3D Touch z-probe and RADDS

Hi,

I'm trying to connect a Geetech 3D Touch z-probe sensor (http://www.geeetech.com/wiki/index.php/3DTouch_Auto_Leveling_Sensor) to my RADDS 1.5 board (using DC42 fork of reprap firmware).
I don't really understand which type of z-probe I have to select with M558 (http://reprap.org/wiki/G-code#M558:_Set_Z_probe_type). The text explaining the probe types seems confusing to me. The sensor generates a HIGH signal when triggered, so which probe type would I need to choose then?
And I can't really seem to find out what PIN I have to connect to on the RADDS for this probe. Does anyone know which pin I have to connect the probe-signal to?

Thanks!

Bram

I'm using pin SERVO_PWM_3 for my probe. (See bottom left corner)
The probe definition is for a proximity sensor, pulling the signal low when triggered, so you may be lucky by just setting I=0 instead.

M574 X1 Y1 Z0 S0				; set endstop configuration // X and Y endstops only, Z-probe is endstop too

; Z probe
M558 P4 X0 Y0 Z1 I1 R0.1 H1 F120 T4800		; dive height 1mm, probing speed 120mm/min, travel speed 4800mm/min // I1=inverted

Thanks! If I may ask, how did you know that the firmware looks at this pin when the probe type is P4? Or did you go into the firmware to do this?

I followed this thread right from the beginning. Now it's a bit long to read it all, but worth a visit for RADDS starters.

Thanks, I will try to read it all, but can you just tell me if the PWM3 is a standard PIN for the z-probe (type 4), or if you set that yourself somehow? Because if it's the standard pin I could just do that and I'll try to read the whole thread later