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+# Requirements
+
+* Python 3.9
+* Set up virtual env
+
+    % python3.9 -m venv caster_env
+    % source caster_env/bin/activate
+
+    % python3.9 -m pip install --upgrade pip
+    % pip install urwid pychromecast nest_asyncio
+
+# Debug flow
+
+In run terminal - redirect STDERR from caster to an output file:
+
+    % ./caster.py 2> ste
+
+In another terminal, monitor the output file:
+
+    % tail -f ste