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BS2 propeller wireless communication? — Parallax Forums

BS2 propeller wireless communication?

EastBurkeEastBurke Posts: 17
edited 2009-10-14 22:31 in Propeller 1
I am working on a project to control a boe bot wirelessly i realize i could use the 433mhz RF transmitter/reciever but i have to have another BS2 on the computer end, and i really dont want to pay for another basic stamp. So is it possible to have a propeller on the computer end and use some other type of RF module to communicate? Any help would be appreciated.

Comments

  • StefanL38StefanL38 Posts: 2,292
    edited 2009-10-14 20:40
    the 433 MHz transmitter/receiver do not belong to a propeller, basic stamp or any other kind of hardware

    as you can read in the description

    Note: These devices can be connected to a PC serial port using a MAX232 line driver.
    The circuit isn't supported by Parallax, but it's possible to make this connection with a few dollars of parts.
    There is an outline of connections on the forums.

    On the PC-side a MAX232-linedriver for $2 or even less, some capacitors is enough.
    All you have to do is shift voltage levels from

    PC +-12V to propeller 0V/3.3V using a Max232-3 (operates with 0V/3.3V on the TTL-side)
    or
    PC +-12V to basic stamp 0V/5V using a MAX 232 (operates with 0V/5V on the TTL-side)

    If you have always a direct sight from sender to receiver you could even use an IR-transmitter/receiver

    My son has a toycar wich is controlled by a IR-remote-control. It works properly on distances up to 20 feet !
    With modulated IR-light and five bright IR-diodes the receiver will get enough signal even reflected from a wall !

    best regards

    Stefan
  • EastBurkeEastBurke Posts: 17
    edited 2009-10-14 21:13
    oh ok so i could use the 433mhz module on the propeller but i would have to get a MAX232-3 line driver
  • sylvie369sylvie369 Posts: 1,622
    edited 2009-10-14 21:21
    EastBurke said...
    oh ok so i could use the 433mhz module on the propeller but i would have to get a MAX232-3 line driver
    No, the MAX232 is for connecting directly to a PC without any Stamp or Propeller or whatever at all. Stefan was just pointing out that you don't even need a processor on the receiving end if you just connect it through a MAX232 circuit into your PC (or the transmitting end, for that matter, if that's how you want to do it).

    You can connect the 433MHz modules directly to your Stamp on one end and your Propeller on the other. I've used the older version (separate 433 MHz transmitter/receiver) sending from a Propeller and receiving to a Stamp. It works just fine. Whatever receives the signals won't care which chip controlled the radio that sent 'em.
  • EastBurkeEastBurke Posts: 17
    edited 2009-10-14 21:47
    "You can connect the 433MHz modules directly to your Stamp on one end and your Propeller on the other. I've used the older version (separate 433 MHz transmitter/receiver) sending from a Propeller and receiving to a Stamp. It works just fine. Whatever receives the signals won't care which chip controlled the radio that sent 'em."


    ok that answered my question perfectly, I will send with the propeller and receive withe the stamp. I would like to learn Spin anyways.
  • hover1hover1 Posts: 1,929
    edited 2009-10-14 21:57
    Just curious. Is it the $40.00 difference between the BS2 and Prop? If getting up to speed is of the essence, such as a class project, I would stick to the Stamp right now on both sides. But if it is for personal project, then go for the Propeller.·Just expect a learning curve. But it's worth it!

    Jim
    EastBurke said...

    ok that answered my question perfectly, I will send with the propeller and receive withe the stamp. I would like to learn Spin anyways.
  • StefanL38StefanL38 Posts: 2,292
    edited 2009-10-14 22:02
    to say all possabilities explicit:

    you can communicate wirelessly

    PC----MAX232----433MHz .............. 433MHz---MAX232
    PC

    Propeller----433MHz .............. 433MHz---Propeller

    Basic stamp----433MHz .............. 433MHz---Propeller

    Basic stamp----433MHz .............. 433MHz---Basic stamp

    Propeller----433MHz .............. 433MHz---Basic Stamp

    PC----MAX232----433MHz .............. 433MHz---Propeller

    PC----MAX232----433MHz .............. 433MHz---Basic stamp

    Propeller----433MHz .............. 433MHz---MAX232---PC

    Basic stamp----433MHz .............. 433MHz---MAX232---PC

    got it ?
  • hover1hover1 Posts: 1,929
    edited 2009-10-14 22:14
    I was just doing up the same thing in Visio. You beat me to it!
    StefanL38 said...
    to say all possabilities explicit:

    you can communicate wirelessly

    PC----MAX232----433MHz .............. 433MHz---MAX232
    PC

    Propeller----433MHz .............. 433MHz---Propeller

    Basic stamp----433MHz .............. 433MHz---Propeller

    Basic stamp----433MHz .............. 433MHz---Basic stamp

    Propeller----433MHz .............. 433MHz---Basic Stamp

    PC----MAX232----433MHz .............. 433MHz---Propeller

    PC----MAX232----433MHz .............. 433MHz---Basic stamp

    Propeller----433MHz .............. 433MHz---MAX232---PC

    Basic stamp----433MHz .............. 433MHz---MAX232---PC

    got it ?
  • EastBurkeEastBurke Posts: 17
    edited 2009-10-14 22:31
    Yea i got it now. Its a personal project so i have all the time in the world to do it.
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