Re: [Paparazzi-devel] recommended remote / radio control for SUMO-like ppz-system

[Martin Mueller]

Hi Andreas,

the idea of the SUMO instructions is to describe a well tested system 
that can be build by scientists that have little or no 
RC/electronics/software experience. The mentioned parts have been used 
in harsh conditions (mainly low temperatures) and worked without issues.

SUMO still uses a LPC-2148 processor based (Umarim) board as it just 
worked over the years and there were no features missing that the new 
processors/boards can give (as an additional UART for Spektrum). That 
should not mean that new boards should not be used...

A PPM signal is needed for the LPC boards. The Graupner HOTT would also 
work as Sergey mentioned. As he said, some receivers can be programmed 
to give a PPM sum signal, some (sort of hidden) instructions for the 
GR-16/MC-32 are in

https://github.com/paparazzi/paparazzi/blob/campaign2011/conf/radios/mc32_7ch.xml

Martin

On 11/19/2013 10:51 PM, Andreas Philipp wrote:
> Dear all,
>
> I'm completely new to PPZ and only have some (not much) experience with
> conventional rc-flight using a spektrum dx6i and a graupner mx16 radio.
> Now I have to buy a new radio control (among the rest) in order to build
> a SUMO-like drone for meteorological measurements at university (and it
> should be done quickly as always at the end of the year).
>
> The plan is to build a SUMO-like prototype which should require as few
> work and troubles as possible in order to have a working system for
> learning first and then address to modifications later. The plan is to
> work through the bill of material at
> http://paparazzi.enac.fr/wiki/SUMO/prepare_electronics and order the
> parts from different dealers. However concerning the radio control I
> don't know what's the best to do.
>
> In the SUMO description
> (http://paparazzi.enac.fr/wiki/SUMO/rc_transmitter) the Futaba T8FG and
> the Futaba T7C are used, but in fact I would tend to the DX8 radio
> control which allows to use the receiver satellites (some thing I do not
> understand fully yet, but which seems clever to me).
>
> However I figured out in the wiki that "Proper Spektrum support is only
> provided for the STM32 based autopilots. ", however I am not sure
> whether we need to have a Umarim lite for building a SUMO or if the
> Umarim could be replaced easily by an APOGEE (with all the sensor
> connections and so on). It is important for me first to have a more or
> less trouble free system, in order to learn how everything should work.
>
> The RC should be easy to use (i.e. 2,4 GHz) have some additional
> telemetry (especially a vario beside the PPZ system if possible) and
> allow a range of up to 1-2km (as usual radios do as I understand). Eight
> channels are preferred (even it is now used only with a flying wing
> which just needs 3 channels for throttle and 2 rudders). A three way
> switch is also important for the autopilot mode it seems. Costs for the
> RC including receiver should not exceed 400 euros (550 dollars).
> As far as I understand any other RC than Spektrum needs ppm-support,
> which the Futaba seems to have. A ppm-encoder should be avoided.
>
> Can anyone please give advise, which RC can be recommended for this set
> up (or in general for ppz-support)?
>
> Thanks a lot!
>
> Andreas
>
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