Arduino Server - Revision history

Jvaughters at 15:35, 8 November 2012

2012-11-08T15:35:32Z

← Older revision		Revision as of 15:35, 8 November 2012
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		+	<anyweb>http://combustory.com/wiki/ads/ad_rtc.html</anyweb>
		+
		+	{{default}}
		+
		+	<anyweb>http://combustory.com/wiki/ads/ad_rtc_1.html</anyweb>
		+
	=Summary=		=Summary=
	In determining a method to create a distributed sensor network I decided to test the idea of taking some old hardware to use it as a remote server to communicate with Arduinos. The basic idea is to have a server that communicates with the Arduinos and sends the data to a central monitoring process over the network. As long as you have a network connection to the server, you can add as many Arduinos as the server can handle to monitor or control whatever it is you are trying to accomplish.The motivation for this investigation revolved around Energy Management, therefore, I may have some references that apply to that subject to use as examples.		In determining a method to create a distributed sensor network I decided to test the idea of taking some old hardware to use it as a remote server to communicate with Arduinos. The basic idea is to have a server that communicates with the Arduinos and sends the data to a central monitoring process over the network. As long as you have a network connection to the server, you can add as many Arduinos as the server can handle to monitor or control whatever it is you are trying to accomplish.The motivation for this investigation revolved around Energy Management, therefore, I may have some references that apply to that subject to use as examples.

Jvaughters: /* Configuration */

2012-11-08T02:10:45Z

Configuration

← Older revision		Revision as of 02:10, 8 November 2012
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	The PXE boot process requires a tftp server. If you decide to use this process then you will need to install that software first. I originally had some long instructions, but I decided to create a script, which is still long, so I moved it to this page: [[Arduino Sever PXE Script]]		The PXE boot process requires a tftp server. If you decide to use this process then you will need to install that software first. I originally had some long instructions, but I decided to create a script, which is still long, so I moved it to this page: [[Arduino Sever PXE Script]]
	====Operation====		====Operation====
−	* ~~Create scripts to transfer Arduino to interface with TCP port using socat command~~	+	At this stage you should have the server working and we will test it and connect to the arduino from a client.
		+
		+	Test Server:
		+	* Log into the server from the console or ssh
	* Verify that the /home/scada/scripts/arduino_init script worked with this command		* Verify that the /home/scada/scripts/arduino_init script worked with this command
	netstat -tl		netstat -tl
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	stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts		stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts
	socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1		socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1
−	If this fails, then check that /dev/arduino_1 exists, it may be a udev naming issue	+	If this fails, then check that /dev/arduino_1 exists, it may be a udev naming issue. See this article for assitance with udev: [[Arduino Communications Device Naming with udev]]
−	* Connect to TCP port 2111 from another computer	+	* Connect to TCP port 2111 from another computer (If you have trouble try this as root)
	rm -f /home/scada/data/arduino_1_in		rm -f /home/scada/data/arduino_1_in
	mkfifo /home/scada/data/arduino_1_in		mkfifo /home/scada/data/arduino_1_in
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	* Send a command to the pipe into the nc command		* Send a command to the pipe into the nc command
	echo S > /home/scada/data/arduino_1_in		echo S > /home/scada/data/arduino_1_in
		+	=More Investigation=
	* Create scripts to connect to the port on the Arduino Server and collect data		* Create scripts to connect to the port on the Arduino Server and collect data
	* Discuss security and ssh		* Discuss security and ssh

