The TRB140 has a USB port that you can utilize in order to reach the device locally. Other options would be using the Remote access setup under System → Administration to reach the device remotely. This would work only with a public IP address though - TRB140 Administration - Teltonika Networks Wiki
You may also try out RMS, one of our Remote Management Systems to access the device remotely without the need of a public IP address and such: RMS - Teltonika Networks Wiki
I wan’t to supply internet connection through the LAN port of the TRB140, the internet connection is coming from a router with IP adress 192.168.1.1, is that possible?
If you want to supply an internet connection to the TRB via an Ethernet cable, all you have to do is simply plug it into the RJ45 port, and then follow this configuration example to set up the LAN port as WAN: LAN as WAN on TRB series - Teltonika Networks Wiki
For accessing the device (since the only LAN port will be occupied by the internet source), refer to my initial message.
Looking at the screenshot, it looks like you have an internet connection, but that, I assume is from the SIM card that you have inserted?
If you want to primarily use your WWAN interface as the internet source, I would suggest going to Network → WAN and drag the WAN interface be above the mob1a1s1 interface, more information here: TRB140 WAN - Teltonika Networks Wiki
Additionally, since TRBxxx devices don’t have failover functionality, your primary interface will be the one that the traffic goes through, however, both of them will be active. Once, let’s say, the WAN interface goes down and the mobile stays, the traffic will then go through the mobile.
Please try changing your LAN IP address to 192.168.2.1 (or any other that isn’t the 1.0 subnet) and try testing again. There currently seems to be a conflict.
This specific thread is in regard to a completely separate issue. For the next time, please create a new thread to ask any questions or for help.
Regarding the app you’ve provided, we’ve not tested it with any of our devices. However, if you wish, you may try testing it out with your Teltonika device to see if it functions as expected.