Blake-
   Try echoing the fingertip pressure topics and make sure you're getting
data:

rostopic echo pressure/r_gripper_motor

If the data is all zeros, or "-1", then the sensors aren't hooked up
properly. Can you post the output of that topic?

Moving to pr2-users, since fingertips are installed on PR2's

Kevin

On Thu, Jun 24, 2010 at 11:19 AM, Blake Carpenter <blakec@stanford.edu>wrote:

> Hello list,
>
> I'm working in the Stanford AI Lab with PR2 robot and I've installed
> the fingertip sensors on the left gripper and have been reading the
> ros page on reading the fingertip pressure:
> http://www.ros.org/wiki/fingertip_pressure.  I've been trying to get
> the pressure readings with the "view_fingertip_pressure" gui, but have
> had no luck at getting any values back from the sensors.  There are
> two demo launch files in the fingertip_pressure package and I tried
> these but did not receive any values back.  There is the
> "real_hardware_sensor.launch" file, but it has references to a
> configuration file on a willow garage machine, so I figure that is not
> the file I should be using.  Do you have any suggestions for what I
> should do to get the pressure sensor readings?
>
> Thank you,
> Blake Carpenter
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