BME280 I2C Could not find a valid BME280 sensor, check wiring!

Using Arduino Sensors
1

Hi,

I try to connect my bme280 sensor from aliexpress but it doesn't work :

I can see the sensor with address 0x76 when I do a I2C scan,
but when I do a bme.begin(0x76) it always says :
Could not find a valid BME280 sensor, check wiring!

Moreover, I found that it is because there is a error here is the adafruit lib :

// check if sensor, i.e. the chip ID is correct
if (read8(BME280_REGISTER_CHIPID) != 0x60) // ------> HERE, I READ 255 (0xFF)
return false;

Any idea ?

Don't hesitate with you need more info.

Coco

2

The AliExpress link you posted is for a BMP280 not a BME280. Try the Adafruit BMP280 library instead and let us know.

3

Also make sure you connect this sensor to 3.3V Vcc, and 3.3V I2C levels. Connecting it to 5V signals may damage it; connecting it to 5V Vcc will damage it.

I don't see level shifter or regulator on board so this breakout is not suitable for 5V.

4

Cocorico:
Moreover, I found that it is because there is a error here is the adafruit lib :

// check if sensor, i.e. the chip ID is correct
if (read8(BME280_REGISTER_CHIPID) != 0x60) // ------> HERE, I READ 255 (0xFF)
return false;

Why do you think that is an error in the library, it worked for me recently ?

5

Well, that's true. But I just tried with the BMP280 lib. Still doesn't work...

6

Well, time to ask yourself, "what am I doing wrong here"? Because with the copious amount if information provided by you to this forum, you're the only one that could possibly answer that.

And besides, in about 99.9% of the cases the error is with you, not with the software library. I may underestimate that number a bit.

7

Draw a picture of how you have the sensor wired up to your arduino and tell us what arduino your using.

8

Don't hesitate with you need more info.

Don't hesitate to read "How to use this forum", so you will have some idea what info you should have provided.