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    Dennis van Velzen

    @Dennis van Velzen

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    Best posts made by Dennis van Velzen

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    Latest posts made by Dennis van Velzen

    • RE: My sensorboard MYS 1.0beta

      Nice board... Simple and straight forward to implement in our own projects!
      I also like to have approx. 5 boards... Please tell me how to order and how you like the payment...

      Can you also include the RF24's and Arduino boards? 👍

      posted in Hardware
      Dennis van Velzen
      Dennis van Velzen
    • RE: Data logging Options

      MQTT would indeed be a good solution for this.
      Together with Node JS, raspi, mysql, ngnix....

      More information I want to share from my personal favorites: http://blog.hekkers.net/2014/02/26/home-automation-with-node-js-mqtt/

      posted in Vera
      Dennis van Velzen
      Dennis van Velzen
    • RE: Security

      Ok ok... I am involved with some IT security on daily basis. Like programming low level, did some logic analyzing, assembly of electronics and certainly will order a couple of these RF modules to integrate them in my upcoming HA project.

      So If I have the parts here I will take a look at security and I fitting some simple additional security layer. Or maybe just introduce some intrusion logic. To be continued I will watch this topic regularly...

      posted in General Discussion
      Dennis van Velzen
      Dennis van Velzen
    • RE: Security

      Okay, I agree... but this discourages me somehow to use this wireless product as a HA solution. Like for example KAKU (klik aan uit) a one way wireless product operating at 433MHz, mainly for dimming and switching appliances and widely used in The Netherlands implemented an easy hashing solution which makes it a little less "funorable" for somebody to control your appliances...

      Just thinking in a simple fast solution... for this...

      posted in General Discussion
      Dennis van Velzen
      Dennis van Velzen
    • RE: Sensor Node V2.0

      Nice PCB design...

      Suggested boards:

      • 4 PWM logic FETs (dimming RGB W LED strips, 12V lights) Some FETs are easily capable of doing 8 amps and have almost no excess heat.
      • 230V AC triac dimmer module (200w that fits in a EU wall box) EU net frequency.
      • 0-10V input module (that fits behind a 0-10V dimmer in a wall box. Round max 60mm, thick approx. 15mm) power from 230VAC line.
      • 0-10V output module.
      • 1..4 channel opto input 3-250v module.
      • 1..2 channel solid state relay module.

      Can add nice usable parts, example schema's later... main goal good/better cheap(er) open source products!

      posted in Hardware
      Dennis van Velzen
      Dennis van Velzen
    • RE: Security

      I think AES is the way to go...

      https://github.com/qistoph/ArduinoAES256

      Otherwise here's a list with cycle information:

      http://www.das-labor.org/wiki/AVR-Crypto-Lib/en

      posted in General Discussion
      Dennis van Velzen
      Dennis van Velzen