Raspberry Pi, GPS and NTP

To be added …..

Requirements:

  • Raspberry PI II
  • Raspbian Jessie
  • NTP Source
  • GPSD
  • ADA-2324 – Adafruit Ultimate GPS HAT voor RPi 2 / A+ / B+ – Mini KitGPSD

Sources:

http://www.talkunafraid.co.uk/2012/12/the-ntpi-accurate-time-with-a-raspberry-pi-and-venus638flpx/

http://www.worldtimesolutions.com/support/ntp/Debian_Lenny_Linux_PPS_support_for_ntpd.html

http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html

http://mythopoeic.org/pi-ntp/

https://forums.adafruit.com/viewtopic.php?f=19&p=369771

 

ADS-B with dump1090

Automatic dependent surveillance – broadcast (ADS–B) is a cooperative surveillance technology in which an aircraft determines its position via satellite navigation and periodically broadcasts it, enabling it to be tracked. The information can be received by air traffic control ground stations as a replacement for secondary radar. It can also be received by other aircraft to provide situational awareness and allow self separation.

source: Wikipedia Automatic dependent surveillance – broadcast

Requirement for receving ADS-B information

  • FM+DAB USB DVB-T RTL2832U+R820T w/ MCX antenna
  • Rasperry Pi II
  • Raspbian Jessie
  • dump1090

Follow the How-to dump1090 to install and configure the software. All together it will take not more then 15 – 30 minutes.

Dump1090
Dump1090

After starting the daemon via the command you can reach the gui via http://server:8080.

dump1090 –interactive –net –no-fix –net-ro-size 500  –net-ro-rate 5

With the standard DVB-T antenna the maximum reach seems to be 50 kilometers. I will order a optimized antenna (1090 Mhz) or create one too increase the reception range.

Secure Internet Service (TLS/SSL)

Self-signed certificates makes it possible to have secure communication without the cost for paying for (public) signed CA certificates. The disadvantage  is that  the certificate cannot be verified on client devices.

Sometimes the certificate can be installed in the local certificate store, but this is something that has to be done on every device. Not user friendly and especially risky.

Too secure my internet services I bought certificates by sslcertificaten.nl and versio.nl.

Use google too find the How-to manuals for installing the certificate for Apache/Nigx and Sendmail/Postfix. Pay attention to include the intermediat certificates in the chain.

You can verify the implementation of TLS/SSL with the following online SSL Tools.

Check Unsecure content via HTTPS
Check HTTPS Server
Check SMTP Server