No Smartthings Data After WiFi Change

I just replaced my modem and now I can’t find my Z-wave devices and others. I changed the WiFi name and password on my new WiFi to match my old WiFi to which Smartthings was connected. Any suggestions on what I can do to retrieve my Smartthings devices and data? Tx

1st make sure your hub is online and has a solid green light.

The hub has a blue flashing light. I tried unplugging it and plugging back in but it came back with the same flashing blue light.

That means the hub is not connected to the internet, and is the reason you are not seeing your devices.

If you have a v3 or Aeotec hub and you are using a WiFi connection try to use an Ethernet cable. If you are already using and Ethernet cable try a different cable.