I²C module adress

ESP32 mySQM+ Sky-Meter/Weather Station with loads of features

Brought to you by: brownrb

I²C module adress

Forum: General Discussion

Creator: elythomaslumber

Created: 2021-12-18

Updated: 2021-12-25

elythomaslumber - 2021-12-18

Hi,
started the project yesterday and use an ESP32 with BME280 from ARDAFRUIT. First the sensor was not recognized. Then I soldered the “adress change pad” on the back-side of the module. Now it works. Therfore I would recommend that the accepted I²C adresses for all modules will be listed in the documentation. Are they shown somewhere in the Arduino-sketch? Can I change them anywhere in the code?
Regards
Hardy

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brownrb - 2021-12-19

the addresses one would find in mydefines.h

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elythomaslumber - 2021-12-19

ahhhh, thanks a lot!

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Ralf Dinkelmeyer - 2021-12-24

Hi Robert,
I had the same issue. Maybe a hint in the documentation might be useful ("... the address is 0x76 ...there should be no reason to change...").
P.S. Again a great project from you!
Ralf

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brownrb - 2021-12-25

This is in the PDF

The I2C address of the BME280 sensor is defined as 0x76 in the myDefines.h file as BME280_I2CADDR.
There should be no reason to change this.

But considering the number of pages in the PDF, not surprised it was not found

Regards
R

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