Phidgets.com

Hi

I wonder whether anyone can help me fix the following behavior I see with the 8/8/8 interface kit under both windows and LINUX with the 2.1 library.

When making measurements I get the correct value followed immediately by a bogus lower value. For example a temperature sensor would return 19 immediately followed by 15. The first value is correct, the second is bogus. I tried different temp sensors, different ports and did even raw ADC conversions. It's always the same, there is a correct measurement followed by a lower bogus value.

I don't know much about electronics and was thinking that maybe the supply volatge breaks in under a measurement but even with a USB hub I see this behavior.

Since the 2 values are so far apart I cannot put a simple threshold in place.


Maybe someone knows what is going on.
Thank you.
Ralf

P.S. Does the phidget run a firmware btw?

When/where did you buy it?

Can you tell us the firmware device version? It's exposed through the API.

Chester

The firmware version is 824. The serial number is 37784. Is there an upgrade available?

I bought it from Trossen Robotics some time ago (1 year). I had done one experiment before where I didn't mind the oscillation and then did some Arduino stuff. Now however do I need accuracy in the sensor output for some precision measurements.

Still hoping I can upgrade the firmware to fix it...

This is our bad. We ran the SPI clock a bit fast on that firmware version.
Email support@phidgets.com, and we'll send you a new one.

Chester