(1) Below: Simple Weather Monitor using BME 280 Temp&Humidity Sensor:
Wiring:
GND--->GND
Vcc----->3.3V
SDA---->SDA
SCL----->SCL
5V----->3.3V Regulator--->3.3V Bus
Below: Microbit Extension for BME 280:
ESP8266 (ESP 01):
GND------->GND
Vcc--------->3.3V
EN---------->3.3V
Tx----------->P1
RX----------->P0