Hello,
The first thing to check is whether the RS232 settings (baud rate, number of data, stop bits, etc.) used are correct between the router and the meter. Could you also please specify if the router and the laptop used for data acquisition are within the same local area network or are you using WAN interface to access the device? You can try to test the setup in a local network using some serial monitor (for example Hercules for Windows). In WAN case, you might need to open a port for remote access in router‘s firewall. This can be done by adding a traffic rule in router‘s WebUI: Network -> Firewall -> Traffic Rules. Go to the bottom of the page, set the type to Open ports on router, enter the name of your choosing, select TCP protocol and enter the port number which you intend to use for data transfer. After pressing Add, an additional configuration window will be opened. Make sure it is enabled, source zone is selected as wan, enter source port which matches the configured number in your laptop, save & apply. Check if the correct port is set in the meter‘s software. If nothing helps, please, generate a toubleshoot file and send it to me. Go to the router‘s WebUI, System -> Administration -> Troubleshoot and press Download in Troubleshoot section.
Best regards,
Žygimantas