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4G LTE USB Modem Only Works Once Per Boot
Posted: Wed Aug 26, 2020 10:14 pm
by neutronlaser
I'm using a Huawei E3372 USB modem with my HAP AC2 on the latest version 7 beta.
I find that if the USB stick is removed and plugged back in, I need to reboot the router before it appears in the USB section of System -> Resources. I've tried the USB Power Reset and it does not make a difference.
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Wed Oct 28, 2020 4:29 pm
by Xand
Hi, I am also using hAP ac^2 7.1b2, but with 3272 (hilink). After several days of AP's uptime, PCs show that wifi does not have internet.
I tried to turn off/on LTE interface - it does not help.
After USB power reset, LTE interface disappears and only reboot restores it.
So far it is not clear what is causing it
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Wed Oct 28, 2020 4:46 pm
by mbovenka
Just tried it with my E3372h-320 (connected to a CCR1036-8G-2S+ running 7.1b1). Both unplugging it and a power reset work for me; the stick comes back afterwards.
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Mon Mar 29, 2021 5:19 am
by Xand
We are at Beta 5, but issue is still not fixed!
Whether it is modem E3272 or android phone - it only works once per boot on hAP ac^2
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Mon Mar 29, 2021 9:32 pm
by SiB
And more technical... what is after boot ?
dhcp-client not work ?
lte1 exist ?
resources > usb still detect modem ?
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Thu Apr 08, 2021 10:38 am
by SiB
Anyone give deatils what happends when you cannot use internet ?
You know that logs are for some purpose ?
This topic is... reboot fix and we not give any info.
Write to
support@mikrotik.com - help.mikrotik.com - this way can help you if you want be help and give feedback
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Sat Apr 24, 2021 1:15 am
by wiresnarg
Apart from inspecting logs etc. consider hardware issues too.
LTE USB sticks are known for USB power issues, which is why e.g. those
https://www.olimex.com/Products/USB-Modules/USB-CAP/ exists. This solved some "weird" behaviour of USB LTE sticks for me in the past.
Re: 4G LTE USB Modem Only Works Once Per Boot
Posted: Sat Apr 24, 2021 1:30 am
by rextended
7 is beta, try 6.48.2
hAP ac² USB support max 1A (of peak?) or 5W (5V*1A)
https://www.manualslib.com/manual/13366 ... ml?page=10
Huawei E3372 USB want 2,5W to work (500mV@5A) (3,5W of peak???)
The 3.5W max include power used from SIM?
3,5W > 5W
Someone lie, if the problem is the power...