SmartThings + SimpliSafe + Google Assistant + Amcrest Cams Setup

At first glance, I don’t see any repeaters for either Z wave or Zigbee in your set up. That’s going to be important If you leave smartthings in the mix.

Read post 11 in the following thread, then go back up to the top and read the whole thing. (The topic title is a clickable link.)

Note, however, that simplisafe operates on its own protocol and cannot integrate directly with any of your SmartThings devices in either direction. You can see what other people have done in the following thread:

SimpliSafe Alarm Integration (cloud to cloud)