Diseqc control anyone ?

Hi

I was wondering if someone has already made a project to control a 2 or 4 way diseqc
antenna switch

As i dont want to reinvent "the wheel" maybe someone can share his project

Thanks

HI ... RF solution ..
It seems that nobody has done something on this subject (DISECQ commands from a PIC)
Do you find "a solution" ?
thanks
Francois F1CHF

I doubt you would get a reply unless the OP still receives notifications as his last post was back in 2014.

I have done it once using soundcard, not PBP :)

Thnks for the replies
Yes it seems that nobody has done something via a PIC solution
I found some example but with Arduino.
Objective is to have a Disecq transmitter not for sat station or LNB
but to program some switchs or drive (and control) an Antenna rotator !
the hardware link could be an ordinary coaxial (power and 22 Khz Disecq)
as usual, it is a project ... number xx ... hi !!!
Francois F1CHF

There are some speciality devices, which can do that.

some details please ....
thanks

Hi,
Am I correct in that "all it is" a 22kHz carrier modulated 0.5ms ON, 1.0ms OFF for a logic one and 1.0ms ON, 0.5ms ON for logic zero? How critical is the 22kHz and how critical is the on/off times?

Doesn't sound too hard to do with a PIC, much like a IR remote. The CCP moudle can generate a 22kHz tone which you can modulate with software by simply truning the signal on and off. You need external filter and attenutation+buffer to get the 0.65V peak-to-peak sinewave carrier.

With that said, I've got no experience with Diseqc, this is the firts time I've looked at it.

/Henrik.

I think this PDF has enough information to create a PBP encoder/decoder. Like Henrik said, it looks a lot like IR remote control format. Very low bit rate.

http://www.eutelsat.com/files/contri...s/bus_spec.pdf

yes you are right, seems similar to IR protocol
Henri what do you mean bye "The CCP moudle can generate a 22kHz"
there are two options : External 22 Khz generator or if the pic is free, have a process to do that ..
They said "nominal 22 kHz (±20 %)" so a simple NE555 could be OK

I must make a prototype, as I have some Disecq LNB switch to test, I will be able to verify
problem is to fond some more time !
This was the first objective of my first message "already done by somebody" hi ...
Thanks
Francois

The CCP module can be setup to generate a 22kHz squarewave. Use an external filter to turn it into a sine and attenutate it 650mV, then use a rail-to-rail OP-Amp to buffer it and (I'm guessing) AC-couple it onto the coax. Then it's just a matter of turning the CCP module on and off with the correct timings to get the signal out.

I don't know, you may be able to just attenuate and AC-couple the square wave directly onto the cable.

Do you have a PIC already that you wanted to use?

Devices like this can be used for this task:

http://www.ebay.com/itm/SatLink-WS-6...0AAOSwc1FXbKjD

Also, as I said, I've generated diseqc commands in sound editor. Then recorded to phone, and built simple circuit to allow it to be transferred to switch.