BMP180 didn't get recognized on I2C bus

free118

Hello,
I’ve got a problem with my bmp180 devices.
I’m not able to get them into Pimatic. The plugin comes up with “Fail to set address”.
So i tried the Adafruit example link text
And get the following error:

Traceback (most recent call last):
File "examples/simpletest.py", line 37, in
sensor = BMP085.BMP085()
File "build/bdist.linux-armv7l/egg/Adafruit_BMP/BMP085.py", line 69, in init
File "build/bdist.linux-armv7l/egg/Adafruit_BMP/BMP085.py", line 72, in _load_calibration
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 200, in readS16BE
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 177, in readS16
File "build/bdist.linux-armv7l/egg/Adafruit_GPIO/I2C.py", line 164, in readU16
File "build/bdist.linux-armv7l/egg/Adafruit_PureIO/smbus.py", line 173, in read_word_data
IOError: [Errno 5] Input/output error

Looks like the script couldn’t find the sensor.
But i2cdetect -y 1 returns 0x77 as address.
There is nothing else on the bus, and we i try other sensors these are fine.

Has anyone an idea how to proceed here?
Thanks

Free

mwittig

Are you using pimatic-bmp180? Then you should use the wiring schema given in README. https://github.com/int020h/pimatic-bmp180

Please also make sure you have enabled i2c properly as described in the remainder of the adafruit tutorial you’ve mentioned. Following this you should be able to detect the sensor, e.g. using the i2cdetect command.

Another more in-depth tutorial on how to setup i2c is gven here: https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c

free118

Hey, thanks for wirting.
Like you see above I see the sensors Address on the Bus and I have checked the wiring. Change the Sensor and PI so everytime the same issue.
I have checked blacklist entrie’s ect. like shown in your link

Any Idea?
Thanks

free118

Get it solved by using Johnny Five plugin!