RPI: some more changes to properly throw and catch exceptions

tools/rpi/hoymiles/__init__.py

@@ -598,6 +598,9 @@ class InverterTransaction:
                 wait = True
         except TimeoutError:
             pass
+        except BufferError as e:
+            print(f'Buffer error {e}')
+            pass
 
         return wait
 

tools/rpi/hoymiles/__main__.py

@@ -86,13 +86,13 @@ def poll_inverter(inverter, do_init, retries=4):
                         dst=inverter_ser
                         )))
             response = None
-            try:
-                while com.rxtx():
+            while com.rxtx():
+                try:
                     response = com.get_payload()
                     payload_ttl = 0
-            except Exception as e_all:
-                print(f'Error while retrieving data: {e_all}')
-                pass
+                except Exception as e_all:
+                    print(f'Error while retrieving data: {e_all}')
+                    pass
 
         # Handle the response data if any
         if response:
@@ -324,3 +324,6 @@ if __name__ == '__main__':
 
     except KeyboardInterrupt:
         sys.exit()
+    except Exception as e:
+        print ('Exception catched: %s' % e)
+        raise

tools/rpi/hoymiles/outputs.py

@@ -265,7 +265,7 @@ class VzInverterOutput:
             r = self.session.get(url)
             if r.status_code != 200:
                 raise ValueError('Could not send request (%s)' % url)
-        except ConnectionError as e:
+        except requests.exceptions.ConnectionError as e:
             raise ValueError('Could not send request (%s)' % e)
 
 class VolkszaehlerOutputPlugin(OutputPluginFactory):
@@ -300,4 +300,7 @@ class VolkszaehlerOutputPlugin(OutputPluginFactory):
         serial = data["inverter_ser"]
         if serial in self.inverters:
             output = self.inverters[serial]
-            output.store_status(data, self.session)
+            try:
+                output.store_status(data, self.session)
+            except ValueError as e:
+                print('Could not send data to volkszaehler instance: %s' % e)