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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for February 13th, 2019

VCL Root units

Posted by jpluimers on 2019/02/13

Delphi VCL units that are not using any other VCL units:

  • Vcl.Bind.Consts
  • Vcl.Consts
  • Vcl.ComStrs
  • Vcl.HtmlHelpViewer
  • Vcl.IdAntiFreeze
  • Vcl.Imaging.GIFConsts
  • Vcl.Imaging.JConsts
  • Vcl.Imaging.pnglang
  • Vcl.OleConst
  • Vcl.ShellAnimations
  • Vcl.Shell.ShellConsts
  • Vcl.Touch.GestureConsts
  • Vcl.Touch.KeyboardTypes
  • Vcl.VDBConsts
  • Vcl.XPMan


Posted in Delphi, Development, Software Development | Leave a Comment »

Accessing storage (NAS) over the Internet via FTP | FRITZ!Box 7490 | AVM International

Posted by jpluimers on 2019/02/13

Of course you don’t want this. So by the time you read this, the connection has been closed.

For testing some Internet of Shit stuff from a client that cannot do SFTP, I needed a temporary FTP accessible connection.

These links helped:


  1. Preparing the USB stick:
    1. Ensure the USB disk is FAT/FAT32/NTFS
    2. Create a directory in the root of the USB disk for the FTP user (for now: FtpDirectory)
    3. Insert the USB disk in the Fritz!Box
  2. Logon to the Fritz!Box web UI
    1. Configure a user for FTP:
      1. In the menu, go to System, then FRITZ!Box Users
      2. Click Add user
      3. Name the user (for now: MyFtpUser)
      4. Ensure that user *only* has a checkmark for `Access to NAS contents`
      5. Click the button Add directory
      6. In the popup click Select folder
      7. Choose the FtpDirectory you just made
      8. Click OK
      9. Ensure the read and write checkboxes are enabled
      10. Click OK
    2. Configure the USB stick for FPT access
      1. In the menu, go to Home Network, then USB Devices
      2. Observe if the device is visible and has the correct file system (if not: ask AVM)
      3. In the menu, go to Internet, then Permit Access
      4. Click on the FRITZ!Box Services
      5. Ensure there is a checkmark at Internet access to your storage media via FTP/FTPS enabled
      6. At TCP Port for FTP/FTPS, fill in 21 (many IoT devices cannot use a different port)
      7. Ensure there is *no* checkmark at Allow only secure FTP connections (FTPS)
      8. Make a note of the value after FTP address (something like`)
      9. Click Apply
  3. Test


Posted in Communications Development, Development, Fritz!, Fritz!Box, FTP, Internet protocol suite, IoT Internet of Things, Network-and-equipment, Power User, Software Development, TCP | Leave a Comment »

web based tools to simulate electronics

Posted by jpluimers on 2019/02/13

Via seedstudio, I bumped into EasyEDA – Wikipedia. It seems there are a lot of on-line tools that allow you to draw and often simulate electronics.

Time to put them on my list of stuff to play around with:

Circuitlab also has a nice free interactive book: [WayBack] “Ultimate Electronics” Book – CircuitLab A free interactive electronics textbook, “Ultimate Electronics”

Later – via issue #1 of [WayBack] HackSpace magazine: The new magazine for the modern maker – I also found out about Fritzing which is off-line native software that I want to check out as it is open source:

[] Fritzing

It helps a lot knowing there are various Electronic symbol – Wikipedia: Standards for symbols, covering much more than the one below:

To make it easier, power supplies have a host of different symbols for the same things. For instance, DC can have 3 or more different symbols. [WayBack] Electric Current Symbols


Posted in Development, Hardware Development | Leave a Comment »

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