Enabled ISM service.

owrx/modes.py

@@ -193,6 +193,7 @@ class Modes(object):
             underlying=["nfm"],
             bandpass=Bandpass(-24000, 24000),
             requirements=["ism"],
+            service=True,
             squelch=False
         ),
     ]

owrx/service/__init__.py

@@ -321,6 +321,9 @@ class ServiceHandler(SdrSourceEventClient):
         elif mod == "page":
             from csdr.chain.multimon import PageDemodulator
             return PageDemodulator(service=True)
+        elif mod == "ism":
+            from csdr.chain.rtl433 import Rtl433Demodulator
+            return Rtl433Demodulator(service=True)
 
         raise ValueError("unsupported service modulation: {}".format(mod))