Add @property decorator to some method of Data class

circuitpython/code/main.py

@@ -115,7 +115,7 @@ class Data:
                 if not self.data[source] == None:
                     for d in self.data[source].items():
                         print("\t{0}: {1}".format(d[0], d[1]))
-
+    @property
     def json(self):
         """Serialize data to json-formatted string"""
         output = '{'
@@ -141,7 +141,8 @@ class Data:
         output = output + '}'
         return output
 
-    def atmo2rgb(self):
+    @property
+    def rgb(self):
         """Convert atmospheric data from BME280 sensor into NeoPixel color
          * RED => temperature : max = 35degC, min =10degC (range 25°C)
          * BLUE => humidity : max= 100%, mini=0%
@@ -299,11 +300,11 @@ while True:
         if print_data:
             data.show()
         if send_json_data:
-            rpi_uart.write(data.json())
+            rpi_uart.write(data.json)
         if backup_data:
             data.write_on_flash()
         if data_to_neopixel:
-            pixel[0] = data.atmo2rgb()
+            pixel[0] = data.rgb
 
         gc.collect()
         # micropython.mem_info(1)