I2C address for BME280 GYBMEP 0x76 about adafruit_bme280_library HOT 21 CLOSED

yes, the code supports passing in alternate i2c addresses already :)

https://github.com/adafruit/Adafruit_BME280_Library/blob/master/Adafruit_BME280.h#L133

from adafruit_bme280_library.

For who has the same issue and search for a quick solution:

simply use bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c, address=0x76)

from https://circuitpython.readthedocs.io/projects/bme280/en/latest/

from adafruit_bme280_library.

By the way, it is pretty easy to change the address.
Of the 3 solder pads the first 2 are connected, rip the connection with a knife and connect the center one with the last pad instead, this will pull the SDO pin of the BME280 up and change the base address to 0x77 which is convenient if you want to use 2 BME280 on the same bus.
CHECK if you have ripped the connection properly or you will short VCC to GND :P

According to these schematics, the creator intended to have a switch on the pads to allow for convenient changing of the address. https://ae01.alicdn.com/kf/HTB1LnM.JFXXXXbAXFXXq6xXFXXXC/10pcs-DC1-8-5V-I2C-BME280-Digital-Barometric-Pressure-Altitude-Sensor-Temperature-Humidity-Module-for-Arduino.jpg

from adafruit_bme280_library.

@JasonG-FR thanks for the comment, it really helped me!
Was having trouble getting two sensors to read in i2c, I needed to use:

bool status;

status = bme1.begin(0x77);
status = bme2.begin(0x76);

Cheers :)

from adafruit_bme280_library.

with this
https://github.com/Seeed-Studio/Grove_BME280
works with no traumatic board work
https://www.youtube.com/watch?v=PidE-pJiIXY
i have low level of knowledge....only a copy+paste and first shot and after think...sorry

from adafruit_bme280_library.

For anyone having the same issue, here is how I managed to make it work :
I simply replaced status = bme.begin(); by status = bme.begin(0x76); in the bme280test.ino sketch.

from adafruit_bme280_library.

@ColomeDisco Sorry I made a mistake, you can only connect 2 Adafruit module on the i2c bus at the same time : https://forums.adafruit.com/viewtopic.php?f=22&t=128043
If you want to use 4 at the same time, you could use SPI instead:

If you want to connect multiple BME280's to one microcontroller, have them share the SDI, SDO and SCK pins. Then assign each one a unique CS pin.

from https://learn.adafruit.com/adafruit-bme280-humidity-barometric-pressure-temperature-sensor-breakout/pinouts

from adafruit_bme280_library.

Thanks a lot techi602 ...

It's very usefull to me ...

from adafruit_bme280_library.

Thanks, it helped me.

from adafruit_bme280_library.

Similar issue applies to the BMP280 lib as well

from adafruit_bme280_library.

Thanks! I have the same issue with the same sensor 😉

from adafruit_bme280_library.

Thanks! Helped me too!

from adafruit_bme280_library.

Of the 3 solder pads the first 2 are connected, rip the connection with a knife and connect the center one with the last pad instead

Thanks DooMMasteR. I thought that might be the case but couldn't find anywhere that said that conclusively.

from adafruit_bme280_library.

Did i get the lpc1768 code for BMP280

from adafruit_bme280_library.

Thank you for a link to Seeed, really useful, just worth mentioning, that I am using a BMP sensor attached to a GY-91 module instead of a BME sensor, but it has the same address as BME (0x76), so all that I had to do is just download and install the BMP280 zip also change the address entry in the library file in the sketch folder and everything works perfectly!

from adafruit_bme280_library.

Man, thank you so fvcking much. Honestly without this thread I was done. Thanks.

from adafruit_bme280_library.

Hi, Is possible to connect 4 devices at the same i2c bus?
I want to make a project to diferential values like a pitot Tube
tanks

from adafruit_bme280_library.

@ColomeDisco yes it's possible to connect more than 4 devices on the i2c bus.

The issue is to get each one a unique address.

If you want to use 4 BME280, the Adafruit ones have 2 jumper solder pads that could be used to change their address, so 4 unique addresses in total.

from adafruit_bme280_library.

Ok, Thanks for the response, but I not have clear documentation how to do it...
do you have some link or information about it?
thanks again!!

from adafruit_bme280_library.

I was getting OSError: [Errno 121] Remote I/O error and ValueError: No I2C device at address: 77 after my sensor made contact with condensation in a gravity-assisted experiment failure. This cleared the errors right up!

from adafruit_bme280_library.

Worked for me as well with bme.begin(0x76)

from adafruit_bme280_library.