Published by the author IT9YBG

RASPBERRY PI 2

welle.io on RaspberryPi 2 (guide)

The first type of transmission in digital coding, the DAB (Digital Audio Broadcasting) proper, provided a bit rate of 128 kbit / s with an MP2 audio codec. Since this codec needed at least 160 kbit / s to achieve the typical quality of FM radio and from 192 to 256 kbit / s to achieve CD quality, it was subject to various criticisms from audiophiles (especially for cutting frequencies above 14 kHz, when instead the FM radio guaranteed a transmission up to 15 kHz)

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Radiosonde reception Trapani Birgi (RaspberryPI)
Setup: RTLSDR V.3 - RaspberryPI2 and image of SQ6KXY-
Antenna 403 Mhz homemade

From TRAPANI Birgi, near my QTH

Video signal radiosonde here

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Voice assistant "Amazon ALEXA" ( Italian ) with Raspberry Pi2

Video here
You follow the installation instructions here

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Connect RaspberryPi to SSH via bluetooth with Android (NO internet o router)

You follow this guide to install everything.

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Monitoring Station FT8 or WSPR with an RTL-SDR V3 / Raspberry Pi 2 and WSJTX

You follow this guide to install everything.

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WSPR on 10 and 6 meters: rx (2 days) with RaspberryPi and Icom IC-R7100 / Antenna: rotative dipole 10/15/20 mtrs

6 meters

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Receive NAVTEX with RaspberryPI / FLdigi and MiniWhip / Date: 03.05.2018

Text:

NNJZCZC OA28

MAGT LADIO OBO MRCC ROME

MRCC ROME RECEAPED INFD REGARDING A BOAT WITH MIGRANTS ON BOARD DEPARTED FROM ZIWQA (LIBYA)

ALL SHIPS TRANSISTING IN THE AREA ARE REQUESTED TO KEEP A SHARP LOOKOUT AND REPORT ANY SIGHTING TO MRCC ROME

TEL "390659084527 - 59084409

FAX "39065922737 - 59084793

INM C:424744220

E-MAIL: ITMRCC'AT'MIT.GOV.IT

NNNN

ZCZC OA26

EASTERN MED SEA - MALTA.

UNDERWATER CABLE OPS BY C/S RAYMOND CROZE FROM 19 APR18 TO 06 MAY18 BOUNDED BY POSNS

35-54.09N 015-20.69E

35-52.32N 015-25.24E

35-50.05N 015-23.49E

35-51.92N 015-18.54E

WIDE BERTH REQUESTED

NNNN

ZCZC OA24

MALTA RADIO OBO MRCC ROME

MRCC ROME RECEIVED INFO REGARDING A BOAT WITH WITH ABOUT 55 MIGRANTS DEPARTED FROM SABRATHA AT 240001Z APR 18

ALL SHIPS TRANSISTING IN THE AREA ARE REQUESTED TO KEEP A SHARP LOOKOUT AND REPORT ANY SIGHTING TO MRCC ROME

TEL "390659084527 - 59084409

FAX "39065922737 - 59084793

INM C:424744220

E-MAIL: ITMRCC'AT'MIT.GOV.IT

NNNN

ZCZC OA21

NTM NO 18 OF 2018

MUNXAR EAST CARDINAL BUOY - UNLIT

TM NOTIFIES MARINERS THAT THE EAST CARDINAL LIGHT BUOY AT OUTER MUNXAR REEF IN POSN 35-50.982N 014-35.940E IS UNLIT. MARINERS ARE ADVISED TO NOTE THE ABOVE AND PROCEED WITH CAUTION AND SLOW SPEED WHEN NAVIGATING IN THE AREA

NNNN

ZCZC OA17

MALTARADIO UNN WRNG

REPAIRS ON CABLE BY VESSEL RAYMOND CROZE WILL START WORKS FROM 19APRIL18 TO 6 MAY18. ALEXANDRIA EGYPT TO PALERMO SICILY, BOUNDED IN POSNS:

POSN1 35-54.089N 015-20.685E

POSN2 35-52.322N 015-25.239E

PBSN3 35'

$.:QTAWEMRIUE

POSN4 35-51.921N 015-18.544E

ALL SHIPS TRANSITTNP THE ARAA ARE TO KKEP A SHARP LOOKOUT.

