fix(label): Try another way to serialize

.gitignore

@@ -2,7 +2,7 @@
 # Edit at https://www.toptal.com/developers/gitignore?templates=macos,python,visualstudiocode
 
 # File generated by test server
-test.png
+test.*
 
 ### macOS ###
 # General

inventree_phomemo/phomemo_label.py

@@ -40,7 +40,7 @@ class PhomemoLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
         # Read settings
         ip_address = self.get_setting('IP_ADDRESS')
         port = int(self.get_setting('PORT'))
-        label_data = kwargs['label_instance']
+        label_data = kwargs['label_instance'].object_to_print
 
         # Send the label to the printer
         try:

inventree_phomemo/server.py

@@ -11,7 +11,7 @@ s.listen(1)
 while True:
     conn, addr = s.accept()
     print(addr)
-    printer = open('test.json', 'w')
+    printer = open('test.json', 'wb')
     while True:
         data = conn.recv(91000)
         print('data received')