Unit 8 – ESP32 Web Server – Display Sensor Readings

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Florentino Fernández Cueto asked 4 years ago

Good morning Rui.
I have a small malfunction in “Unit 8 – ESP32 Web Server – Display Sensor Readings”
1) The BME280 is correctly connected
2) Both port and board are selected
3) When executing the sketch it appears:
Could not find a valid BME280 sensor, check wiring, address, sensor ID!
SensorID was: 0xFF
ID of 0xFF probably means a bad address, a BMP 180 or BMP 085
ID of 0x56-0x58 represents BMP 280,
ID of 0x60 represents BME 280.
ID of 0x61 represents BME 680.
4) BME280 wiring is ok
5) Using the sketch “SCAN I2C” I have found out the address of the BME280 = “I2C device found at address 0x76”. This also means that the ESP32 is detecting it.
I imagine that I will have to indicate the direction of my BME280 so that the sketch of this unit can work, but I do not know where it is done.
Thank you very much for your help.
A cordial greeting.

5 Answers

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Sara Santos Staff answered 4 years ago

Hi.
Did that sensor worked before with other BME280 examples? Or is this the first time you’re trying the sensor?
Are you sure you don’t have a BMP180 or other sensor? Those sensors are very similar.
How does your sensor look like?
Regards,
Sara

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Florentino Fernández Cueto answered 4 years ago

Hi Sara.
Thanks for answering.
It is the first time that I use that sensor, I am following the examples in the manual about ESP32.
I have found out that it is the BMP280, rather than the BME280, which is possibly why it doesn’t work.
Thank you

0 Vote Up Vote Down

Sara Santos Staff answered 4 years ago

In that case, you need to use a proper library for that sensor.
I recommend using this library:

https://github.com/adafruit/Adafruit_BMP280_Library

Try the example sketch and see if it works:

https://github.com/adafruit/Adafruit_BMP280_Library/blob/master/examples/bmp280test/bmp280test.ino

Then, you need to adjust the projects that use the BME280 to use the BMP280 instead.
Can you figure it out, or do you need help?
Regards,
Sara

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Florentino Fernández Cueto answered 4 years ago

Thank you very much Sara for your great help.
Indeed that was the problem, buy the BMP280 instead of the BME280. Now it works.
A cordial greeting.

0 Vote Up Vote Down

Sara Santos Staff answered 4 years ago

Great!
I’ll close this issue. If you need further help, you just need to open a new question in our forum.
Regards,
Sara