ESP8266 Community Forum

Hi there,

I want to use a BME280 on a Wemos D1 Mini, but somehow can't get it to work.
I've used the BME280 on various arduinos before using the Adafruit lib, but no idea why it isn't working
with the Wemos.

Here is my code:

https://gist.github.com/solars/1bebe10d ... 3ea60aa6a6

The output is:



The pins I use are SDA -> D2, SCL -> D1

Can anyone help me?

An esp8266 is not an 'Arduino'. If you mean Arduino AVR family then they mostly run at 5v whereas an esp8266 runs at 3.3v, as do its GPIOs.

That does work on the ESP so its probably just some set up problem. Some BME280's have different I2C addresses, i think by default the Adafruit library uses address 0x77 but some BME280's use 0x76, try the I2C scanner finds - https://playground.arduino.cc/Main/I2cScanner - or just try it - bme.begin(0x76).

Do you have pullups on your I2C lines?
See here https://learn.sparkfun.com/tutorials/i2c/i2c-at-the-hardware-level