

The issue is 100% related to your network(s). Something is going into sleep mode or timing out. One way to test this since iOS app works is to use your phone as an Internet hotspot and connect the Maestro via the hotspot. It should behave exactly like the iOS app.

73,

Mack
W4AX
Alpha Team
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Michael Walker, Employee

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Hi Mike

On top of what Mack said, when you see the screen drop away and the data disappear it is due to a network interruption of some sort.

Mike
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Mike - W8MM

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Let's see if I have the situation understood.

The problem of internet interruption is the likely cause.  Does this mean the problem could be anywhere starting with the upload of the router/firewall at my home QTH through any internet transport facilities and even in the modems/hotspots receiving the internet traffic?  Seems likely.

As a logical progression, if the iOS app does not exhibit the problem, does that mean that the upload portion is not the problem?  Or, does it mean that the Maestro firmware may not have keep-alive functionality to maintain the internet stream that the iOS app contains?

Just trying to narrow down the possibilities.
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Mack McCormick, Elmer

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Mike,

As I suggested you should try using the Maestro connected to your phone as a hotspot. That eliminates the Maestro as a problem and narrows it down to networking between your client and radio.

Mack
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WX7Y

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OR try the Maestro on a friend or neighbor's home WiFi and see how it works, this will answer your question about SmartSDR or  " Does this mean the problem could be anywhere starting with the upload of the router/firewall at my home QTH". 

It's probably your cell phone service switch's to another cell site or changes IP's or just plane data drop out's from excessive traffic on it. 
The IPAD will do the same thing if your Network is what is dropping out just seems not to be as serious with the IPAD as it is with Maestro probably do to network buffering or something.

73
Bret
WX7Y


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Mike - W8MM

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Well, here's another data point:

When I use SmartSDR for iOS on my iPhone XS and connect to the internet via the WiFi hotspot (AT&T LTE) in my car, the iPhone experiences more data "QSB" than when I use the Verizon LTE built-in to the iPhone.  The native iPhone LTE by Verizon seems better from a data consistency aspect than AT&T. 

However, even though there are occasional data interruptions with blank spots in the waterfall and "hiccuping" audio episodes when using AT&T via the WiFi hotspot, the SmartSDR for iOS app NEVER freezes nor does it halt audio output the way the Maestro does.  I sincerely believe that there is an unfortunate difference in the way the Maestro firmware handles data drop-outs compared to SmartSDR for iOS.

So, to comply with requests, I will try using the Maestro with my iPhone as a WiFi hotspot to check for differences.  Logically, I don't expect to see a meaningful difference.  I'll let you all know what I find out.
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Mike - W8MM

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OK, I tried out using my iPhone XS as a WiFi hotspot and used its Verizon LTE service.

The Maestro still freezes just like using the AT&T LTE WiFi hotspot built-in to the the car.

There is something very different in how the Maestro behaves vs. SmartSDR for iOS using the iPhone XS.