darksidelemm

<?xml version='1.0' encoding='ASCII'?>
<?grc format='1' created='3.7.5'?>
<flow_graph>
  <timestamp>Mon Oct  6 18:28:35 2014</timestamp>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>samp_rate</value>
    </param>

darksidelemm

UPGRADING RPI3 TO RASPBIAN STRETCH
-----------------------------------

Follow guide to upgrade from Raspbian Jessie to stretch:
    https://linuxconfig.org/raspbian-gnu-linux-upgrade-from-jessie-to-raspbian-stretch-9

As of July 2017, Wifi will break when you upgrade.
Revert to an older wifi firmware using:
> wget http://archive.raspberrypi.org/debian/pool/main/f/firmware-nonfree/firmware-brcm80211_0.43+rpi4_all.deb

darksidelemm

RS41 10-way 2mm pitch header
----------------------------


______________________|           |______________________
|                                                       |
|   9           7           5           3           1   |
|                                                       |
|   10          8           6           4           2   |
|_______________________________________________________|

darksidelemm

Running a 2m SatNOGS Ground Station? How about turning it into an APRS SatGate!

The idea is we tap off audio received by the fm_demod.grc flowgraph (compiled to satnogs_fm_demod.py) and feed this into Direwolf (an AFSK soundmodem). Direwolf runs constantly, and attempts to process received data whenever the FM demod flowgraph runs (which is basically for all observations except BPSK, APT, and CW). The CPU overhead of direwolf is minimal - I've been able to run it on a RPi3 without overruns. 

MODIFICATIONS TO fm_demod.grc
-----------------------------
Edit fm_demod.grc in gnuradio-companion. If you're feeling masochistic, you can X-forward this from the ground station machine.

Add in a Float-to-Short Block, and a UDP sink.
Set the Float-to-Short block to have a scaling factor of 32767.

darksidelemm

LTE-Cell-Scanner under Raspbian (and maybe Ubuntu/Debian)

Mark Jessop vk5qi@rfhead.net 2017-11-19

Here in VK-land, GSM is dying, if not already dead in many parts of the country. As such, RTLSDR calibration tools like kalibrate-rtl are not particularly helpful! However, thanks (mainly) to Telstra, we have a very wide coverage 4G (LTE) network on 'Band 28', which is in a good frequency range for use with a RTLSDR (Downlink band 758 – 803 MHz). LTE-Cell-Scanner provides the 'CellSearch' utility, which will search for LTE cells, and determine the RTLSDR's clock offset. This gist attempt to provide some sort of guide on getting CellSearch running under Raspbian.

darksidelemm

#!/usr/bin/env python
#
#	Fake rigctld listener.
#	Hacked together in 10 minutes.
#
#	Mark Jessop <vk5qi@rfhead.net>
#

import socket
import datetime

darksidelemm

#
#  BOM JSON Observation to APRS Uploader
#
#  Mark Jessop <vk5qi@rfhead.net>
#  2018-01-06
#
#	This is intended to be run as a regular (5-10 minute) cron job.
#	Update the JSON feed, APRS_CALL, APRS_PASSCODE, and WX_CALL Fields below before using.
#
#	A link to the single-station observation JSON feed can be found at the bottom of an observation page,

darksidelemm

#!/usr/bin/env python
#
#   FreeDV Sync Notification Script
#
from __future__ import print_function
import argparse
import smtplib
import socket
import sys
import time

darksidelemm

#!/usr/bin/env python
#
# Radiosonde Auto RX Tools
# Log-to-KML Utilities
#
# 2018-02 Mark Jessop <vk5qi@rfhead.net>
#
# Note: This utility requires the fastkml and shapely libraries, which can be installed using:
# sudo pip install fastkml shapely
#

darksidelemm

#!/usr/bin/env python
#
#	Habitat Radiosonde Cleanup Utility
#
#	Mark Jessop 2018-11
#
#	Search for payload configuration documents which have been automatically generated by 
#	radiosonde_auto_rx. Eventually, delete the ones that are older than X weeks.
#
import couchdb