BMP085 Reading Incorrectly

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cody.jiron
 
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BMP085 Reading Incorrectly

Post by cody.jiron »

I setup this sensor following the tutorial from the learning center but every time I run the example code I get a bunch of errors. When I eventually get a reading all of it is wrong. Temperature won't move off 12.8C no matter what and it reads that I'm 10,000 feet below sea level. No matter what I do it does the same thing every time. I'm very new to this but I feel like my sensor is bad. I just wanted to make sure I am not doing something dumb before I try to send back the sensor. My connections are firm and I'm using the adafruit breakout board and a mini breadboard. I'll post pics later. Thanks for any help
-Cody

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adafruit_support_bill
 
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Re: BMP085 Reading Incorrectly

Post by adafruit_support_bill »

What version Pi are you using?
What do you see in i2cdetect?
Make sure you have it configured for the right i2c bus for your version of the Pi: http://learn.adafruit.com/using-the-bmp ... pi-for-i2c

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cody.jiron
 
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Re: BMP085 Reading Incorrectly

Post by cody.jiron »

I'm pretty sure I have a version one. Here is what I see.

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adafruit_support_bill
 
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Re: BMP085 Reading Incorrectly

Post by adafruit_support_bill »

Looks like a version 1 and it is seeing the module at the right address. In Adafruit_I2C.py do you have the following line configured for bus 0?

Code: Select all

def __init__(self, address, bus=smbus.SMBus(0), debug=False): 

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cody.jiron
 
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Re: BMP085 Reading Incorrectly

Post by cody.jiron »

adafruit_support wrote:Looks like a version 1 and it is seeing the module at the right address. In Adafruit_I2C.py do you have the following line configured for bus 0?

Code: Select all

def __init__(self, address, bus=smbus.SMBus(0), debug=False): 
Yes it is set correctly.
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adafruit_support_bill
 
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Re: BMP085 Reading Incorrectly

Post by adafruit_support_bill »

One more thing to check: In the photo, some of the solder joints appear not to have flowed well onto the solder pad. The SCL pin is a critical one for i2C communication, but a couple others look suspicious as well.
Touch up those solder joints and try again. If it still doesn't work, contact [email protected] with a link to this thread for a replacement.

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cody.jiron
 
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Re: BMP085 Reading Incorrectly

Post by cody.jiron »

Yep, bad solder joints, I have it updating to google docs. Thanks for everything

-Cody

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