@JamesAndersonJr Not sure if the guest wifi can see the IoT network. You may want to try that. Otherwise, I think your option is to get some hardware that supports a vlan.

@Porknz If I google tp link c5 it appears I get a different router than if I select the blue router name in your post. I assume this is not a US router. The US router has a version 1.20 in the...

@Porknz Go to the TP Link website for your country and router. Select the support button, then the version number, then the firmware button.

@GoblueMichigan I would check to see if the ips is providing a static or dynamic address and what settings you have on the router. Sounds like you lost the ip address from the isp. To correct, you...

@Pablitox Look at travel routers. Some claim they can do it but I have not used one.

@Ajcasti be sure the mode is set correctly in the wifi settings. Try different channels. If that dors not work, I would open a support ticket and see if you can get it replaced.