#gsv-6ToWAMP
This shows how to hook up a Raspberry Pi2 to a WAMP router and display real-time GSV-6CPU readings in a browser, as well as the configuration of the GSV-6CPU from the browser.
GSV6/GSV6-CPU is a measurement amplifier from ME-Messsysteme GmbH
released
All Dependencies are included.
| Dependencie | License |
|---|---|
| Autobahn | MIT License |
| Bootstrap | MIT License |
| jQuery | MIT License |
| Smoothie | MIT License |
| Moment.js | MIT License |
| Highstock | Do you want to use Highcharts/Highstock for a personal or non-profit project? Then you can use Highchcarts/Hightock for free under the Creative Commons Attribution-NonCommercial 3.0 License |
The serial2ws program will open a serial port connection with your RPi or PC. It will communicate over a specific protocol with the GSV-6CPU-module.
The serial2ws program receives and calls procedures via WAMP.
The GSV-6CPU-module sends sensor values by sending its protocol-data via serial. The data can contain a measure-frame, an answer-frame or a request-frame.
The serial2ws receives those frames, parses each frame and then receives or publishes WAMP events to the different WAMP-topics with the payload consisting of the frames.
You will need to have the following installed on the RPi to run the project:
- Python or PyPy (used in this installation tutorial)
- Twisted
- AutobahnPython
- PySerial
All downloads a dropped to ~/downloads and all installs dropped to ~/install
mkdir ~/downloads
mkdir ~/install
PyPy comes pre-installed on a Raspberry Pi with the raspian-image 2015-05-05. It comes with version 2.2.1 but we have to use version 4.0.0. For the update we have to download the latest version of PyPy, extract files and update paths.
cd ~/downloads
wget https://bitbucket.org/pypy/pypy/downloads/pypy-4.0.1-linux-armhf-raspbian.tar.bz2
cd ~/install
tar xvjf ../downloads/pypy-4.0.1-linux-armhf-raspbian.tar.bz2
echo "export PATH=\${HOME}/install/pypy-4.0.1-linux-armhf-raspbian/bin:\${PATH}" >> ~/.profile
source ~/.profile
cd ~/downloads
wget https://bootstrap.pypa.io/get-pip.py
pypy get-pip.py
cd ~/downloads
wget https://pypi.python.org/packages/source/T/Twisted/Twisted-15.4.0.tar.bz2
cd ~/install
tar xvjf ../downloads/Twisted-15.4.0.tar.bz2
cd Twisted-15.4.0
nano setup.py
line 63 comment with a # -> -> #conditionalExtensions=getExtensions(),
Ctrl + O
Ctrl + X
pypy setup.py install
pip install pyserial
pip install autobahn
for normal python use
pip install numpy
we use pypy and under pypy we can't use the normal install method. Source use the follwing line to isntall numpy with pypy
pypy -m pip install git+https://bitbucket.org/pypy/numpy.git
sudo apt-get install usbmount
Change usbmount config
sudo nano /etc/usbmount/usbmount.conf
Goto FS_MOUNTOPTIONS="" and change it to
FS_MOUNTOPTIONS="-fstype=vfat,gid=users,dmask=0007,fmask=0117"
Ctrl + O
Ctrl + X
sudo reboot
sudo apt-get install build-essential libssl-dev libffi-dev python-dev
pip install crossbar
cd ~/
git clone https://github.com/flashbac/gsv-6ToWAMP.git
cd ~/
echo "TZ='Europe/Berlin';" >> ~/.profile
echo "export TZ" >> ~/.profile
source ~/.profile
mkdir messungen
cd <projectname>
crossbar start &
check with with the browser http://<ip>:8080 -> some information have to appear there
pypy serial2ws.py --baud=115200 --port=/dev/ttyAMA0
goto http://<ip>:8000
Copy the crossbar-(start)-script and the serial2ws-(start)-script from scripts-folder to /etc/init.d/
cd ~/gsv-6ToWAMP/scripts
sudo cp crossbar /etc/init.d/
sudo cp serial2ws /etc/init.d/
Make the script runnable and add crossbar to rc.d
sudo chmod +x /etc/init.d/crossbar
sudo chmod +x /etc/init.d/serial2ws
from now on, you can start and stop crossbar and serial2ws via the deamon
sudo /etc/init.d/crossbar start
sudo /etc/init.d/crossbar stop
sudo /etc/init.d/serial2ws start
sudo /etc/init.d/serail2ws stop
autostart for crossbar and serial2ws I use the rc.local for them. open /etc/rc.local
sudo nano /etc/rc.local
edit like this
service networking restart
# Print the IP address
_IP=$(hostname -I) || true
if [ "$_IP" ]; then
printf "My IP address is %s\n" "$_IP"
fi
/etc/init.d/crossbar start
/etc/init.d/serial2ws start
if you have no connection (cabel) at eth0, it is better to disable dhcp on eth0. It will be speedup your systemstart und avoid some network glitches. set up your desired network options in /etc/network/interfaces
iface eth0 inet static
address 192.168.2.10
netmask 255.255.255.0
optinal and a gateway
gateway 192.168.2.1
or disable eth0 at all with follwing line in /etc/network/interfaces
iface eth0 inet manual
Establish the RPi as a Wifi Accespoint with hostapd Source
Verify that your wifi-adapter is on the compatible list and make sure, that you are connected via eth0 (by cable)
sudo apt-get install firmware-ralink hostapd wireless-tools dnsmasq iw
But be careful that your adapter is compatible with hostapd. Previously I use an EW-7811Un with Realtek RTL8188CUS Chipset and this one will not work out of the box with hostapd. For the Raspberry Pi you can use a pachted binary from the binary folder or build a patched Version Now I using an Adapter with Ralink RT5370 chipset. This Adapter is compatible to hostapd and works with the default hostapd driver (nl80211). If you have also an compatible adapter too, you can skip the next steps and go further to the dns configuration.
