Purple GY-BME280 Sensors

Other Hardware Sensors
1

Hi,

I was wondering if anyone had managed to get one of these devices working:

there dosen't seem to be a useful data sheet anywhere for them only in Chinese, I have tried all sorts to get mine working but no luck..

thanks
Stuart

2

Did you try a Google search on;

'arduino bmp280'

That points to the Adafruit BMP280 library.

3

Hi,

Googled till I am blue in the face m8 which is why I am asking for Help on here, there seems to be a lot of missleading advice on the net as these are NOT the breakout boards supplied by Adafruit (Blue Board), if anyone has managed to get one going I would be grateful for a clue.

thanks
Stuart

4

Shouldn't be too hard indeed - just wire it up (I2C connection - make sure you don't connect them to 5V unless the board is designed for that!) and use a regular BMP280 library.

5

Those boards work with the Adafruit Library, assuming you have the I2C address correct.

There are other I2C libraries too, all that I have tried work with those breakout boards.

6

Hi guys,

Yes I have done all this, Adafruit sketches, other sketches, tried different i2c addresses in code including changing headers, level shifters, no level shifters, I think I just have to say that these are a duff batch and try a different flavour, I see there are some Purple 4 pin ones on Ebay.

thanks
Stuart

p.s. I have some Blue 4 pin I2c BMP 280 sensors that worked first time however I am looking for the extra functionality of the BME 280

7

What do you get with the I2C scanner?

Are those headers soldered in?

If it doesn't have level shifters and regulator on board the sensor is very likely dead since you connected it to the 5V supply.

8

The product data sheet linked in the OP clearly states that this is a 3.3V ONLY sensor. So if it has been connected to a 5V Arduino, it is dead.

9

Hi Jremington,

Thanks for the advice on quality questions and useless answers, unfortunately your answer falls into the useless category as the sensors have never been connected to a 5 volt supply and I have never said that they were, I was merely asking if anyone had experience of the devices.

Thanks
Stuart

10

acestu:
Thanks for the advice on quality questions and useless answers, unfortunately your answer falls into the useless category as the sensors have never been connected to a 5 volt supply and I have never said that they were

The problem here is that your provided information is awfully limited and incomplete, so gaps are filled in based on experience.

Note that you mentioned before you tried lots of things including:

acestu:
level shifters, no level shifters,

This implies you're working with a 5V Arduino or the level shifters don't make any sense. 5V signals to the sensor's I2C pins from your Arduino is just as deadly to the sensor as 5V power supply, even if the sensor itself is connected to the Arduino's 3.3V power output.

11

Why bother to post, if you don't actually read the responses you get?

12

acestu:
Thanks for the advice on quality questions and useless answers, unfortunately your answer falls into the useless category as the sensors have never been connected to a 5 volt supply and I have never said that they were

You made clear you had connected your 3.3V sensor to the the 5V logic pins of the 5V Arduino;

Yes I have done all this, Adafruit sketches, other sketches, tried different i2c addresses in code including changing headers, level shifters, no level shifters

Connecting 5V logic pins to a 3.3V device could well damage it ...................