Added wire.h to JSONdemo.ino
@@ -18,6 +18,7 @@ last revision November 2015
#include <WiFiClientSecure.h>
#include <ArduinoJson.h>
+#include <Wire.h>
// uncomment the next line if you have a 128x32 OLED on the I2C pins
//#define USE_OLED
