This sketch means to be run on a WeMos D1 Mini with OLED Shield
It connects to the topics from the mqtt broker used in http://bitluni.net/solar-powered-weather-station/
Uses the following (external) libraries:
- PubSubClient: https://pubsubclient.knolleary.net/
- Forked Adafruit SSD1306 library to support the 64x48 Display: https://github.com/mcauser/Adafruit_SSD1306/tree/esp8266-64x48