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208 bytes added ,  22:50, 10 February 2021
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4. If after a few seconds the Raspberry WiFi isn't connected:
 
4. If after a few seconds the Raspberry WiFi isn't connected:
 
  <nowiki>
 
  <nowiki>
    sudo ifdown wlan0
+
    sudo ifdown wlan0
    sudo ifup wlan0 </nowiki>
+
    sudo ifup wlan0 </nowiki>
    
===WPA2 + hidden SSID===
 
===WPA2 + hidden SSID===
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Edit /etc/network/interfaces
 
Edit /etc/network/interfaces
 
  <nowiki>
 
  <nowiki>
    # /etc/network/interfaces
+
    # /etc/network/interfaces
    allow-hotplug wlan0
+
    allow-hotplug wlan0
    auto wlan0
+
    auto wlan0
    iface wlan0 inet dhcp
+
    iface wlan0 inet dhcp
    wpa-ap-scan 1
+
    wpa-ap-scan 1
    wpa-scan-ssid 1
+
    wpa-scan-ssid 1
    wpa-ssid "SSID"
+
    wpa-ssid "SSID"
    wpa-proto RSN
+
    wpa-proto RSN
    wpa-pairwise CCMP
+
    wpa-pairwise CCMP
    wpa-key-mgmt WPA-PSK
+
    wpa-key-mgmt WPA-PSK
    wpa-psk "PASS"</nowiki>
+
    wpa-psk "PASS"</nowiki>
    
==wpa_suplicant==  
 
==wpa_suplicant==  
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Edit /etc/network/interfaces
 
Edit /etc/network/interfaces
 
  <nowiki>auto lo
 
  <nowiki>auto lo
   
+
   
    iface lo inet loopback
+
    iface lo inet loopback
    iface eth0 inet dhcp
+
    iface eth0 inet dhcp
   
+
   
    allow-hotplug wlan0
+
    allow-hotplug wlan0
    auto wlan0
+
    auto wlan0
   
+
   
    iface wlan0 inet dhcp
+
    iface wlan0 inet dhcp
            pre-up wpa_supplicant -Dwext -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -B</nowiki>
+
            pre-up wpa_supplicant -Dwext -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -B</nowiki>
 
Edit /etc/wpa_supplicant/wpa_suplicant.conf
 
Edit /etc/wpa_supplicant/wpa_suplicant.conf
 
  <nowiki>
 
  <nowiki>
    ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
+
    ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
    update_config=1
+
    update_config=1
   
+
   
    network={
+
    network={
        ssid=NETWORK_NAME # it can be any encryption type, just make sure to add the "scan_ssid=1" line after your settings.
+
        ssid=NETWORK_NAME # it can be any encryption type, just make sure to add the "scan_ssid=1" line after your settings.
        psk=password_without_double_quotes
+
        psk=password_without_double_quotes
        scan_ssid=1
+
        scan_ssid=1
        mode=0
+
        mode=0
        protp=WPA2
+
        protp=WPA2
        key_mgmt=WPA-PSK
+
        key_mgmt=WPA-PSK
        pairwise=CCMP
+
        pairwise=CCMP
        group=CCMP
+
        group=CCMP
        auth_alg=OPEN
+
        auth_alg=OPEN
        id_str="raspII"
+
        id_str="raspII"
        priority=1
+
        priority=1
   
+
   
    } </nowiki>
+
    } </nowiki>
 
Another example:
 
Another example:
 
  <nowiki>ctrl_interface=/var/run/wpa_supplicant
 
  <nowiki>ctrl_interface=/var/run/wpa_supplicant
    update_config=1
+
    update_config=1
    ap_scan=2
+
    ap_scan=2
    eapol_version=1
+
    eapol_version=1
    network={
+
    network={
            ssid="YOUR-SSID-GOES-HERE"
+
            ssid="YOUR-SSID-GOES-HERE"
            scan_ssid=1
+
            scan_ssid=1
            mode=0
+
            mode=0
            proto=WPA2
+
            proto=WPA2
            pairwise=TKIP
+
            pairwise=TKIP
            group=TKIP
+
            group=TKIP
            key_mgmt=WPA-PSK
+
            key_mgmt=WPA-PSK
            psk="YOUR-PASSWORD-GOES-HERE"
+
            psk="YOUR-PASSWORD-GOES-HERE"
    }</nowiki>
+
    }</nowiki>
    
==Domain name setup==
 
==Domain name setup==
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sudo /etc/init.d/hostname.sh<br />
 
sudo /etc/init.d/hostname.sh<br />
   −
== Use network time server (NTP) ==
+
==Use network time server (NTP)==
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
sudo systemctl start systemd-timesyncd
 
sudo systemctl start systemd-timesyncd
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With the following content:
 
With the following content:
 
  <nowiki>
 
  <nowiki>
    # Disable power management
+
    # Disable power management
    options 8192cu rtw_power_mgnt=0</nowiki>
+
    options 8192cu rtw_power_mgnt=0</nowiki>
 
Then reboot. And it's done.
 
