Can Wi-Fi fail over to a hotspot automatically?
That is the goal I am working toward. When Wi-Fi drops, I want my machine to move to a hotspot by itself and come back when Wi-Fi recovers, with no clicks from me. I have not reached it yet. This page describes where the setup stands, including a test that went badly, because the test result is the most useful fact I have.
The point of the setup is that I should not have to notice the outage, let alone fix it. A connection that needs me to step in has not been automated.
What is the setup today?
The setup has two sides. One handles the switching: moving the machine from Wi-Fi to the hotspot and back. The other is a monitor that runs apart from the switching logic and can report when contact goes missing. An independent recovery worker and a notification worker are installed alongside it.
The reason for the split is that the part that switches networks should not be the only part that knows the network is gone. If that code hangs or fails quietly, nothing would say so. A second worker that watches the connection on its own can tell me. It catches one kind of silent failure. It does not mean every failure will show up, and I do not claim it does.
What did the first physical test show?
The first physical test left me offline for about nine minutes. The handover was supposed to happen without me, and for about nine minutes it did not. I count that run as a failure.
I have revised the system since. The revised version has not yet been through enough physical tests to say whether the nine minutes are gone. One good run would not settle it either, which is the reason for the definition of done below.
What would make me call it done?
Real outages cost close to zero minutes, and handovers finish without me touching anything. I want to see that across several drops, not one good run.
Three numbers tell me whether I am there: time without connectivity per outage, time from detection to recovery, and the count of unattended handovers that succeeded. Today I have the first only as that single nine-minute test. Collecting the other two is what the monitor is for.
How would you test a failover setup like this?
This part is general advice, not a record of what I did. The test has to be physical, because a simulated drop can pass while the real thing fails. Turn Wi-Fi off, or move out of range, and start a timer. Stop the timer when traffic flows again over the hotspot without you touching anything. Then bring Wi-Fi back and time the return in the same way.
Repeat that several times, at different moments. A handover that works when the machine is idle may fail when it is busy, and you only find that out by trying both.
Why publish an unfinished setup?
A failover that works once proves little, and a write-up that only shows the good run would hide the interesting part. The nine minutes tell you what the first version cost, and the definition of done tells you what I will hold the next version to. When I have several physical drops with the revised system, I will update this page with the numbers, whichever way they go.
Where does it break?
Beyond the nine-minute run, I do not know yet. The monitor reduces one class of silent failure. Other failures, such as a hotspot that is switched on but has no mobile signal, are outside what I have verified. If you build something similar, list the ways the second network can be unavailable and test each one.
Who is this for?
It fits people whose work stops when the link drops, such as video calls and long-running agent sessions, and who work where Wi-Fi is unreliable. It is also an engineering task. It takes comfort with network settings and small background workers, so it does not suit someone who wants a one-click fix.
How can I start in 15 minutes?
Do not build anything yet. Measure first. Pull Wi-Fi on a normal working day and time how long it takes you to notice, switch to a hotspot by hand and be productive again. That number is your baseline, and it is the one the automation has to beat.
Then write down your own definition of done in minutes and in number of unattended handovers. Mine is close to zero minutes, across several drops. With a baseline and a target, the build has something to answer to.
Where does this fit in the series?
This is one of the more technical entries in the Compounding CEO playbook. The practice card is Make the hotspot take over on its own.
Frequently Asked Questions
How long was the first network failover test offline?
About nine minutes. That was the first physical test of the setup, and it is the reason I treat the failover as unfinished. Repeated physical handovers with the revised system are still being validated.
Why run a separate monitor next to the switching logic?
If the code that switches networks is the only thing that knows the connection is down, a fault in that code can fail silently. A separate worker that watches contact on its own can report when contact goes missing. It catches one kind of silent failure and does not guarantee that every failure will show up.
What counts as a successful failover?
Real outages cost close to zero minutes, and handovers to the hotspot and back finish without me touching anything. One good run is not enough. I want that result across several drops.
Which numbers should I track for a failover setup?
Time without connectivity, time from detection to recovery, and the number of unattended handovers that succeeded. Those three show whether the setup works in practice rather than only on a good day.
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