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Low cost 9 degrees of freedom module (GY-85 6DOF 9DOF)

I just bought a low-cost 9 degrees of freedom module at [AliExpress][1].

Contained sensors

Mnemonic	Description	Datasheet	Arduino library
ADXL345	accelerometer	[Datasheet][2]	[Adafruit_ADXL345 library][7]
HMC5883L	digital compass	[Datasheet][3]	[Arduino-HMC5883L library][8]
ITG3205	MEMS gyroscope	[Datasheet][4]	[ITG3205 library][9]

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Installing Wifi from the command line

Finding the Acces Point (AP)

With the following command you can see a list of available Access Points (AP).

$ iwlist wlan0 scan

Find the one you want to use and pick the ESSID, i.e. ESSID: "my_network"

Preparing the Preshared Key (PSK) for Wi-Fi Protected Access (WPA)

When using Wi-Fi Protected Access (WPA) you will need to generate the Pre-shared key (PSK) with your (E)SSID you picked before and the PASSWORD used to connect to the Access Point:

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MCP3008

![MCP3008_Pins][1]

Pin MCPP	Mnemonic MCPP	Pin Raspberry
16	VDD	3.3V
15	VREF	3.3V
14	AGND	GROUND
13	CLK	GPIO11 (P1-23)

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MMA7361 Pin description

![MMA7361_PCB][1]

Pin	Mnemonic	Description
X	X-axis	This is the analog signal out along the X-axis
Y	Y-axis	This is the analog signal out along the Y-axis
Z	X-axis	This is the analog signal out along the Z-axis
SL	Sleep	This pin will put the chip to sleep when pulled low to consume less power and will resume operation when pulled high.

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Wiring and accessing an ADXL345 3-axis accelerometer with a Raspberry Pi (Zero)

ADXL345 Pinout

![ADXL345_Pinout_Image][1]

Pin	No. Mnemonic	Description
1	VDD	I/O Digital Interface Supply Voltage.
2	GND	Must be connected to ground.
3	Reserved	Reserved. This pin must be connected to VS or left open.

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Schema, layout and autorouting software:

• http://www.cadsoftusa.com/download-eagle/

Tutorials for Eagle:

• https://learn.sparkfun.com/tutorials/using-eagle-schematic

PCB productions:

• http://www.seeedstudio.com/service/index.php?r=pcb
• https://oshpark.com

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import java.io.File;
import java.io.FileFilter;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class JavaFileOperations {

    public void findAllXmlFilesInFolderWithJavaIO() {

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    var http = require('http');
    

    it('should send a get request to the config restlet.', function () {

        var gotResponse = false;
        var myResponse = {};

        //this function to wait the rest to respond back
        function waitForBackend() {

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git ls-files --others --exclude-standard | xargs -I {} -n1 rm "{}"

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Embedded Programming with the GNU Toolchain - http://www.bravegnu.org/gnu-eprog/