Jvaughters: /* Configuration */

2012-11-08T01:30:31Z

Configuration

← Older revision		Revision as of 01:30, 8 November 2012
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	==Configuration==		==Configuration==
	===PXE Setup===		===PXE Setup===
−	The PXE boot process requires a tftp server. If you decide to use this process then you will need to install that software first.	+	The PXE boot process requires a tftp server. If you decide to use this process then you will need to install that software first. I originally had some long instructions, but I decided to create a script, which is still long, so I moved it to this page: [[Arduino Sever PXE Script]]
−	~~====Development Environment====~~	+
−	* download TinyCore-current.iso	+
−	* mount TinyCore-current.iso and copy entire contents of the iso to a tftboot directory	+
−	~~<pre>~~	+
−	~~sudo mkdir /mnt/tmp~~	+
−	~~sudo mount TinyCore-current.iso /mnt/tmp -o loop~~,ro	+
−	~~sudo cp -r /mnt/tmp/* /tftpboot/tinycore/~~	+
−	~~sudo umount /mnt/tmp~~	+
−	~~</pre>~~	+
−	* copy core.gz to a ~~development dir~~	+
−	~~<pre>~~	+
−	~~sudo cp /tftpboot/tinycore/boot/core.gz /tftpboot/tinycore_dev/~~	+
−	~~</pre>~~	+
−	* extract core.gz	+
−	~~mkdir /tftpboot/tinycore_dev/core_root~~	+
−	~~cd /tftpboot/tinycore_dev/core_root~~	+
−	~~zcat ../core.gz \| sudo cpio -i -H newc -d~~	+
−	* modify/add files/dirs in the development dir (use chroot commands for setting passwords and other system level settings)	+
−	** Add these directories	+
−	~~mkdir /tftpboot/tinycore_dev/core_root/home/scada~~	+
−	~~mkdir /tftpboot/tinycore_dev/core_root/home/scada/scripts~~	+
−	~~mkdir /tftpboot/tinycore_dev/core_root/home/scada/data~~	+
−	** create this file	+
−	~~touch /tftpboot/tinycore_dev/core_root/home/scada/scripts/arduino_init~~	+
−	** Add these lines to the file:	+
−	~~<pre>~~	+
−	~~#!/bin/bash~~	+
−	~~# arduino_init - initialization tasks for scada~~	+
−	~~### Main~~ script ~~starts here ###~~	+
−	~~# Store file name of arduino~~	+
−	~~FILE="/dev/arduino_1"~~	+
−		+
−	~~# Arduino Communications~~	+
−	~~# set serial commuication for arduino~~	+
−	~~stty -F $FILE cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts~~	+
−	~~# make sure file (serial device) exist and is readable~~	+
−	~~if ! pidof socat TCP-LISTEN:2111~~,~~fork OPEN:/dev/arduino_1; then~~	+
−	~~echo "$FILE~~ is ~~not logging"~~	+
−	~~if [ ! -c $FILE ]; then~~	+
−	~~echo "$FILE : does not exists"~~	+
−	~~exit 1~~	+
−	~~elif [ ! -r $FILE ]; then~~	+
−	~~echo "$FILE: can not read"~~	+
−	~~exit 2~~	+
−	~~else~~	+
−	~~socat TCP-LISTEN:2111~~,~~fork OPEN:/dev/arduino_1~~	+
−	~~echo "start process - socat TCP-LISTEN:2111,fork OPEN:$FILE"~~	+
−	fi	+
−	fi	+
−	~~exit 0~~	+
−	~~</pre>~~	+
−	** Make arduino_init executable	+
−	~~chmod 755 /tftpboot/tinycore_dev/core_root/home/scada/scripts/arduino_init~~	+
−	** Edit this file:	+
−	~~nano /tftpboot/tinycore_dev/core_root/opt/bootlocal.sh~~	+
−	** Add these lines	+
−	~~/etc/init.d/dropbear start~~	+
−	~~sh /home/scada/scripts/arduino_init &~~	+
−	** create this file:	+
−	~~touch /tftpboot/tinycore_dev/core_root/etc/udev/rules.d/98-arduino.rules~~	+
−	** We need to put the rules of our Arduinos in this file and this is a subject on it~~'s own. Refer~~ to this ~~[http://combustory.com/wiki/index.php/Arduino_Communications_Device_Naming_with_udev udev naming]~~ page	+
−	** Here is an example of what I used	+
−	~~SUBSYSTEMS=="usb", ATTRS{serial}=="A700618T", ATTRS{product}=="FT232R USB UART", ATTRS{idProduct}=="6001", ATTRS{idVendor}=="0403", NAME="arduino_1"~~	+
−	* pack up the new core and move it to the PXE boot dir (show script for doing this)	+
−	~~cd /tftpboot/tinycore_dev/core_root~~	+
−	~~sudo find \| sudo cpio -o -H newc \| gzip -2 > ../ard-core.gz~~	+
−	~~cd ..~~	+
−	~~cp ard-core.gz /tftpboot/tinycore/boot/~~	+
−		+
−	~~====Booting Process====~~	+
−	* modify PXE boot settings to boot with your new root image	+
−	** Create the following directory and file	+
−	~~mkdir /tftpboot/tinycore/pxelinlux.cfg~~	+
−	~~touch /tftpboot/tinycore/pxelinlux.cfg/default~~	+
−	** Put this text in the default file	+
−	~~default boot/vmlinuz~~	+
−	~~append initrd=boot/ard-core.gz tftplist=172.1.1.150~~:~~/tinycore/cde/onboot_x.lst xvesa=800x600x32~~	+
−	** Copy PXE ~~boot file~~	+
−	~~cp /usr/share/syslinux/pxelinux.0 /tftpboot/tinycore/~~	+
−	** If you cannot find pxelinux.0 file on your system then download syslinux from here:	+
−	~~<nowiki> http://www.kernel.org/pub/linux/utils/boot/syslinux/4.xx/syslinux-4.06.tar.gz</nowiki>~~	+
−	** you will find pxelinux.0 file in /syslinux-4.06/core/ directory of the archive	+
−	** example of how to set up the .lst files to load expansion modules	+
−	** Download the following files:	+
−	~~<pre>~~	+
−	~~cd /tftpboot/tinycore/cde/optional~~	+
−	~~wget http://distro.ibiblio.org/tinycorelinux/4.x/x86/tcz/dropbear.tcz~~	+
−	~~wget http://distro.ibiblio.org/tinycorelinux/4.x/x86/tcz/socat.tcz~~	+
−	~~wget http://distro.ibiblio.org/tinycorelinux/4.x/x86/tcz/usb-serial-3.0.21-tinycore.tcz~~	+
−	~~</pre>~~	+
−	** introduce the TinyCore [http://distro.ibiblio.org/tinycorelinux/faq.html#bootcodes boot codes] ~~and provide your example~~	+
−	* log into the booted computer and test/verify the configuration and update image and reboot if needed	+
−		+
	====Operation====		====Operation====
	* Create scripts to transfer Arduino to interface with TCP port using socat command		* Create scripts to transfer Arduino to interface with TCP port using socat command

