The TL-MR3020 is not support AT commands function, so via the router, can't access to the modem via AT commands. Hope you could understand.

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Thank you for your information. Enjoy your inetrnet~

Hi, Use the TL-WPA4220KIT for example, you can refer to the link below to find the setup video, UG and QIG. https://www.tp-link.com/en/download/TL-WPA4220KIT.html

Our powerline device which sold on the market are compatible with each other. Because you have the TL-WPA4220KIT, so if you want to buy a wireless extender, I'm suggest the TL-WPA4220. If you just...

If the third light is not on, which means your TV or PC is not connected to the powerline device successfully, you can try to use differert ethernet port on the PLC adapter, use different port on the...