Android Applications

Last Updated or created 2024-02-21

Today i talked about creating apps for mobiles with a colleague.

I made me wonder what programming IDE i’ve used in the past.

Things i’ve made:

  • clog killer – a game application i made while working at a job.
    It was the name of a process on our servers we all hated.
    It was slow and messed up your terminal.
  • Webled – have to install this one again, to see what its purpose was 🙂
  • Whistle hole calculator – When making your own tinwhistle/lowwhistle you had to calculate diameters and positions.
    I will make another post about this.
  • Made a Multiple-Choice Quiz tool, for learning Iai-do positions/terminology. (Japanese Martial Arts – See other posts)
  • A iscp Onkyo controller (see post about my web controller)

Tools used:

  • Android IDE
  • App inventor
  • ??
  • And mobile applications using html5, php, css3 and jquery mobile

App ideas, not started or not completed:

  • Game for blind people (Or people who are bored out of their skull going to meetings)
    It involves a evolving maze game on a black screen, you have to remember the way. Hitting a wall, buzzz .. dead, start all over again.
    So you can hold your phone under the table or behind your back.
    (Black screen and no sound, just the little vibrating thinghy.)
  • New way to select app’s using a widget.
  • Pull down search game. (Have to look at the source again, i forgot what i did)

Downloads and screenshots:

I’ll post more/better examples


Reversed engineered a tool found on a ‘hackers’ phone.
Apparently it was a security test setup nobody was aware of.
I was able to find urls and domains where some call-home functionality was involved.

Garden mapping using triangulation

Last Updated or created 2024-02-21

Inkscape and some measurements.
Use some control points to check for deviation.
Choosing bigger distances gives greater accuracy!
Add radius of trees to your measurements

Inkscape gives you length and angle degrees.
Check your measurements :

Home Assistant versus Domoticz

Last Updated or created 2022-04-29

After many years Domoticz, tried Home Assistant … again.
Going to test this instance, running on a NUC, besides my production setup. Time will tell.

  • HACS installed.
  • Node-red connection
  • Zoneminder
  • 2022-03-30 : Nextcloud snapshot backup, Mushroom Cards/Theme
  • 2022-04-04: Great tip by dkorbee .. Esphome

I’ve got a RFXCOM connected to my domoticz, and i wanted to share my 433Mhz devices also in HA, so i configured ser2net.

On domoticz server

apt-get install ser2net

10001:raw:0:/dev/ttyUSB0:38400 NONE 1STOPBIT 8DATABITS max-connections=3
to /etc/ser2net.conf

Better is using by-id instead of ttyUSB

Find yours 
find /dev/ -type l -iname *RFX*



  • disable RFXCOM in hardware
  • stop domoticz
  • systemctl enable ser2net –now
  • check port with ss or netstat
  • start domoticz
  • and CHANGE hardware type from RFXCOM-USB to RFXCOM RFXtrx over lan (using port 10001)


Home Assistant

Add intergration “RFXTRX” , select LAN, input your domoticz IP and port 10001
Takes a while to populate the devices.

I’ve still have to find a way to add a second RFXCOM


IP Blocked fix (Locked myself out .. Remove contents in this file.)

Using SSH

➜  ~ find / | grep ip_ban   
➜  ~ vi /config/ip_bans.yaml 

Biltong again

Last Updated or created 2023-11-03

In 2020 i made a Biltong drying thingy, using a Nextion and a Arduino.
Today i’m preparing for some Chilli Biltong, which i’m going to put in the drying box tomorrow.

