Thanks for sharing.
Regards,
Sara

Measuring Temperature
The BME280 can measure temperature over the range of -40 to 80°C.
Full accuracy of ±1.0°C is obtained over the range of 0 to 65°C. Outside that range, the accuracy can decrease to ±1.5°C.

HOWEVER, it then goes on to say:

Take note of the fact that the temperature measurement is mainly used for internal temperature compensation of the other sensors. The sensor has some amount of self-heating and so the temperature measurement will usually read SEVERAL DEGREES HIGHER (my caps) than actual temperature. If this is important for your application, you may want to compare the BME280 measured temperature against another known measurement device and apply an offset to the reading.

For my sensor in the room, I do find that the temperature reading is about 3 degC higher than shown by a separate accurate TMP117 sensor. I havn’t yet managed to compare readings for outdoors sensor.
This is a significant error if you are not aware of it.

Hello; Really like this tutorial. One thing you might consider is: obtaining the sealevel pressure from the web as this changes frequently. here is an example of a link to the information: “https://api.weather.gov/stations/KTLH/observations/latest?require_qc=true”
This returns a json table with the data in it. I’m working on this and having trouble parsing the table. Maybe you can figure this out. The link above is just one example provoded by the State of Florida. Maybe other States have similar services.

Hi.
We have a tutorial about I2C that explains how to use multiple sensors.
This might be useful: https://randomnerdtutorials.com/esp32-i2c-communication-arduino-ide/
If you don’t have pins available, you can use an I2C multiplexer: https://randomnerdtutorials.com/tca9548a-i2c-multiplexer-esp32-esp8266-arduino/

I hope this helps.

Regards,
Sara

Additionally, the BMP280 restricts what you can calculate, whilethe BME280 allows you to calculate dew point and humidex (feels like) temperatures. I bought BME280s from Amazon and received BMP280s instead. Had one soldered in place before I discovered the issue. Wish the boards were marked clearly.

I also recommend taking a look at this article: https://randomnerdtutorials.com/solved-could-not-find-a-valid-bme280-sensor/
Regards,
Sara

Hi.
Run an I2C scanner sketch to make sure of the I2C address of your sensor: https://randomnerdtutorials.com/esp32-i2c-communication-arduino-ide/#2
Regards,
Sara

Hi Giambattista,
I am having the same problem too. I even changed the sensor but nothing happened. Have you solved the problem?
Thank you.
Massimo

Cheers
Paul