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[Paparazzi-devel] I2C Questions

From: Kurtis Kraemer
Subject: [Paparazzi-devel] I2C Questions
Date: Tue, 30 Nov 2010 19:20:14 -0500

I just received an ArduIMU that I would like to integrate into my Tiny2.11. I also have Eagle Tree Airspeed and Altitude sensors that I have not yet integrated.
Each of these sensors uses I2C, but I am uncertain whether or not I can use all of these sensors simultaneously through the single I2C bus on the Tiny/TWOG.
From what I can tell from the wiki (, I can set a particular I2C address for each module:
<param name="AIRSPEED_ETS_I2C_DEV" value="i2c1"/>
However, is there a limit to how many can be used? i.e. "i2c0", "i2c1", "i2c2", etc. Also, what is the parameter name for setting the ArduIMU address?
Is there anything else that I need to change to get them to work together?
As for wiring, do I just connect the SDA and SCL of each sensor in parallel with each other, or in series?
- Kurtis

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