{"id":218,"date":"2017-12-29T12:08:57","date_gmt":"2017-12-29T12:08:57","guid":{"rendered":"http:\/\/lora.vsb.cz\/?p=218"},"modified":"2022-04-05T17:55:51","modified_gmt":"2022-04-05T17:55:51","slug":"building-rpi-gateway","status":"publish","type":"page","link":"https:\/\/lora.vsb.cz\/index.php\/building-rpi-gateway\/","title":{"rendered":"Building Lora@VSB TTN gateway with RPi & iC880a in 7 steps (legacy)"},"content":{"rendered":"

Used HW: Raspberry-Pi2B<\/a> & iC880a SPI<\/a><\/strong><\/p>\n

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Step 1: Prepare image to SD card
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Download the latest Raspbian-lite image<\/a>, format SD card and install image to it as usual.<\/p>\n

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Step 2: Customise OS
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Run RPI, login as default user „pi“ (default passwd „raspberry“) and customise OS:<\/p>\n

Step 2.1:<\/strong> update OS:<\/h5>\n
# rpi-update\r\n# apt-get dist-upgrade\r\n# apt-get update\r\n# rpi-update<\/pre>\n
Step 2.2: delete default user PI:<\/strong><\/h5>\n
# adduser <new-user>\r\n# deluser pi<\/pre>\n
Step 2.3:<\/strong> install Persistent IPtables:<\/strong><\/h5>\n
# apt-get install iptables-persistent\r\n# vi \/etc\/iptables\/rules.v4\r\n<\/pre>\n
This is an example of file rules.v4:<\/p>\n
# Generated by iptables-save v1.4.21 on Thu Feb 16 18:14:59 2017 \r\n*filter \r\n:INPUT DROP [0:0] \r\n:FORWARD ACCEPT [0:0] \r\n:OUTPUT ACCEPT [0:0] \r\n-A INPUT -i lo -j ACCEPT \r\n-A INPUT -p tcp --dport 22 -m state --state NEW -j ACCEPT \r\n-A INPUT -p udp --dport 1700 -m state --state NEW -j ACCEPT \r\n-A INPUT -j ACCEPT -m state --state ESTABLISHED,RELATED \r\nCOMMIT\r\n<\/em><\/pre>\n
Step 2.4:<\/strong>\u00a0<\/em>set NTP time: <\/strong><\/h5>\n
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  1. Go to http:\/\/support.ntp.org\/bin\/view\/Servers\/NTPPoolServers<\/a> and click the host name corresponding to your area. Assuming the area is North America, the servers are:\n
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      server 0.north-america.pool.ntp.org\r\n  server 1.north-america.pool.ntp.org\r\n  server 2.north-america.pool.ntp.org\r\n  server 3.north-america.pool.ntp.org\r\n<\/pre>\n<\/div>\n<\/li>\n
  2. Open \/etc\/ntp.conf in a text editor. If you use the nano editor, run sudo nano \/etc\/ntp.conf<\/li>\n
  3. You should see a list of servers similar to the one below, replace the servers with the ones from step 1::\n
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    server 0.cz.pool.ntp.org iburst\r\n server 1.cz.pool.ntp.org iburst\r\n server 2.cz.pool.ntp.org iburst\r\n server 3.cz.pool.ntp.org iburst\r\n<\/pre>\n<\/div>\n<\/li>\n
  4. Comment out (by adding a # in front of the line) the following two lines:\n
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      restrict 127.0.0.1\r\n  restrict ::1\r\n<\/pre>\n<\/div>\n<\/li>\n
  5. Save the file and exit<\/li>\n
  6. Set the correct time zone by running # sudo cp \/usr\/share\/zoneinfo\/US\/Pacific \/etc\/localtime. Replace US\/Pacific with your time zone. If you are not sure about the possible values, look in \/usr\/share\/zoneinfo<\/li>\n
  7. Restart the ntp server: sudo \/etc\/init.d\/ntp restart<\/li>\n
  8. Run date<\/code> in a terminal<\/li>\n
  9. If the time is not correct, you might have to force update it. This is because, by default, ntp<\/code> will not sync if the difference between the system time and the real-time is greater that 1000 seconds. Run sudo ntpd -gq<\/code> and the restart ntp<\/code><\/li>\n<\/ol>\n
     Step 2.5: turn off wifi (if you use RPI3 and dont need it):<\/strong><\/h5>\n
    # iwconfig wlan0 txpower off (if needed tun on: # iwconfig wlan0 txpower auto)<\/pre>\n
    check status:<\/p>\n
    # rfkill list all<\/pre>\n
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    Step 3: Putting it all together <\/strong><\/h4>\n
    Connect the jumper wires between the two boards using the following table:<\/p>\n\n\n\n\n\n\n\n\n\n\n
    iC880 pin<\/th>\nDescription<\/th>\nRPi pin<\/th>\n<\/tr>\n
    21<\/td>\n+5V<\/td>\n2<\/td>\n<\/tr>\n
    22<\/td>\nGND<\/td>\n6 (14, 25)<\/td>\n<\/tr>\n
    13<\/td>\nReset<\/td>\n11<\/td>\n<\/tr>\n
    14<\/td>\nSPI CLK<\/td>\n23<\/td>\n<\/tr>\n
    15<\/td>\nMISO<\/td>\n21<\/td>\n<\/tr>\n
    16<\/td>\nMOSI<\/td>\n19<\/td>\n<\/tr>\n
    17<\/td>\nNSS<\/td>\n24<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    We’re now ready to power up and start configuring our gateway!<\/p>\n
    \"\"\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \"\"<\/p>\n
    If you have a 3D printer, you can use a holder to mount both boards together. Download<\/a>\u00a0 all *.stl<\/em> and *.gcode<\/em> files.<\/p>\n
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    Step 4: <\/strong>Setting up the software<\/h4>\n