Need help to build or buy a device

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Hello,

i want to buy or build a device which do the following:

i have a robot lawn mover which goes if you directly press a key or on scheduled times.
Problem now is, sometimes it would be better if i do this manual or by some rules in pimatic.

So i need a device which i will solder on the mover, which pressed the buttons (or surge) (433 Mhz receiver)

Any ideas how i can realize this project ?

You could buy a 433mhz receiver and an arduino pro mini or attiny85.

You can trigger a relay parallel to the button to turn it on.

Don’t know about the power, but whats the voltage of the battery of the lawnmover?

32,4 Volt, but i guess to trigger the buttons it need less voltage

Just use a relay to switch the button, always safe.

Connect this to the battery: http://r.ebay.com/GHjgu8

Add a 5v arduino pro mini: http://r.ebay.com/thVtwh

Add a 5v relay: http://r.ebay.com/ViezR6

And a 433mhz receiver ofc. http://r.ebay.com/xD7DF0

So how do i connect the devices ?

I have what Sweebee is saying.
Got a remote with a button, soldered 2 wires to it and a relay to switch, this way the button keeps working and you can activate it with the relay.
something like this
http://dump.maredana.nl/images/283hardware_hacking_garag.jpg

The arduino will receive a signal from pimatic by 433RF and turn on the relay,

@hyperx Do you wanna solder it? or just with a breadboard (quite unreliable in a moving object).

I think i will solder it, i also have to put everything in a box to protect from rain.

A PCB like this would do it: http://r.ebay.com/aaw5Ru

and some wires (can’t find cheap ones at bay?)

Edit: if you cut the pcb in 2 pieces it should fit in something like this (or just solder everything direct to the arduino pins): http://www.ebay.com/itm/271449456462?rmvSB=true