Step 1: Hardware Required:
Material to achieve the desired target includes the following hardware components:
1. H3LIS331DL
2. Raspberry Pi
3. I2C cable
4. Raspberry Pi Shield of I2C
5. Ethernet cable
Step 2: Hardware connection:
"Hardware connection" between the sensor section and substantially illustrates the wiring connection raspberry pi required. On any system to the desired output, to ensure proper connection is a basic need. Thus, the necessary connections are as follows:
H3LIS331DL will run on I2C. This is a wiring diagram of an example that demonstrates how to connect each of the sensor interfaces.
Out of the box, the board is configured to use the I2C interface, so if you are not sure, we recommend using this connection. You only need four wires!
Vcc, Gnd, SCL and SDA pins requires only four connections, and these are connected by the connection cable I2C.
These connections in the picture above has been on display.
Step 3: Python code to acceleration measurements:
"The advantage of using Raspberry Pi is that it provides a flexible programming language for you, you can use the programming language of the circuit board so that the sensor is connected to it. Take advantage of this development board, we are here to demonstrate their programming in python. Python syntax is one of the easiest most simple programming language. H3LIS331DL python code can be downloaded from our github community DCUBE Store.
For your convenience, we are still here interpreted code:
As the first step is coded using python, SMBus need to download the library because the library support used in the code. Therefore, to download the library, you can visit the following link:
https://pypi.python.org/pypi/smbus-cffi/0.5.1
You can copy the code to work here, too:
import smbus
import time
# Get I2C busbus = smbus.SMBus (1)
# H3LIS331DL address, 0x18 (24)
# Select control register 1, 0x20 (32)
# 0x27 (39) Power ON mode, Data output rate = 50 Hz # X, Y, Z-Axis enabled
bus.write_byte_data (0x18, 0x20, 0x27)
# H3LIS331DL address, 0x18 (24) # Select control register 4, 0x23 (35)
# 0x00 (00) Continuous update, Full scale selection = +/- 100g
bus.write_byte_data (0x18, 0x23, 0x00)
time.sleep (0.5)
# H3LIS331DL address, 0x18 (24)
# Read data back from 0x28 (40), 2 bytes
# X-Axis LSB, X-Axis MSB
data0 = bus.read_byte_data (0x18, 0x28)
data1 = bus.read_byte_data (0x18, 0x29)
# Convert the dataxAccl = data1 * 256 + data0
if xAccl "32767:
xAccl - = 65536
# H3LIS331DL address, 0x18 (24)
# Read data back from 0x2A (42), 2 bytes
# Y-Axis LSB, Y-Axis MSB
data0 = bus.read_byte_data (0x18, 0x2A)
data1 = bus.read_byte_data (0x18, 0x2B)
# Convert the data
yAccl = data1 * 256 + data0
if yAccl "32767:
yAccl - = 65536
# H3LIS331DL address, 0x18 (24)
# Read data back from 0x2C (44), 2 bytes
# Z-Axis LSB, Z-Axis MSB
data0 = bus.read_byte_data (0x18, 0x2C)
data1 = bus.read_byte_data (0x18, 0x2D)
# Convert the data
zAccl = data1 * 256 + data0
if zAccl "32767:
zAccl - = 65536
# Output data to screen
print "Acceleration in X-Axis:% d"% xAccl
print "Acceleration in Y-Axis:% d"% yAccl
print "Acceleration in Z-Axis:% d"% zAccl
The code is performed using the following command:
$ "Python H3LIS331DL.py gt; python H3LIS331DL.py
The output of the sensor as shown above, for reference.
Step 4: Application:
The same accelerometer like H3LIS331DL often discovers its application in the game and displays the configuration file switch. The sensor module is also used in the advanced power management system for mobile applications. H3LIS331DL is a three-axis digital acceleration sensor, which is integrated with a smart-on-chip motion trigger interrupt controller.
Editor in charge: WV, read full text
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