Right now, the node converts the 16-bit reading from the z-axis accelerometer and the sign-bit from the x-axis accelerometer in order to determine the angle from 0-255. It could be extremely useful to have the node enter a "calibration mode" and have someone swing in the swing to set the minimum and maximum acceleration values to use for scaling.

This mode could be enabled and disabled remotely, and the values could be stored in non-volatile memory to persist reboots.

So it's been a while since I've done a lot of physics, so the physics in calculation the angle from the acceleration needs to be verified and adjusted. This might not be necessary if an auto-calibration routine is added, but it will probably good to verify either way.

I think the current calculation is wrong, so I'm marking this as a bug.

In order to help visualize the calculated angle for the swing, it would be good to have a simple GUI display of the received angle in a portal script.

Since portal can use wx, this would probably be a good path to start down.