2020 Version 1, now version 3 (no more display bugs)

Arduino functionality

  • Heating light
  • Temperature / Humidity
  • Air flow
  • MQTT to home automation
  • Nextion Display


1 kg Beef Cut into 1.5cm - 2cm steak slices

2 tbsp black pepper coarsely ground.
2 tbsp course Sea Salt
1/2 tbsp smoked paprika
4 tbsp coriander seeds roasted and coarsely ground.
1 tbsp chili flakes

50 ml worcestershire sauce
100 ml apple vinegar
1 tbsp tabasco sauce

Script – get images from Reolink cam

while true; do
wget "http://ip.number.or.hostname/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=123asd&user=admin&password=MYSECRETPASS" -O $(date +%Y%m%d%H%M).jpg
sleep 60

Script to generate MP4 (60fps)

cat *.jpg | ffmpeg -f image2pipe -r 60 -vcodec mjpeg -i - -vcodec libx264 out.mp4
Part of Grafana log

20 years

Last Updated or created 2023-07-18

I’ve took it offline, maybe someone wants the source code and database.

It was much fun, time to move on.

UPDATE: 20230228 – It is online again.
(I’ve got some mails and mentions in music forums)

Apparently still a lot of visitors last year
Above example is not showing book covers

At least i’ve got some nice reactions

I’ve create my own bww/bwm to parsons code convertor.
Rest of the website is php, mysql … first one started in 2001 using php3, until php7.

Wow i found a screenshot from one if the first mobile versions!

PARSONS CODE: OMG, you don’t know how long I have been waiting for a search engine to find tunes in my head. I thought about creating some kind of dictionary based on theme notes, or searching through bww files for sequences. What a thrill to find your site. I just hum a tune, use the up, down, repeat letters and… like magic the title is found. You are a genius. I will never be stumped for a title again. Thanks so much, John

Other successes i’ve heard of are: 2 Youtube movies being identified, a nameless bww file and mp3’s

Mail from Dave:


My name is Dave Mason. I put a few tunes together a few years ago called "Tummle Yer Wilkies" which, I see, gets mention on your website. However, I see that you're not sure where people can access the tunes.

Well, the book is free to download from and I hope to have volume 2, "Tummle Yer Wilkies Too!" uploaded in the near future.

Dave Mason

Geneva, Switzerland.

