So you are facing the same problem as one of my college is dealing. (He uses Etaler not HTM.core, but the problem is same.)
The simplest solution is to develop a server-client architecture; speaking HTTP/HTTPS, WebSockets, MQTT, IOTA or what not. Where your HTM app is the server and the the IoT device is the client. The client sends sensory data periodically to the server and the server performs anomaly detection upon receiving the data.
This should solve your needs. It should handle tens of devices sending data every minute (quite a high rate) should not be a problem.