Search found 8 matches

by SteveKinder
Fri Apr 26, 2013 1:32 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

Just to let you know things are now working with the 64 bit library you let me have. I started my test programs from scratch again and things worked fine. I also suspect I may have had a process lying around that had the device connected but I'm not sure. I got access working from Visual Studio and ...
by SteveKinder
Tue Apr 23, 2013 4:28 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

Thanks for that. I have tried this library, initially with Qt and an MSVC 2010 compiler then directly with Visual Studio 2010. In both cases the IowKitOpenDevice call seems to fail: IOWKIT_HANDLE ioHandle; ioHandle = IowKitOpenDevice(); Doubt this helps but with Visual Studio an error popup appears ...
by SteveKinder
Mon Apr 22, 2013 5:54 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

I do want to use this in a bigger application that requires 64 bit. I could create a stand alone 32 application and use some sort of inter-process communication. The latter is my fall back position. I had seen that 64 bit library. However I tried the equivalent 32 bit version and using that the IowK...
by SteveKinder
Fri Apr 19, 2013 1:19 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

My initial attempts fail with errors as follows: 1> Creating library Release\iowkit.lib and object Release\iowkit.exp 1>openclos.obj : error LNK2001: unresolved external symbol HidD_SetNumInputBuffers 1>openclos.obj : error LNK2001: unresolved external symbol HidD_GetAttributes 1>openclos.obj : erro...
by SteveKinder
Fri Apr 19, 2013 11:07 am
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

Any particular advice on building the library as 64 bit?
by SteveKinder
Thu Apr 18, 2013 1:57 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

Thanks again for your latest reply. I have now determined what I think are the correct calculations to perform with the raw numbers that come out of the sensor. Based on the Sensirion datasheets I think the sample code is for an SHT71 sensor rather than and SHT21. Modifying the calculations I can no...
by SteveKinder
Tue Apr 16, 2013 5:52 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Re: Sensirion EK-H5 interfacing

Many thanks for the help, I now have the sensor producing numbers. The temperature and humidity seem higher than produced by the standard Sensirion GUI. Would the temperature and humidity calculations in the sample code be applicable to a SHT21 on the EK-H5 kit? Any other thoughts on why the values ...
by SteveKinder
Mon Apr 15, 2013 2:46 pm
Forum: IO-Warrior English
Topic: Sensirion EK-H5 interfacing
Replies: 13
Views: 23981

Sensirion EK-H5 interfacing

I have a Sensirion EK-H5 evaluation kit for the Sensirion SHT21 humidity-temperature sensor. This is connected by what I believe is a customized IO-Warrior USB interface. Sensirion have given me customized dll that should give me what I need to interface from C. They also distribute an executable GU...