@TonyD We will do further analysis to locate this issue and try to figure it out. What is the led status of the TL-WA850RE? And what is the hardware and firmware version, which you can find on the...

@manos1234 Thanks for your updates. The TL-PA4010kit has the 100Mbps ports, theoretically, it can handle up to 100Mbps, while the actual speed will be lower due to the power line environment,...

@Dchelt What is the model number of your device? Is it TL-SG1005D？ TL-SG1005D is an unmanaged switch, which is plug and play and no configuration needed. What is the current network diagram? Good day.

@Danieldumboy Try to plug them into the wall sockets in the same room first, and then use the pair buton to pair them by pressing it for 1s. Or you can use the tpPLC utility to pair them:...

@shak_hy Cloning wifi settings is optional, if you want to use the same network name and password, you can use the utility to customize them manually. https://www.tp-link.com/support/faq/1611/ The...

@Michael_X Thanks for your reply. If need more help in the future, just let us know. Best regards.