On Sat, 26 May 2018 20:07:50 +0100, Chris Green wrote:

David wrote:
On Sat, 26 May 2018 15:12:35 +0100, Chris Green wrote:

David wrote:
On Fri, 25 May 2018 21:11:55 +0100, Chris Green wrote:

David wrote:
Cigar socket powered screen which fits over the central rear view
mirror in the car.

Both self contained units.

... and does anything say how they're supposed to talk to each
other?


I think some posters have been a little enthusiastic in their
snippery.

Yes, probably.

Wireless, probably (almost certainly) 2.4 GHz (see Bill Wright's
early reply).

Er, yes, it could hardly be anything else could it! There still has
to be some sort of protocol that both ends undertstand for 'wireless'
to actually do anything.

It could be WiFi (11b/g/n etc.), it could be Bluetooth, or it could
be something else but there must be some sort of set of rules it
works by.

I'd expect the 'user manual' (or sheet of paper) to say what sort of
protocol is being used.

Ah, bless. :-)

The sweet innocence of youth.........

Unfortunately, no.

Still haven't snooped, but assuming some kind of proprietary broadcast
protocol using security by obscurity.

Security? What for?

Though I agree the 'user manual' may not be all that forthcoming,
that's why it's in quotes.

'Youth', the nicest thing anyone has said for years! :-)

The security is to pair the transmitter and receiver up and ignore other
broadcast sources (and also not to trample over other receivers, hopefully)

There are many tales of wireless rear view cameras which suddenly start
displaying the output of the number recognition cameras at petrol stations.

Cheers



Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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