Understand the TRB145 capable of accepting POST/GET, however it only supports USB and 4G network. Is there any other way I can directly communicate with the gateway without using the USB cable?
As 4G does not allow direct communicate if we do not have VPN or DDNS. Is reverse SSH supported?
Can share what are the best way i can communicate with the gateway if we don’t use USB cable (Windows PC is needed).
It is possible, but it is dedicated to serial utilities. If you want to communicate via standard TCP/IP, I recommend getting another TRB series device with an Ethernet port.