NEW - Palm version by Andreas Joebges (updated)
Added stuff changed software
Added parts in booklist and search.
Additions to
Many additions by: Chris MacKnight
Palm version by Andreas Joebges
Added index send by : Henning
sat 14 feb: Installed DB on macbumm's site
sun 15 feb: Made some changes, limit search and layout
            Removed own collections from DB 
            Expanded statspage with jig/hornp/march/etc.
mon 16 feb: Imported College of Piping index i got from Ralf .. (thanks!)  
            Imported Irish Tunes for Warpipe
            Added Log, Fixed Members Login for edit purposes
tue 17 feb: Layout, testing new functions
wed 18 feb: Imported Bagpipe Music - John MacFadyen
thu 19 feb: Uploaded some Book Covers, 
            programmed a export-to-xls function, so you can use the
            DB data yourself (bottom of booklist pages) 
            Imported Gordon Highlanders Vol 1
sat 21 feb: Fixed m?c and l*ken search
            Imported Gordon Highlanders Vol 2
            Added AKA search
            Old search request stays in search field
            Added some covers
            code cleanup
mon 23 feb: Fixed bookcover popup
            Imported Mark Saul Vol I 
            Uploaded Mark Saul Cover II and changed faulty cover other Vol
            Bookinfo added ISBN, Price, etc.  Suggestion i got by Email
            Uploaded Queens Own Highlanders The Pipers Day  
            Imported Seaforth Highlanders - Standard Settings
thu 26 feb: DB cleanup
            Added Code
            Imported Donald MacLeod vol 1 2 and 4
fri 27 feb: 1st editor assigned - Henny Barnhoorn 
sat 28 feb: Imported Vol 5 and 6 Donald MacLeod 
sun 29 feb: CD Information added
            2nd editor - Coline Gerritsen
mon 01 feb: Added CDs .. Thanks Coline
            Gordon Highlanders Book 1 checked/added/etc. by Henny .. thanks
            CD displaying code changed
            Imported Robert Mathieson Book 4  (now over 4000 tunes in DB!)
fri 05 mar: Added CDs
            Altered ShowCD Code
sun 07 mar: Imported some books (NOW 50!)
            Henny Completed reediting Gordon Highlanders Vol2
            Add MP3 clip code in cdinfo
mon 08 mar: Imported book
            Fixed image caching for faulty browsers
            Search finds composers also
            Fixed Menu structure
            Added Templates
tue 09 mar: Added link under advanced search - find ALL harmonies. :)
wed 10 mar: Added book with cover + MP3 sample
thu 11 mar: Imported Piob. CD
            Added edit icon help 
fri 12 mar: Find tunes on CD in beta test .. :)
            (click search -> advanced .. enter a keyword, mark the media
            checkbox and click search .. CDs found at bottom of page .. :) 
sat 13 mar: Imported another filled-in cd-template :)
            Added some covers
wed 17 mar: Added 15 Piobaireachd Society Volumes
sat 20 mar: Added 3 CD's
tue 23 mar: Added several books (5166 tunes now!) Thanks John 
thu 25 mar: Changed code, checked book, imported book
tue 30 mar: Uploaded covers, edited book (Murray Blairs) and added books 
tue 06 apr: Uploaded Covers, Added books, Changed code
sat 17 apr: Imported some books, added parts to export-excell
            (will be in search later)
            Henny checked/edited some books
tue 20 apr: Imported books, testing query caching for speed improvement.
            (yes getting kindda large .. this thingy)
thu 22 apr: 100! BOOKs!
--missing log--
Added book, covers e.t.c.
sun 11 jul: Added Battlefield Book (thanx Markus)
mon 11 jan: Added 2 books (thanx again Markus)
  • 159 Books
  • 9868 Tunes
  • 1047 Air’s
  • 1315 Jigs
  • 638 Hornpipes
  • 3352 Marches
  • 489 Piob’s
  • 1586 Reels
  • 844 Strathspeys

My Electronics Lab

Last Updated or created 2022-12-01

Update: 20220829 – Microscope G1200

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Bought some boxes for chips


Last Updated or created 2022-06-12

Fun .. but do i need it?

HackRF One

HackRF One from Great Scott Gadgets is a Software Defined Radio peripheral capable of transmission or reception of radio signals from 1 MHz to 6 GHz. Designed to enable test and development of modern and next generation radio technologies, HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation.

  • 1 MHz to 6 GHz operating frequency
  • half-duplex transceiver
  • up to 20 million samples per second
  • 8-bit quadrature samples (8-bit I and 8-bit Q)
  • compatible with GNU Radio, SDR#, and more
  • software-configurable RX and TX gain and baseband filter
  • software-controlled antenna port power (50 mA at 3.3 V)
  • SMA female antenna connector
  • SMA female clock input and output for synchronization
  • convenient buttons for programming
  • internal pin headers for expansion
  • Hi-Speed USB 2.0
  • USB-powered
  • open source hardware

I’ve got dvb alternative below now. Hackrf cannot be bought anymore

Gemini PDA

Android / Linux PDA


The Altair 8800 is a microcomputer designed in 1974 and based on the intel 8080 CPU. Using only switches to program and leds for output.
Even my DIY build computer has a hex keyboard input and 7segments display.

Omnicharge 20+ Usb C Wireless Power Bank 20,000mAh Power Delivery 3.0 + Quick Charge 3.0

You can use this as a mobile soldering station using a TS100 soldering iron.

Rigol Oscilloscope DS1054

SDCard reader for C64 and other commodore machines

Got this one now, superb. Will post about this

 Tv Stick Dab Fm Dvb-t RTL2832 R820T Sdr RTL-SDR Dongle Stick Digitale Tv Tuner Ontvanger TVSDVBS816

Update : got this one, review later on.

Clear case for amiga and tank mouse