I asked the same question a while back. The answer from Eric Vickery, the Hobbyboards guy was 'You should use the HIH4000 for the humidity readings. The sensor used on our humidity boards is the HIH-4021 now.' I believe that the others are to allow for different sensor chips to be used, maybe other suppliers use other chips.
On my sensor at the moment I see /humidity 45.7448 /HIH3600/humidity 44.9991 /HIH4000/humidity 64.9517 /HTM1735/humidity 19.1244 So there is a significant difference between them. I don't have any way to confirm the actual reading, but I would think that the 64.9517 value is the most believable of them. Cheers Mick On 14/02/13 21:44, Terry A. Haimann wrote: > Yes I figured it out. A web page I saw misled me into believing that was > the correct device. Me bad. > What's the difference between HIH4000& HIH 3600, they both have a > humidity field. Their numbers are a little different though. > > On Thu, 2013-02-14 at 19:26 +0000, Mick Sulley wrote: >> Wrong device. The Humidity sensor is 26.F59F21010000. The software >> setup allows for several actual sensor modules, the one in my >> Hobbyboards unit is an HIH4000. The directory layout is a bit different >> to temperature sensors, under the 26.F59F21010000 directory there is an >> HIH4000 directory and in there is a humidity file, that's teh one you need. >> >> Cheers >> Mick >> >> On 14/02/13 19:39, Terry A. Haimann wrote: >>> I am having trouble getting owfs to read the humidity sensor. I have >>> probably done something stupid. I am hoping it is just something I have >>> to change in the config, be kind to me since I am new to owfs. Just a >>> fyi, I am running a Hobby Board temp/humidity sensor. >>> >>> I have owfs running on a Raspberry Pi. >>> >>> pi@watermelon ~ $ owdir >>> /10.6F415B020800 >>> /26.F59F21010000 >>> /81.91D630000000 >>> /bus.1 >>> /uncached >>> /settings >>> /system >>> /statistics >>> /structure >>> /simultaneous >>> /alarm >>> >>> I look at the files under /81.91D630000000 and I don't see anything that >>> looks like the humidity: >>> >>> pi@watermelon ~ $ ls -l /mnt/1wire/81.91D630000000/ >>> total 0 >>> -r--r--r-- 1 root root 16 Feb 14 12:12 address >>> -rw-rw-rw- 1 root root 256 Feb 14 12:12 alias >>> -r--r--r-- 1 root root 2 Feb 14 12:12 crc8 >>> -r--r--r-- 1 root root 2 Feb 14 12:12 family >>> -r--r--r-- 1 root root 12 Feb 14 12:12 id >>> -r--r--r-- 1 root root 16 Feb 14 12:12 locator >>> -r--r--r-- 1 root root 16 Feb 14 12:12 r_address >>> -r--r--r-- 1 root root 12 Feb 14 12:12 r_id >>> -r--r--r-- 1 root root 16 Feb 14 12:12 r_locator >>> -r--r--r-- 1 root root 32 Feb 14 12:12 type >>> >>> I have cat'd all of these files and nothing looks like humidity. I have >>> also looked at it via the webserver and also don't see the humidity >>> there. >>> >>> >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> Free Next-Gen Firewall Hardware Offer >>> Buy your Sophos next-gen firewall before the end March 2013 >>> and get the hardware for free! Learn more. >>> http://p.sf.net/sfu/sophos-d2d-feb >>> _______________________________________________ >>> Owfs-developers mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers > ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