Copy hostapd-binary from git-binary Folder
cd /usr/sbin
sudo mv /usr/sbin/hostapd /usr/sbin/hostapd.bak
sudo cp gsv-6ToWAMP/binary/hostapd hostapd
sudo chown root:root hostapd
sudo chmod 755 hostapd
First of all you have to clone the repo
cd ~
git clone https://github.com/lostincynicism/hostapd-rtl8188
then install dependencies
sudo apt-get install libnl-3-dev libnl-genl-3-dev
build hostapd-rtl8188
cd hostapd-rtl8188/hostapd
make
copy hostapd-binary
cd /usr/sbin
sudo mv /usr/sbin/hostapd /usr/sbin/hostapd.bak
sudo cp hostapd-rtl8188/hostapd/hostapd hostapd
sudo chown root:root hostapd
sudo chmod 755 hostapd
create a backup from the orginal dnsmasq-config-file
sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig
Open dnsmasq-config-File with the following command
sudo nano /etc/dnsmasq.conf
Configure DHCP. Edit the file /etc/dnsmasq.conf and configure it like this
interface=wlan0
no-dhcp-interface=eth0
dhcp-range=interface:wlan0,192.168.9.2,192.168.9.30,infinite
save dnsmasq.conf changes and exit nano with
Ctrl + O
Ctrl + X
You will need to give the Pi a static IP address on the wireless interface with the following command
sudo ifconfig wlan0 192.168.9.1
To automatically set this up on boot, edit the file /etc/network/interfaces, open it by typing the following command
sudo nano /etc/network/interfaces
and replace the line "iface wlan0 inet dhcp" to (If the line "iface wlan0 inet dhcp" is not present, add the above lines to the bottom of the file.)
iface wlan0 inet static
address 192.168.9.1
netmask 255.255.255.0
broadcast 192.168.9.255
Change the lines (they probably will not all be next to each other)
allow-hotplug wlan0
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface wlan0 inet dhcp
to
#allow-hotplug wlan0
#wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
#iface wlan0 inet manual
and add one the file end follwing lines:
# restart hostapd and dnsmasq
up service hostapd restart
up service dnsmasq restart
Configure HostAPD. Create a WPA-secured network. To create a WPA-secured network, open the file hostapd.conf
sudo nano /etc/hostapd/hostapd.conf
and add the following lines and change the ssid-, channel- and wpa_passphrase-line to values of your choice. It seems to be necessary that the passphrase starts with a capital letter.
interface=wlan0
driver=nl80211
ssid=ME_AP
hw_mode=g
channel=6
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=My_Passphrase
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
open /etc/default/hostapd
sudo nano /etc/default/hostapd
and change
#DAEMON_CONF=""
to
DAEMON_CONF="/etc/hostapd/hostapd.conf"
exit with
Ctrl + O
Ctrl + X
Now run the following commands to start the access point
service networking restart
Your Pi should now be hosting a wireless hotspot. Test it.
last step reboot
sudo reboot
sometimes after reboot (and hostapd start) the pi doesnt assigne a IP address to wlan0. You can solve it by chage file /etc/default/ifplugd and change it like this Source:
sudo nano /etc/default/ifplugd
and change to
INTERFACES="eth0"
HOTPLUG_INTERFACES="eth0"
ARGS="-q -f -u0 -d10 -w -I"
SUSPEND_ACTION="stop"