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Bluetooth or Other Remote Control Link

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A friend has asked me for help with an idea he has which requires a 
simple RF link to control a 12 volt circuit.  One end of the link would 
need an MCU to collect the inputs and make a decision about the state of 
the 12 volt circuit.  The RF link is used to control the 12 volt 
circuit.  The MCU end would be battery powered and so needs to be low 
energy.  It is only on with a very low duty cycle, less than a dozen 
times a day for a short while each time.  There may be a need for a 
bidirectional link to verify the serial number of the remote unit, I'm 
not sure.  The range is single digit feet, but there may be metal in the 
way, similar to a unit under a car hood for example.

I was originally thinking of using Bluetooth, BLE specifically.  But I 
have had some awkwardness with the connection in various uses.  One 
advantage is that qualified modules are available which get around the 
FCC certification I believe.  I found the NRF51822 Eval Kit which seems 
to be a SOC with both Bluetooth and an ARM CM0, not bad but no certs I 
would assume.

If the remote unit does not need to be identified, I would think there 
are much simpler solutions.  I expect the type of xmit and receive 
modules used in weather stations might be adequate.

Any recommendations for units to consider for a prototype?

-- 

Rick

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Thread

Bluetooth or Other Remote Control Link rickman <gnuarm@gmail.com> - 2015-02-11 11:40 -0500
  Re: Bluetooth or Other Remote Control Link "antedeluvian" <63015@embeddedrelated> - 2015-02-11 12:37 -0600
  Re: Bluetooth or Other Remote Control Link Paul Rubin <no.email@nospam.invalid> - 2015-02-11 11:21 -0800
  Re: Bluetooth or Other Remote Control Link langwadt@fonz.dk - 2015-02-11 12:38 -0800
  Re: Bluetooth or Other Remote Control Link Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2015-02-11 22:51 +0200
    Re: Bluetooth or Other Remote Control Link rickman <gnuarm@gmail.com> - 2015-02-11 22:12 -0500
  Re: Bluetooth or Other Remote Control Link Tim Wescott <seemywebsite@myfooter.really> - 2015-02-11 18:09 -0600
    Re: Bluetooth or Other Remote Control Link rickman <gnuarm@gmail.com> - 2015-02-11 22:07 -0500
      Re: Bluetooth or Other Remote Control Link Tim Wescott <tim@seemywebsite.com> - 2015-02-12 09:55 -0600
        Re: Bluetooth or Other Remote Control Link rickman <gnuarm@gmail.com> - 2015-02-12 15:04 -0500
          Re: Bluetooth or Other Remote Control Link Tim Wescott <seemywebsite@myfooter.really> - 2015-02-12 17:37 -0600
            Re: Bluetooth or Other Remote Control Link edward.ming.lee@gmail.com - 2015-02-12 16:34 -0800
            Re: Bluetooth or Other Remote Control Link rickman <gnuarm@gmail.com> - 2015-02-12 22:32 -0500
              Re: Bluetooth or Other Remote Control Link Tim Wescott <tim@seemywebsite.com> - 2015-02-13 11:18 -0600
              Re: Bluetooth or Other Remote Control Link John Luciani <jluciani@gmail.com> - 2015-02-14 03:25 -0800
                Re: Bluetooth or Other Remote Control Link "antedeluvian" <63015@embeddedrelated> - 2015-02-14 10:51 -0600
  Re: Bluetooth or Other Remote Control Link Frnak McKenney <frnak@far.from.the.madding.crowd.com> - 2015-02-14 11:50 -0600
    Re: Bluetooth or Other Remote Control Link rickman <gnuarm@gmail.com> - 2015-02-15 21:49 -0500
  Re: Bluetooth or Other Remote Control Link o pere o <me@somewhere.net> - 2015-02-16 09:29 +0100
    Re: Bluetooth or Other Remote Control Link Jason wu <jasonwxwcn@gmail.com> - 2015-02-27 22:28 -0800
      Re: Bluetooth or Other Remote Control Link hamilton <hamilton@nothere.com> - 2015-02-28 13:17 -0700
        Re: Bluetooth or Other Remote Control Link Jason wu <jasonwxwcn@gmail.com> - 2015-03-04 05:35 -0800

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