This sketch configures the BME280 to read all measurements. The sketch also displays the BME280's physical memory and what the driver perceives the calibration words to be.
//BMP280-----Arduino //VDD ----> 3.3V //GND ----> GND //SDA ----> PIN20 (arduino mega) //SCL ----> PIN21 (arduino mega) //SDO ----> GND (slave address 0x76) //CS ----> VDD (HIGH for I2C) //VDDIO ----> VDD