Then reboot. And it's done.
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When Raspberry Pi is using a HDMI-VGA adapter is necessary to add an extra configuration in config.txt file (It must be located in boot partition directory but If it does not exist you need to create it). Add next lines at the begining of the file.
 
When Raspberry Pi is using a HDMI-VGA adapter is necessary to add an extra configuration in config.txt file (It must be located in boot partition directory but If it does not exist you need to create it). Add next lines at the begining of the file.
 
  <nowiki>#HDMI-VGA Configuration
 
  <nowiki>#HDMI-VGA Configuration
    hdmi_force_hotplug=1
+
    hdmi_force_hotplug=1
    hdmi_group=2
+
    hdmi_group=2
    hdmi_mode=16
+
    hdmi_mode=16
    hdmi_drive=2</nowiki>     
+
    hdmi_drive=2</nowiki>     
    
This setting will force a screen size of '''1024x768 60 Hz'''. Although the screen does not support the new setting will work.
 
This setting will force a screen size of '''1024x768 60 Hz'''. Although the screen does not support the new setting will work.
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  pip install Pillow
 
  pip install Pillow
 
  <nowiki>accepted
 
  <nowiki>accepted
   
+
   
   
+
   
    You have to re-install PIL and also install the needed libraries as well as link them manually. This answer is based on this blog post for a regular ubuntu PIL installation and this askubuntu question, where it is explained how to compile the jpeg encoding:
+
    You have to re-install PIL and also install the needed libraries as well as link them manually. This answer is based on this blog post for a regular ubuntu PIL installation and this askubuntu question, where it is explained how to compile the jpeg encoding:
   
+
   
    ### uninstall PIL
+
    ### uninstall PIL
    sudo pip uninstall pil
+
    sudo pip uninstall pil
   
+
   
    ### download and compile the JPEG library
+
    ### download and compile the JPEG library
    wget http://www.ijg.org/files/jpegsrc.v8c.tar.gz     
+
    wget http://www.ijg.org/files/jpegsrc.v8c.tar.gz     
    tar xvfz jpegsrc.v8c.tar.gz
+
    tar xvfz jpegsrc.v8c.tar.gz
    cd jpeg-8c
+
    cd jpeg-8c
    ./configure --enable-shared --prefix=$CONFIGURE_PREFIX
+
    ./configure --enable-shared --prefix=$CONFIGURE_PREFIX
    make
+
    make
    sudo make install
+
    sudo make install
   
+
   
    ### link the libraries correctly - RASPBERRY PI ONLY
+
    ### link the libraries correctly - RASPBERRY PI ONLY
    sudo ln -s /usr/lib/arm-linux-gnueabi/libjpeg.so /usr/lib
+
    sudo ln -s /usr/lib/arm-linux-gnueabi/libjpeg.so /usr/lib
    sudo ln -s /usr/lib/arm-linux-gnueabi/libfreetype.so /usr/lib
+
    sudo ln -s /usr/lib/arm-linux-gnueabi/libfreetype.so /usr/lib
    sudo ln -s /usr/lib/arm-linux-gnueabi/libz.so /usr/lib
+
    sudo ln -s /usr/lib/arm-linux-gnueabi/libz.so /usr/lib
   
+
   
    ### install rest of the libraries, as well as freetrype and zlib
+
    ### install rest of the libraries, as well as freetrype and zlib
    sudo apt-get install libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev
+
    sudo apt-get install libjpeg-dev libfreetype6 libfreetype6-dev zlib1g-dev
   
+
   
    ### re-install PIL
+
    ### re-install PIL
    sudo pip install pil</nowiki>
+
    sudo pip install pil</nowiki>
 
=Send mail from command line=
 
=Send mail from command line=
 
https://www.cyberciti.biz/tips/linux-use-gmail-as-a-smarthost.html
 
https://www.cyberciti.biz/tips/linux-use-gmail-as-a-smarthost.html
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On the boot partition: Edit config.txt to include the following lines...<syntaxhighlight lang="text">
 
On the boot partition: Edit config.txt to include the following lines...<syntaxhighlight lang="text">
 
dtparam=i2c_arm=on
 
dtparam=i2c_arm=on
dtoverlay=w1-gpio
+
dtoverlay=w1-gpio # One wire for sensors sudo systemctl start systemd-timesyncd
dtoverlay=pwm-2chan
+
sudo systemctl enable systemd-timesyncd
 +
dtoverlay=pwm-2chan # Pulse with modulation
 
</syntaxhighlight>
 
</syntaxhighlight>
  

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