Mysterious Clients

[SteveR]

My router is an Asus RT-AC3100. Recently we've added a lot of devices to our home network. Two new wireless clients have appeared. One is: audiocast the other is: espressif. I've been wondering what their source is. (smartphones apps?) I did spend some time looking at audiocast but didn't find anything. The Asus router seem unaffected by these unknown wireless clients. I just blocked these clients from accessing the internet. See if anything happens. Anyway to figure-out the source of these wireless clients?

 

[degrub]

Turn off all of your IOT devices and add them back one at a time until those names show up.

 

[SteveR]

Turn off all of your IOT devices and add them back one at a time until those names show up.

Already tried that with audiocast. Could not discern any underlying program (app).
Good news with espressif. I recently bought an internet radio. It stopped working when I blocked espressif from accessing internet right after my first post. Internet radio back to working now.