add source for rf103 (experimental)

owrx/command.py

@@ -76,4 +76,4 @@ class Option(CommandMapping):
 
 class Argument(CommandMapping):
     def map(self, value):
-        return value
+        return str(value)

owrx/feature.py

@@ -68,6 +68,7 @@ class FeatureDetector(object):
         "red_pitaya": ["soapy_connector", "soapy_red_pitaya"],
         "radioberry": ["soapy_connector", "soapy_radioberry"],
         "fcdpp": ["soapy_connector", "soapy_fcdpp"],
+        "rf103": ["rf103_sdr"],
         # optional features and their requirements
         "digital_voice_digiham": ["digiham", "sox"],
         "digital_voice_dsd": ["dsd", "sox", "digiham"],
@@ -492,3 +493,6 @@ class FeatureDetector(object):
         [OpenWebRX wiki](https://github.com/jketterl/openwebrx/wiki/DRM-demodulator-notes).
         """
         return self.command_is_runnable("dream --help", 0)
+
+    def has_rf103_sdr(self):
+        return self.command_is_runnable("rf103_sdr")

owrx/source/rf103.py

@@ -0,0 +1,15 @@
+from owrx.source.direct import DirectSource
+from owrx.command import Option
+import time
+
+
+class Rf103Source(DirectSource):
+    def getCommandMapper(self):
+        return super().getCommandMapper().setBase("rf103_sdr -i /home/jakob/workspace/RF103/rx888.img").setMappings({
+            "samp_rate": Option("-s"),
+            "center_freq": Option("-f"),
+            "attenuation": Option("-a"),
+        })
+
+    def sleepOnRestart(self):
+        time.sleep(1)