Hardware Reference
In-Depth Information
the 3V, SDA, SCL, and GND pins. They line up perfectly, so you
will not have any crossed lines. You can connect only one of
these sensors to your FLORA, but you can connect other I2C
sensors/outputs by using the set of SCL/SDA pins on the oppo-
site side.
Dimensions : 14 mm/.55 diameter × 1.8 mm/.07 thick
Understanding I2C
Inter-Integrated Circuits, or I2C as it is more commonly known,
is a way for devices to communicate with each other. The big
advantage of I2C is that you can have many devices that com-
municate with each other while only using two wires. Using I2C-
compatible sensors like the FLORA accelerometer/compass
sensor ensures you will have plenty of available pins on your
FLORA for buttons, blinking LEDs, etc.
FLORA Accelerometer/Compass/Gyro
(Motion Sensor)
The FLORA 9 degrees of freedom (9DOF) sensor ( Figure 3-9 )
has all the same functions as the accelerometer/compass mod-
ule, but with an added gyroscope for sensing orientation. Each
sensor has three axes, so all together it's called “nine degrees of
freedom” and lets you sense orientation and heading in 3D
space by combining the output of all the sensors. You could use
this module to create your own fitness/activity monitor or track
your head for a DIY Oculus Rift.
The FLORA 9DOF sensor is based on the LSM9DS0 chip and
has a digital (I2C) interface. Just like with the other FLORA sen-
sors, you can only connect one 9DOF sensor to your FLORA, but
you can connect other I2C sensors/outputs by using the set of
SCL/SDA pins on the opposite side.
Dimensions : 16 mm/.63 diameter × .8 mm/.03 thick
 
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