Sample Sketch (Arduino) for the BME280 & MAX44009 Breakout
Connections: Arduino -> Breakout VCC VCC GND GND TX DR RX CT
Make sure there are NO jumpers installed on the board (S0 or S1 to GND)
Baudrate should be set to 9600.
Product-URL: http://www.play-zone.ch/de/bme280-max44009-wetterstation-breakout-serial-i2c.html