HTL_tadeot_roboterfuehrerschein | Roboterführeschein für den Tag der offenen Tür

WARNING: This guide assumes you have a Raspberry Pi (Model B or newer/better) with Raspbian OS installed and 2 free USB ports. The Raspberry Pi must be connected to the internet and you’ll need to SSH onto it. You should also know how to gain superuser rights, because they are a necessity throughout the guide.
Assembly of the car Use the parts from the given list (“Stückliste.ods”) and assemble them as followed: Circuit Diagram: Fritzing:
Packages, packages, packages You now need to install a few packages, which are necessary for HOTRoad to even function. You’ll need: $ apt-get install hostapd isc-dhcp-server libjpeg8-dev imagemagick libv4l-dev Now comes the fun part.
Configuring hostapd Open up “/etc/hostapd/hostapd.conf” add the following lines: interface=wlan0 driver=nl80211 ---> Use rtl871xdrv for EDIMAX adapters ssid=HOTRoad hw_mode=g channel=11 wpa=1 wpa_passphrase=himbeerkuchen wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP CCMP wpa_ptk_rekey=600 macaddr_acl=0 If you know how, change the settings appealing to your needs! Now open up “/etc/default/hostapd” and add: DAEMON_CONF=”/etc/hostapd/hostapd.conf” For EDIMAX adapters If you are using a EDIMAX adapter you need to change the hostapd binary. Copy the given hostapd binary with the following script: $ mv /usr/sbin/hostapd /usr/sbin/hostapd.bak $ cp /home/pi/dat/hostapd /usr/sbin/
Configuring isc-dhcp-server Edit “/etc/dhcp/dhcpd.conf” and add the following: subnet 10.10.0.0 netmask 255.255.0.0 { range 10.10.0.25 10.10.0.50; option domain-name-servers 8.8.4.4; option routers 10.10.0.1; interface wlan0; } Override the existing settings in “/etc/network/interfaces” with: iface wlan0 inet static address 10.10.0.1 netmask 255.255.255.0
Configuring mjpg-streamer You need to build the given version of mjpg-streamer (no really, only the given version is working – at least for me). To achieve this you need to follow these commands: $ cd /home/pi/mjpg-streamer $ ln –s /usr/include/linux/videodev2.h $ make mjpg_streamer input_file.so output_file.so
Start scripts Everything is going well? This is the last step in this guide. You now need to tell the system to start everything when it boots. Create a file called "hrinit.sh" and add the following lines: #!/bin/sh sleep 15 cd "/home/pi/mjpg-streamer/" sudo java -jar "home/pi/dist/HOTRoad.jar" & sudo mjpg_streamer -i "./input_uvc.so -n -y -f 15 -q 20 -r 320x240" -o "./output_http.so -n -w ./www -p 80" Save the file under “/etc/init.d/” and run: $ update-rc.d /etc/init.d/hrinit.sh defaults Ignore the warnings: You are running a patchwork product. Now run these: $ update-rc.d hostapd enable $ update-rc.d isc-dhcp-server enable