Debug json : now valid compact JSON (RFC 4627)

circuitpython/code/main.py

@@ -117,14 +117,27 @@ class Data:
 
     def json(self):
         """Serialize data to json-formatted string"""
-        output = "{"
+        output = '{'
+        first_source = True
         for source in self.data.keys():
-            output = "".join((output, "'", source, "': \n"))
+            if first_source:
+                first_source = False
+                comma_src = ""
+            else:
+                comma_src = ","
+            output = '{}{}"{}":'.format(output, comma_src, source)
             if not self.data[source] == None:
+                output = output + '{'
+                first_data = True
                 for d in self.data[source].items():
-                    output = "".join((output, " {'{}': '{}'}}\n".format(d[0], d[1])))
-            output = output + "}, \n"
-        output = output + "}"
+                    if first_data:
+                        comma = ""
+                        first_data = False
+                    else:
+                        comma = ","
+                    output = '{}{}"{}":"{}"'.format(output, comma, d[0], d[1])
+            output = output + '}'
+        output = output + '}'
         return output
 
     def atmo2rgb(self):
@@ -279,7 +292,7 @@ while True:
         data.update()
         if print_data:
             data.show()
-            # print(data.json())
+            print(data.json())
         if backup_data:
             data.write_on_flash()
         if data_to_neopixel: