A Raspberry Pi based gateway to distributed Moteino radio connected Arduinos.
After the Debian Wheezy armel image I made a new one based on Raspbian armhf. This one is compiled with hard float support, so basically floating point operations are MUCH faster because they are done in hardware instead of software emulation :)
The most interesting on here is the raspbian-ua-netinst. There is Github repo for it:
Github repo with raspbian-ua-netinst
I had previously used the Raspbian net installer here: RaspbianInstaller
But the notes now say: Currently we reccomend using hifi’s raspbian-ua-netinst instead if you want to use an installer rather than a pre-installed image.
Dark Basic Raspbian SDHC Boot image
You will have to extract the image with p7zip:
7za x raspbian_wheezy_20130923.img.7z
Then flash it to your SD with dd:
$ sudo dd bs=1M if=raspbian_wheezy_20130923.img of=/dev/sdc
Finally, if you have an sd larger than 1GB, grow the partition with gparted (first move the swap partition at the end).
$ sudo gparted /dev/sdc
At this point install the SDHC card on the RPI, plug in the ethernet cable, plug in the USB terminal cable which will power up the RPI.
Now use screen to watch the boot up messages.
Able to use screen to connect on laptop:
$ sudo screen /dev/ttyUSB0 115200
When connected check the stty values.
$ stty -a
Attempts to use socat instead of screen
$ sudo socat - /dev/ttyUSB0,b115200
$ sudo socat - /dev/ttyUSB0,b115200,raw # no
$ sudo socat - /dev/ttyUSB0,b115200,cs7 # no
$ sudo socat - /dev/ttyUSB0,b115200,parenb,cs7 # no
$ sudo socat - /dev/ttyUSB0,b115200,parenb,cs8 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs7 # no
$ sudo socat - /dev/ttyusb0,b115200,raw,cs8,start=1,stop=1 # no
$ sudo socat - /dev/ttyusb0,b115200,parenb=false,raw,cs8,start=1,stop=1 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs8 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs7 # no
$ sudo socat - /dev/ttyUSB0,b115200,raw,cs8 # no
$ sudo socat - /dev/ttyUSB0,b115200,cs8,parenb=0 # close, but not exact
$ sudo socat - /dev/ttyUSB0,b115200,cs8,parenb=0,stop=0 # close
$ sudo socat - /dev/ttyUSB0,cs8,parenb=0,stop=0,ixon=1,ixoff=1 # close
$ sudo socat - /dev/ttyUSB0,cs8,parenb=0,stop=0,ixon=1,ixoff=1,echo=0
$ sudo screen /dev/ttyUSB0 115200
$ sudo socat /dev/ttyUSB0,raw,echo=0,crlf
$ socat -d -d -d -d -x TCP:localhost:7758 FILE:/dev/ttyUSB0,b9600,raw
Found the IP address on the router: 192.168.88.223
ssh into the RPI and have a go. The root password is raspberry.
$ ssh root@192.168.88.223
Change the root password
passwd
You will have to reconfigure your timezone after the first boot:
# dpkg-reconfigure tzdata
The keyboard layout:
# dpkg-reconfigure console-data
And the localization:
# dpkg-reconfigure locales
Edit /etc/hostname to have the hostname.
$ cat /etc/hostname
pika
Edit /etc/hosts and a line with the new hostname.
$ cat /etc/hosts
127.0.0.1 localhost
127.0.0.1 pika <<< added this line with hostname
...
# adduser craig
Note that from now on:
# prompt means run as root.
$ prompt means run as user craig
# su - craig
Generate a key pair for the new user
$ ssh-keygen
Check the Debian version
$ cat /etc/debian_version
7.2
Update the system
# apt-get update
# apt-get dist-upgrade
Install python, vim, tmux, git
# apt-get install python
# apt-get install vim tmux git
Personalize git
# git config --global user.name "Your Name Here"
Sets the default name for git to use when you commit
# git config --global user.email "your_email@example.com"
Sets the default email for git to use when you commit
Set up the vim dotfiles and vundle.
$ git clone git@github.com:CootCraig/dotfiles_again.git
$ cd dotfiles_again/linux
$ bash ./install.sh
cd ~/dotfiles_again/windows/vimfiles/bundle
git clone https://github.com/gmarik/vundle.git
There are some notes on using vundle in the file ~/.vim/bundle/Readme.txt The Raspbian vim does not have python support, so disable UltiSnips vim script. Comment out the following line in ~/.vimrc
Bundle 'vim-scripts/UltiSnips'
to
"Bundle 'vim-scripts/UltiSnips'
And then run BundleInstall.
in vim. :BundleInstall
These instructions worked fine.
How to set up ssh so you aren’t asked for a password
Add the contents of the public key file into ~/.ssh/authorized_keys on the remote site (the file should be mode 600).
# apt-get install sudo
# adduser craig sudo
On the Ubuntu host.
$ sudo dd bs=1M if=/dev/sdc of=pika_20140220_1441.img
7519+0 records in
7519+0 records out
7884242944 bytes (7.9 GB) copied, 446.404 s, 17.7 MB/s
$ 7za a -t7z pika_20140220_1441.img.7z pika_20140220_1441.img
$ ls -l pika_2014*
-rw-r--r-- 1 craig craig 7884242944 Feb 20 14:49 pika_20140220_1441.img
-rw-r--r-- 1 craig craig 254215741 Feb 20 15:09 pika_20140220_1441.img.7z
# apt-get install build-essential checkinstall libtool automake uuid-dev
The following extra packages will be installed:
autoconf autotools-dev binutils bzip2 cpp cpp-4.6 dpkg-dev fakeroot g++ g++-4.6 gcc gcc-4.6 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libdpkg-perl libfile-fcntllock-perl libgmp10 libgomp1 libltdl-dev
libltdl7 libmpc2 libmpfr4 libstdc++6-4.6-dev libtimedate-perl m4 make
Suggested packages:
autoconf2.13 autoconf-archive gnu-standards autoconf-doc gettext binutils-doc bzip2-doc cpp-doc gcc-4.6-locales debian-keyring gcc-4.6-doc libstdc++6-4.6-dbg gcc-multilib manpages-dev automake1.9 flex bison gdb gcc-doc
libmudflap0-4.6-dev libgcc1-dbg libgomp1-dbg libquadmath-dbg libmudflap0-dbg binutils-gold libtool-doc libstdc++6-4.6-doc automaken gfortran fortran95-compiler gcj make-doc
The following NEW packages will be installed:
autoconf automake autotools-dev binutils build-essential bzip2 checkinstall cpp cpp-4.6 dpkg-dev fakeroot g++ g++-4.6 gcc gcc-4.6 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libdpkg-perl
libfile-fcntllock-perl libgmp10 libgomp1 libltdl-dev libltdl7 libmpc2 libmpfr4 libstdc++6-4.6-dev libtimedate-perl libtool m4 make uuid-dev
0 upgraded, 32 newly installed, 0 to remove and 0 not upgraded.
Need to get 26.8 MB of archives.
After this operation, 69.2 MB of additional disk space will be used.
Source for stable release 3.2.4
This is supported by ffi-rzmq, the JRuby librar I plan to use. I unpacked for build at:
# cd /opt/zeromq/zeromq-3.2.4
The installation will be to /usr/local/
# ./configure --help
Installation directories:
--prefix=PREFIX install architecture-independent files in PREFIX
[/usr/local]
--exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
[PREFIX]
Build and install.
# ./configure
# make
# checkinstall
A debian package was left here:
/opt/zeromq/zeromq-3.2.4/zeromq_3.2.4-1_armhf.deb
From /etc/inittab
...
# Example how to put a getty on a serial line (for a terminal)
#
#T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
#T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
...
However, this is the device file we see:
$ ls -l /dev/ttyAMA0
crw-rw---T 1 root dialout 204, 64 Dec 31 1969 /dev/ttyAMA0
So let’s add this line to /etc/inittab
...
# Example how to put a getty on a serial line (for a terminal)
#
#T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100
#T1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
...
I have failed to get Wifi working and would like some help. I’m not sure how how to troubleshoot from here. Here are some details on my setup.
Using this OS image. I want a minimal install with no X.
Dark Basic Raspbian SDHC Boot image
With this USB wifi plug: Edimax EW-7811UN
Boot time messages include these related to the Edimax plug.
[ 3.232011] usb 1-1.2: new high-speed USB device number 4 using dwc_otg
[ 3.364155] usb 1-1.2: New USB device found, idVendor=7392, idProduct=7811
[ 3.380505] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.399033] usb 1-1.2: Product: 802.11n WLAN Adapter
[ 3.411807] usb 1-1.2: Manufacturer: Realtek
[ 3.417625] usb 1-1.2: SerialNumber: 00e04c000001
...
[ 15.826605] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
System reports as.
root@pika:~# uname -a
Linux pika 3.6.11+ #545 PREEMPT Fri Sep 20 23:57:55 BST 2013 armv6l GNU/Linux
More evidence the Edimax Wifi is seen
root@pika:~# lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]
The wifi driver module is loaded
root@pika:~# lsmod
Module Size Used by
...
8192cu 490361 0
...
Output of iwconfig
root@pika:~# iwconfig
wlan0 unassociated Nickname:"<WIFI@REALTEK>"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
The MicroTik Router is seen.
root@pika:~# iwlist wlan0 scan
wlan0 Scan completed :
Cell 01 - Address: D4:CA:6D:56:86:59
ESSID:"Pirates"
Protocol:IEEE 802.11bgn
Mode:Master
Frequency:2.412 GHz (Channel 1)
Encryption key:on
Bit Rates:300 Mb/s
Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Extra:rsn_ie=30120100000fac040100000fac040100000fac02
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
Quality=100/100 Signal level=100/100
Contents of /etc/network/interfaces.
root@pika:/etc/network# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-ssid Pirates
wpa-psk thepassword
But I have not been able to enable the Wifi.
root@pika:~# ifup wlan0
Internet Systems Consortium DHCP Client 4.2.2
Copyright 2004-2011 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
[ 1389.028246] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Listening on LPF/wlan0/80:1f:02:a2:df:94
Sending on LPF/wlan0/80:1f:02:a2:df:94
Sending on Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 5
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 15
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 18
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 4
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
Note, the MicroTik router Wifi is in use by all the laptops we have tried.