I can try that. I thought I had read that a restart wouldn’t power cycle the port or maybe I had tried that last time and the only way I got it to work again was to cut power to the device by physically unplugging it from the router.
I tested this today and a scheduled reboot does not actually power cycle the USB port. My 4g modem (zte mf833v) never goes from blue flashing (connected) to red (disconnected) and attempt to reconnect back to blue flashing again. It just stays flashing blue the whole time. The router itself does reboot and I lose the WiFi connection until it loads back up again.
I used the reboot command in my SFT1200 (firmware v4.7.2), the USB recycle power when it reboot/restarts, and the USB connected iPhone drop the power and regain the power after a while.
Is this situation same as in your SFT1200?
No, I tried both the reboot directly and reboot on schedule and they always resulted in the connected 4g modem never showing an indication of it rebooting. The 4g modem stayed blue flashing (connected to the 4g network) and it never cycled back to orange like a true power cycle should produce. I have a zte mf833v connected up to it.
I connected an LED light to the USB port of SFT1200.
After entering the reboot command, the light will go out after a while, about 5 seconds later, it lights up again, indicating that the USB port is recycle physically powered.
I have also verified it with iPhone.
You can verify it in a similar way.
I guess I will need to provide a video showing that it doesn’t power cycle in my case. Will this forum allow me to post a video or should I provide a link when I have one?
Just a long shot here - but there wouldn't be a backup battery in this modem by any chance, would there?
No, but it’s good to ask and rule that out. It’s only connected to the router through USB. The router is hooked up to a battery though and gets its power through solar.
I just tried to upload a video and it won’t let me do that on this site.
I uploaded it to Google drive. Anyway, this is at the point of reboot. You can see the gl.inet router had rebooted (no lights) but the modem did not lose power (still blue flashing the entire time). The modem would turn orange when it’s still needing to connect and that what a power disruption would cause if the USB port actually lost power.
Interesting!
Have you got a light (or some sort of USB voltmeter) to put in the port as a double check?
It's intriguing how your device differs from the one @bruce tested - a hardware revision perhaps?
I realise this is irrelevant, but I just checked a BeryAX I have plugged in at the moment, and the USB port powers off for a few seconds upon reboot.
Just being curious...
I have the following for testing:
Non-remote
GL-SFT1200, firmware 4.3.24
GL-A1300, firmware 4.5.19
Remote
GL-MT1300, unknown firmware since I cannot connect to it.
I really need the remote location to have the ability to reset that modem on reboot or somehow remove the power to the USB port. I’d replace the router at the remote location if I could get either of the two that I have to power down the USB port during reboot.
I’m not sure where to find the hardware version on the device or the menus.
Not real sure that a light or any meter would produce anything different though. That modem would change colors if power ever got interrupted on the USB port as it would have to re-register on the cellular network (change to orange). As the video shows, it never stops blinking blue and that means it’s still connected to cellular the entire time.
I have the following for testing:
Non-remote
GL-SFT1200, firmware 4.3.24
GL-A1300, firmware 4.5.19
Remote
GL-MT1300, unknown firmware since I cannot connect to it.
I really need the remote location to have the ability to reset that modem on reboot or somehow remove the power to the USB port. I’d replace the router at the remote location if I could get either of the two that I have to power down the USB port during reboot.
I’m not sure where to find the hardware version on the device or the menus.
Not real sure that a light or any meter would produce anything different though. That modem would change colors if power ever got interrupted on the USB port as it would have to re-register on the cellular network (change to orange). As the video shows, it never stops blinking blue and that means it’s still connected to cellular the entire time.
I don't know how to find the hardware version either, maybe only GL-Inet can find out through the device serial number.
My voltmeter suggestion was just in case somehow the modem was keeping itself up through some mysterious process (big internal capacitor maybe?) unlikely, I know.
This certainly is an interesting issue, and I can't wait to find out the result!
It will be figured out eventually, I'm sure.
Good luck with it!
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Thanks, I do appreciate your input and checking your device as well. It is weird but maybe there is just enough power at the USB to somehow to keep that modem going but not sure why it would be different for Bruce and you.
No worries, I'm a retired electrical engineer and these sorts of problems really spark (no pun intended) my interest!
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If you remove the power supply does the modem poweroff immediately or it keep flashing for some seconds?
It shuts down along with the router. No extra time period for the modem or router in terms of power then.
I’m headed over to the remote site today and will put it on a weekly reboot schedule and see if that changes anything but based on my testing at home… I really don’t think this is going to do anything.
Previously it had no reboot schedule on it.
I performed 3 reboots. Blue flashing light never came off for the modem. In the router page it shows “connecting” the whole time and never actually connects. Tried “abort” button and then connect button but then it just says connecting.
I removed the USB cable then plugged it back in and then the modem changed to orange then eventually blue flashing (connected). Then looked at router web page and it’s connected. Now all my remote devices can connect again.
Obviously a reboot does not completely power down the USB port. I’ve put it on a weekly reboot schedule anyway but that doesn’t seem like it’s going to be a true fix.