Jvaughters: /* Development Environment */

2012-11-04T01:57:19Z

Development Environment

← Older revision		Revision as of 01:57, 4 November 2012
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	mkdir /tftpboot/tinycore_dev/core_root/home/scada/data		mkdir /tftpboot/tinycore_dev/core_root/home/scada/data
	** create this file		** create this file
−	~~nano~~ /tftpboot/tinycore_dev/core_root/home/scada/scripts/arduino_init	+	touch /tftpboot/tinycore_dev/core_root/home/scada/scripts/arduino_init
−	** Add these lines:	+	** Add these lines to the file:
	<pre>		<pre>
	#!/bin/bash		#!/bin/bash
Line 97:		Line 97:
	cd ..		cd ..
	cp ard-core.gz /tftpboot/tinycore/boot/		cp ard-core.gz /tftpboot/tinycore/boot/
		+
	====Booting Process====		====Booting Process====
	* modify PXE boot settings to boot with your new root image		* modify PXE boot settings to boot with your new root image

Jvaughters: /* PXE Setup */

2012-11-04T01:51:50Z

PXE Setup

← Older revision		Revision as of 01:51, 4 November 2012
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	==Configuration==		==Configuration==
	===PXE Setup===		===PXE Setup===
−	The PXE boot process is	+	The PXE boot process requires a tftp server. If you decide to use this process then you will need to install that software first.
	====Development Environment====		====Development Environment====
	* download TinyCore-current.iso		* download TinyCore-current.iso

Jvaughters: /* Operation */

2012-11-04T01:41:49Z

Operation

← Older revision		Revision as of 01:41, 4 November 2012
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	socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1		socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1
	If this fails, then check that /dev/arduino_1 exists, it may be a udev naming issue		If this fails, then check that /dev/arduino_1 exists, it may be a udev naming issue
−	* Connect to TCP from another computer	+	* Connect to TCP port 2111 from another computer
	rm -f /home/scada/data/arduino_1_in		rm -f /home/scada/data/arduino_1_in
	mkfifo /home/scada/data/arduino_1_in		mkfifo /home/scada/data/arduino_1_in
−	tail -f /home/scada/data/arduino_1_in \| nc ~~192~~.~~168~~.1.147 2111 > /home/scada/data/arduino_1 &	+	tail -f /home/scada/data/arduino_1_in \| nc 172.1.1.147 2111 > /home/scada/data/arduino_1 &
	* Send a command to the pipe into the nc command		* Send a command to the pipe into the nc command
	echo S > /home/scada/data/arduino_1_in		echo S > /home/scada/data/arduino_1_in

Jvaughters: /* Operation */

2012-11-04T01:38:03Z

Operation

← Older revision		Revision as of 01:38, 4 November 2012
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	netstat: /proc/net/tcp6: No such file or directory		netstat: /proc/net/tcp6: No such file or directory
	This shows the port 2111 we are looking for to show that the arduino_init script worked. If you do not see that line, then it did not work.		This shows the port 2111 we are looking for to show that the arduino_init script worked. If you do not see that line, then it did not work.
−	* socat ~~example of TCP to serial port - you have to set the serial port with stty -~~ This resets the program in Arduino after a reconnect to port.	+	* Try to manually run socat command: (Note:This resets the program in Arduino after a reconnect to port)
	stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts		stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts
	socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1		socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1
		+	If this fails, then check that /dev/arduino_1 exists, it may be a udev naming issue
	* Connect to TCP from another computer		* Connect to TCP from another computer
	rm -f /home/scada/data/arduino_1_in		rm -f /home/scada/data/arduino_1_in

