Mike m1ari

m1ari / Notes.md

Last active February 10, 2021 07:35

EverGreenCoin - Manual Staker Image

Create User

sudo useradd -d /var/lib/evergreencoin -c 'EverGreenCoin Wallet Daemon' -r -s /usr/sbin/nologin evergreencoin`

Create Storage

sudo mkdir /var/lib/evergreencoin

Install Libraries and Tools

m1ari / ukhasnet packet length

Created May 13, 2016 15:36

	ukhasnet-prod1=# select length(packet),count(*) from ukhasnet.upload group by length;
	length \| count
	--------+---------
	1 \| 53
	2 \| 33
	3 \| 468
	4 \| 1727
	5 \| 552
	6 \| 504
	7 \| 658

m1ari / gist:3d6c76dae8383aa94eca

Created March 10, 2016 11:37

ukhasnet data types (DB)

	ukhasnet-prod1=# select * from ukhasnet.fieldtypes;
	id \| type \| name \| dataid
	----+----------+--------------------+--------
	1 \| Float \| Temperature \| T
	2 \| Float \| Voltage \| V
	3 \| Float \| RSSI \| R
	4 \| Float \| Pressure \| P
	5 \| Float \| Humidity \| H
	6 \| Location \| Location \| L
	7 \| Float \| Sun \| S

m1ari / gist:2a19a3b04996dcba0cd0

Created May 9, 2014 20:41

.screenrc

	hardstatus alwayslastline "%{yb} %H %{c.} \| %w %= \| %{yb} %c:%s %Y-%m-%d %{c.} \| %l"
	termcap xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
	terminfo xterm 'is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l'
	defutf8 on
	utf8 on on

	term xterm
	vbell off

m1ari / RPI Streaming notes

Last active January 20, 2023 13:32

Stream raspberry pi camera over multicast and cope with raspivid exiting

	This requires a couple of windows (or a screen/tmux session)

	First create a fifo to use
	mkfifo video.h264

	In the first window start raspivid in the following way
	while true; do raspivid -n -vf -hf -w 460 -h 270 -b 512000 -t 36000000 -o video.h264 -v; done

	In the second window start vlc like:
	cvlc video.h264 --sout "#duplicate{dst=std{access=udp,mux=ts,dst=239.255.1.2:1234}}" :demux=h264 --ttl 4 -I http --sout-keep -v --loop

m1ari / serialread.c

Last active December 25, 2015 09:29

serial read with statemachine.

	#include <stdio.h>
	#include <string.h>

	/* On Linux systems you might need to run the following command first to
	* stop the system buffering until a newline:
	* stty -icanon
	*/

	void main (){
	char NMEA_string[70] = "";

m1ari / batc_chat.pl

Created September 19, 2013 11:14

Short perl script to show BATC chat in a console window

	#!/usr/bin/perl -w
	use strict;
	use LWP::UserAgent;
	use HTTP::Request::Common qw(GET);

	# Channel is the feed number we want the chat for.
	my $channel=1153;

	my $ua = new LWP::UserAgent;
	$ua->cookie_jar( {} );

	ukhasnet-prod1=# select length(packet),count(*) from ukhasnet.upload group by length;
	length \| count
	--------+---------
	1 \| 53
	2 \| 33
	3 \| 468
	4 \| 1727
	5 \| 552
	6 \| 504
	7 \| 658

	ukhasnet-prod1=# select * from ukhasnet.fieldtypes;
	id \| type \| name \| dataid
	----+----------+--------------------+--------
	1 \| Float \| Temperature \| T
	2 \| Float \| Voltage \| V
	3 \| Float \| RSSI \| R
	4 \| Float \| Pressure \| P
	5 \| Float \| Humidity \| H
	6 \| Location \| Location \| L
	7 \| Float \| Sun \| S