[werk_ag]

Hi  
 You were right.
Conecting the SD0 pin to GND ,the address changes to 0x76. Now it works.

Thank you for your help.
regards

Is good to know that it is working now.

A little more on this matter from the BME280 datasheet from BOSH Sensortec

Pag 35.

Connecting SDO to GND results in slave address 1110110 (0x76); connection it to VDDIO results in slave address 1110111 (0x77), which is the same as
BMP280’s I²C address. The SDO pin cannot be left floating; if left floating, the I²C address will be undefined

If Adafruit is supplying their BME280 sensor with address 0x77 by default, as you can see by the text above, that isn't correct. 0x77 is the default address of te BMP280, which is a different type of sensor (ATM only).

Rgs.