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APRS with airspyhf_rx, csdr, and direwolf

1200bps 144.660MHz

# Choose 11025Hz for the intermediate IF/audio frequency
airspyhf_rx -f 144.66 -a 768000 -r stdout | \
  csdr fir_decimate_cc 69.65986394557823129252 0.005 HAMMING | \
  csdr fmdemod_quadri_cf | csdr limit_ff 0.5 | csdr deemphasis_nfm_ff 11025 | \
  csdr fastagc_ff | csdr limit_ff 0.5 | csdr convert_f_s16 | \

/usr/local/bin/direwolf -c ~/bin/sdr-1200bps.conf -t 0 -T "%FT%TZ" -r 11025 -D 1 -B 1200 -

Vegas is the last place I ever expected to visit. And yet, I wound up tucking myself into the corner of the Wireless Village for three days, absorbing excellent talks on the state of wireless hackery. Though I hadn't planned to try any of the challenges, I got drawn into @dntlookbehindu's (aka Russ) "SDR Roulette".

Russ purchased a dog collar to analyze the wireless communication between remote

Tinder API documentation

Note: this was written in April/May 2014 and the API may has definitely changed since. I have nothing to do with Tinder, nor its API, and I do not offer any support for anything you may build on top of this. Proceed with caution

http://rsty.org/

I've sniffed most of the Tinder API to see how it works. You can use this to create bots (etc) very trivially. Some example python bot code is here -> https://gist.github.com/rtt/5a2e0cfa638c938cca59 (horribly quick and dirty, you've been warned!)

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

	`default_nettype none

	module top(input CLK, output PIN_24);
	wire tx_buf_empty;
	reg tx_data_ready;
	reg [7:0] tx_data;

	uart_tx #(
	.BAUD_DIVISOR(16000000 / 115200)
	) uart_tx_inst (

	#!/bin/bash

	# This script allows you to chroot ("work on")
	# the raspbian sd card as if it's the raspberry pi
	# on your Ubuntu desktop/laptop
	# just much faster and more convenient

	# credits: https://gist.github.com/jkullick/9b02c2061fbdf4a6c4e8a78f1312a689

	# make sure you have issued

	<?xml version='1.0' encoding='utf-8'?>
	<?grc format='1' created='3.7.9'?>
	<flow_graph>
	<timestamp>Tue Jul 22 14:34:09 2014</timestamp>
	<block>
	<key>options</key>
	<param>
	<key>author</key>
	<value></value>
	</param>

	curl --include \
	--no-buffer \
	--header "Connection: Upgrade" \
	--header "Upgrade: websocket" \
	--header "Host: example.com:80" \
	--header "Origin: http://example.com:80" \
	--header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
	--header "Sec-WebSocket-Version: 13" \
	http://example.com:80/

	#include <complex.h>
	#include <stdio.h>
	#include <stdlib.h>

	// rtlsdr-to-gqrx Copyright 2014 Paul Brewer KI6CQ
	// License: GNU GPL 3.0
	//
	// IQ file converter for Software Defined Radio Programs rtl_sdr, gqrx
	// from rtl_sdr recording format -- interleaved unsigned char
	// to gqrx/gnuradio .cfile playback format -- complex64