Use SSD1306 7 pin OLED display to show BME280 data, time and publish with MQTT via Wifi 

this video shows you a small esp8266 project.
the display shows date, time, temperature, pressure, humidity and also transmits these data to a mqtt broker.
you can download the sketch here:
drive.google.c...
Pinning: The picture of the ssd1306 did not match exactly so I had to use paint to edit it a little bit. I'm pretty sure that not all connections are necessary or perfectly done. But in this configuration it just works.
drive.google.c...
Components:
ESP8266: Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module
BME280: BME280 Digital Sensor Temperature Humidity Atmospheric Pressure Sensor Module
SSD1306: 7Pin 0.96 Inch OLED Display 12864 SSD1306 SPI IIC Serial LCD Screen Module Geekcreit for Arduino