Jvaughters: /* Operation */

2012-11-04T01:30:21Z

Operation

← Older revision		Revision as of 01:30, 4 November 2012
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	====Operation====		====Operation====
−	* Create scripts to transfer Arduino to interface with TCP port using nc command	+	* Create scripts to transfer Arduino to interface with TCP port using socat command
−	* ~~Create~~ scripts ~~to connect to~~ the port on the ~~Arduino Server and collect data~~	+	* Verify that the /home/scada/scripts/arduino_init script worked with this command
		+	netstat -tl
		+	Expected command ouput:
		+	Active Internet connections (only servers)
		+	Proto Recv-Q Send-Q Local Address Foreign Address State
		+	tcp 0 0 0.0.0.0:2111 0.0.0.0:* LISTEN
		+	tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
		+	netstat: /proc/net/tcp6: No such file or directory
		+	This shows the port 2111 we are looking for to show that the arduino_init script worked. If you do not see that line, then it did not work.
	* socat example of TCP to serial port - you have to set the serial port with stty - This resets the program in Arduino after a reconnect to port.		* socat example of TCP to serial port - you have to set the serial port with stty - This resets the program in Arduino after a reconnect to port.
	stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts		stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts
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	* Send a command to the pipe into the nc command		* Send a command to the pipe into the nc command
	echo S > /home/scada/data/arduino_1_in		echo S > /home/scada/data/arduino_1_in
		+	* Create scripts to connect to the port on the Arduino Server and collect data
	* Discuss security and ssh		* Discuss security and ssh
	* Discuss file transfer methods		* Discuss file transfer methods
	* Discuss cron jobs and set up		* Discuss cron jobs and set up
	* This section will end up being a wide scope with many ideas presented and possibly referenced		* This section will end up being a wide scope with many ideas presented and possibly referenced

Jvaughters: /* Operation */

2012-11-04T01:07:04Z

Operation

← Older revision		Revision as of 01:07, 4 November 2012
Line 125:		Line 125:
	* Create scripts to connect to the port on the Arduino Server and collect data		* Create scripts to connect to the port on the Arduino Server and collect data
	* socat example of TCP to serial port - you have to set the serial port with stty - This resets the program in Arduino after a reconnect to port.		* socat example of TCP to serial port - you have to set the serial port with stty - This resets the program in Arduino after a reconnect to port.
		+	stty -F /dev/arduino_1 cs8 115200 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts
	socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1		socat TCP-LISTEN:2111,fork OPEN:/dev/arduino_1
	* Connect to TCP from another computer		* Connect to TCP from another computer

Jvaughters: /* Booting Process */

2012-11-04T00:50:11Z

Booting Process

← Older revision		Revision as of 00:50, 4 November 2012
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	cp ard-core.gz /tftpboot/tinycore/boot/		cp ard-core.gz /tftpboot/tinycore/boot/
	====Booting Process====		====Booting Process====
−	* modify PXE boot settings to boot with your new root image.	+	* modify PXE boot settings to boot with your new root image
−	** ~~example of~~ default boot ~~properties and~~ file	+	** Create the following directory and file
		+	mkdir /tftpboot/tinycore/pxelinlux.cfg
		+	touch /tftpboot/tinycore/pxelinlux.cfg/default
		+	** Put this text in the default file
		+	default boot/vmlinuz
		+	append initrd=boot/ard-core.gz tftplist=172.1.1.150:/tinycore/cde/onboot_x.lst xvesa=800x600x32
		+	** Copy PXE boot file
		+	cp /usr/share/syslinux/pxelinux.0 /tftpboot/tinycore/
		+	** If you cannot find pxelinux.0 file on your system then download syslinux from here:
		+	<nowiki> http://www.kernel.org/pub/linux/utils/boot/syslinux/4.xx/syslinux-4.06.tar.gz</nowiki>
		+	** you will find pxelinux.0 file in /syslinux-4.06/core/ directory of the archive
	** example of how to set up the .lst files to load expansion modules		** example of how to set up the .lst files to load expansion modules
	** Download the following files:		** Download the following files: