Receive Buffer Overflow Question

[James D]

HBERROR.jpg (18.04 KiB) Viewed 6564 times

I keep getting these Buffer Overflow Errors. They keep stopping my Zwave thermostat. What are the Buffer Overflow?

[ScottBot]

The Z-Wave hardware interface has a memory buffer where it will keep incoming data until it can figure out what to do with it. Generally, the interface can identify the packet type and will know exactly what the data is. The buffer is 256 bytes long, which is enough room to handle any command. However, if for some reason the interface can't find the end of the data, the buffer will overflow and the interface will need to reset the input buffer.

The error that you are seeing before the buffer reset error is probably what is causing the issue. It's possible that the data being returned by the sensor is just not being handled correctly by the plugin. Do you know what kind of sensor and data is being returned?

[James D]

I have only a Z-Wave thermostat (Wayne Dalton WDTC-20) and a ControlThink Zwave usb adapter on my Z-Wave network. I also downgraded the firmware on the ControlThink Zwave usb adapter to work with the Housebot program. How do I find what data is being returned? Any pointers will be appreciated.

[ScottBot]

The best thing to do is to run a hardware interface trace. Sometimes it's tedious and difficult to determine much from the trace, but sometimes there's something interesting that shows up.

[James D]

I can PM you the complete Interface trace, because .CSV files are not allowed on the forum. I can send it to you.

[raptor_demon]

Hi I have noticed this with my Trane Z-wave Thermostat.

Let me know what you find.

Raptor

[ScottBot]

I can PM you the complete Interface trace, because .CSV files are not allowed on the forum. I can send it to you.

You can send it to me at support @ cebotics.com

[James D]

I sent you an email with that error trace.

Thanks.

[James D]

Hey Raptor did you have to downgrade your firmware on your z-wave usb adaptor to get HouseBot to work with your thermostat?
I am just wondering if that is the key to these buffer overflow. Just a thought.

[raptor_demon]

Hi,

No i did not, i have a Wayne Dalton USB z-wave stick.

I have enabled hardware tracing on the Z-wave adaptor so i should have some data there soon if needed.

Raptor

[raptor_demon]

Was this ever resolved?

[James D]

Wouldn't you know it. I sent my trace file to Scott, and since then I have not got any errors.

[raptor_demon]

Weird, well i am still getting these, house bot also still crashes for no reason and i cannot figure out why.

Its frustrating becuase the whole this is becoming unreliable.

[ScottBot]

Weird, well i am still getting these, house bot also still crashes for no reason and i cannot figure out why. (

If you can send me a dump file (found in the HouseBot dump directory), maybe it will shed some light on the crash. Send it to support at cebotics.com