NNNN

ZCZC OA15

MALTA RADIO

DRILLING RIGS UPDATE

MED SEA S/SE

WRNG 0310/18

ESTRUC.DIDON LAT 33-47.9N LONG 011-53.5E

PRIDE SEA EXPLORER LAT 34-17.6N LONG 011-48.4E

SEA EXPLORER LAT 34-22.5N LONG 011-32.0E

7 NOVEMBER LAT 34-23.0N LONG 012-15.0E

ISIS LAT 34-34.1N LONG 012-31.6E

GSF RIG 135 LAT 35-47.9N LONG 014-28.7E

JACKET LAT 35-55.6N LONG 011-33.2E

PETROSAUDI DISCOVER LAT 36-00.7N LONG 011-59.9E

NNNN

ZCZC OA14

MALTA RADIO

EASTERN MED SEA - TUNISIA EAST C

WRNG 010/18

FIRING EXERCISES TILL 31 DEC 2018 IN AREA BOUNDED BY

PARALLELS: 35-30N 35-40N

MERIDIANS: 011-30E011-50E

NNNN

ZCZC OA13

MALTA RADIO

EASTERN MED SEA TUNISIA EAST

WRNG 169/18

TRANSPORT AND LOGISTIC SUPPORT ARE ENSURED BY VOS PRINCE TO RIG JAWHRA UNTIL 30TH JUNE 2018, IN THE VICINITY OF 35-55.5N 011-33.2E.

1000 METERS BERTH REQUESTED.

NNNN

ZCZC OA10

SECURITE SECURITE SECURITE,

ALL SHIPS.

A BRIGHT ORANGE SPHERICAL OBJECT( SIZE OF A LIFERAFT) WAS REPORTED IN WATER AND IT SEEMS TO BE HAZARD FOR NAVIGATION.THE POSITION REPORTED WAS BETWEEN 35-32.00N 015-47.00E AND 35-29.00N 015-32.00E. SHIPS TRANSITTING THIS AREA ARE TO KEEP SHARP LYOU FOR THIS OBJECT.

NNNN

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Tutorial WSPR reception band change with RaspberryPi and dongle RTL-SDR V.3

This tutorial is also on the official blog RTL-SDR.com

Install WSPRD on your RaspberryPI, for now ,I would recommend Raspian Wheezy

Tips (for Raspberry Pi)

-Use ferrite bead to limit the interference - Cut off the display (could help to reduce QRN) :

/opt/vc/bin/tvservice -o

Remove unused modules

/etc

sudo nano modules

#snd-bcm2835

You create new text file in / home / pi of the RaspberryPi and paste this script into it.

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#!/bin/bash
#
# # # # Edit following variable with your correct data # # # #
call="put your call"
gain="-a 1"
locator="put your locator"
hz="14.0956M"
info_rx="Start reception 20 meters"
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ##
sleep 1
pgrep rtlsdr_wsprd > /dev/null 2>&1
if [ $? -eq 0 ]; then
echo $'\n'"---Kill rtlsdr_wsprd pid---" >> /home/pi/Desktop/wsprd
killall rtlsdr_wsprd &>> /home/pi/Desktop/wsprd
fi
echo $'\n'"$(date)" >> /home/pi/Desktop/wsprd
echo "$info_rx"$'\n' >> /home/pi/Desktop/wsprd
sleep 1

/home/pi/rtlsdr-wsprd/rtlsdr_wsprd -f "$hz" -c "$call" -l "$locator" "$gain" -d 2 &>> /home/pi/Desktop/wsprd &

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You create other equal files by changing only the reception frequency and then make the files executable with chmod +x

The script was created to put a log file on the Desktop of the Raspian operating system called wsprd. If you want to change the path, you change it in the script.

Now you go to the terminal and type: sudo crontab -e

Here put the band change times

...meaning of the contab -e (reception band change times)

07:00/13:00 receive 20 meters
13:00/16:00 receive 30 meters
16:00/17:00 receive 20 meters
17:00/21:00 receive 30 meters
21:00/23:00 receive 40 meters
23:00/02:00 receive 80 meters
02:00/07:00 receive 40 meters

Open the terminal and write: ./20m and so the 20 meters script starts, at the set time the frequency changes automatically. After you can also close the terminal. To stop the WSPRD process you write:

killall rtlsdr_wsprd

Thank's also to Biagio IT9FDP

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Rx WSPR to 0474.2 Mhz