Button # limits?

[Fishdude404]

I"m putting on the buttons for the operator interface, but the programming team says that we can only have 4 buttons per joystick port. Is that right? or can you change the number of buttons per joystick port?

[jgannon]

Four is the easy limit. You could do a setup with switches and resistors on either the wheel or aux analog port to get more switches, like the hat switch on the KOP joysticks, but it'll be a lot of work for you, and it's a little trickier for the programmers.

[Joe Ross]

You have a total of 16 digital inputs on the OI. 4 are availible on joystick 1, 8 availible on joystick 2 (the same 4 from joystick 1 and 4 new ones). 4 are availible on joystick 3 and 8 are availible on joystick 4 (the same 4 from joystick 3 and 4 new ones).

If you are building a custom button box, you could always use 2 cables. One year, we even ran the two joysticks into our button box, and had 4 output cables, so we could get more buttons.

Like Joey said, you could also use a resistor ladder to hook multiple digital switches to an analog input.

Make sure to read the OI reference guide: http://www.ifirobotics.com/docs/oi-ref-guide-2-21-05.pdf