ModemRouter LTE Huawei E5573 - With Tp-link TL-MR3420 disconnects after a few mi

Hello everyone,

Currently, I have such a problem to solve and I am running out of ideas and possibilities.
The situation looks like this:
Modem - Huawei E5573 Wi-Fi LTE Router - works as a modem, connects to the LTE network and is connected to TP-LINK ROUTER TL-MR3420 V2 GSM which it makes for a router. (it must be connected like this because I will not connect a LAN cable to Huawei)

Behavior of devices: after starting the router connects to the modem and accesses the Internet, after a short indefinite time (1-10 minutes) it loses connection with the modem and cannot get connected. After restarting one of the devices, the connection is re-established for a while. The router has already been replaced with a new one, and it is the same, the modem works without problems when connected to the computer.

In the attachment the log from the router, it is not very readable for me, except that it lost connection with the modem. The second such set of devices has been operating in a different location for several months without any problems. Any idea besides to replace or check on another modem? Is it a configuration issue?

I have already tested many types of settings, but I don't know what it depends on.

The first thing is that the Huawei E5573 is not on the list of compatible devices with MR3420 and the second thing is probably the power supply and performance of the USB port on TP-Link - 500mA and the Huawei with a weaker signal can probably download much more. Is the same effect with a full battery?

It crossed my mind, but I haven't had time to check it yet, there may be something in this topic because Huawei is mounted outside the building in an airtight box to catch the range, the distance to the router is 50 cm only through a thin wall of sheet metal and polystyrene. Cables should be of good quality. Since I will be able to check it in a few days, I will be happy to listen to other suggestions.

And what can you listen to, poor USB power supply, in addition a USB extension cable. Poor LTE signal, the modem needs a lot of electricity and trouble at its own request. It is known for a long time that the MR-3420v2 is not suitable for using modems / MiFi without additional power supply. Such a makeshift usually ends this way. If you need a LAN, it does not take MiFi, if the signal is weak, an external antenna is used for the selected band.

Unfortunately, I did not choose these devices, and now I regret it. So, in this case, what is the point of removing, for example, the battery so that Huawei does not take additional electricity to charge it? And will he want to work without batteries? Or is it possible to somehow turn off WIFI completely in Huaweiu to reduce power consumption? because I was browsing the menu but I didn't see such an option only disabling broadcast of the network name. Or maybe there are some solutions to additionally power such a modem without damaging the router?

You will not turn off the WiFi, you will not remove the battery. To power the MiFi router, you need additional power, eg an active USB HUB with a 2A power supply. In addition, an external antenna for the selected LTE band. The idea of the MR-3420v2 to support the E5573 is weak, in addition to the OFW. This works better on Gargoyle 1.6.

Thank you for your help, in fact the router was able to give from 100mA to 300mA and when I connected the modem to the computer it consumed 450mA. I used an active HUB and this problem seems to be solved, but recently on this router and on another I have encountered a situation that the router's DHCP assigns addresses from "space", e.g. 231.121.015.102 or 192.211.100.222 and the mask 255.255.0.0 does it mean that do you need to get rid of the router?