From: Marc M. <ma...@me...> - 2010-03-25 18:28:41
|
I bought the oregon scientific WMR90 kit, which displays pressure, but it seems to gather baro data on the display device, not on a sensor that would send me the data I can later capture and log on my server. I didn't find an oregon scientific baro sender. Did I miss one? If not, is my best option this 1-wire baro sensor? http://www.hobby-boards.com/catalog/product_info.php?cPath=22&products_id=36 Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems & security .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ |
From: Marc M. <ma...@me...> - 2010-03-25 20:38:48
|
On Thu, Mar 25, 2010 at 11:28:33AM -0700, Marc MERLIN wrote: > I bought the oregon scientific WMR90 kit, which displays pressure, but it > seems to gather baro data on the display device, not on a sensor that would > send me the data I can later capture and log on my server. > > I didn't find an oregon scientific baro sender. Did I miss one? > > If not, is my best option this 1-wire baro sensor? > http://www.hobby-boards.com/catalog/product_info.php?cPath=22&products_id=36 Actually I just found an oregon scientific baro + thermo + hygro for just $34. Cheaper than the 1-wire baro only device... http://www.amazon.com/Oregon-Scientific-BTHR968-Wireless-Baro-Thermo-Hygrometer/dp/B00006J03H It's not listed in the rfxcom compatibility page, but I'm going to guess it works anyway. Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems & security .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ |
From: Charles S. <cws...@tr...> - 2010-03-26 03:13:41
|
On Thu, 25 Mar 2010 17:15:59 -0700 Marc MERLIN <ma...@me...> wrote: > On Thu, Mar 25, 2010 at 04:55:10PM -0700, Marc MERLIN wrote: > > On Thu, Mar 25, 2010 at 06:30:24PM -0400, Charles Sullivan wrote: > > > The Oregon BTHR968 works fine with the RFXCOM 433.92MHz receiver in > > > variable length packet mode. It's out of production but apparently > > > still available on dealer shelves. > > > > Looks like it, yes. > > > > > A _possible_ alternative is an RFXSensor 433.92MHz Temperature/BP sensor. > > > I no longer see it on the RFXCOM website but you might inquire if the BP > > > daughterboard is still available. (This would probably be the most > > > expensive of the 3 alternatives.) > > > > Ok, let's not worry about it then. > > A Baro-Thermo-Hygrometer for $34 is pretty hard to beat ;) > > Mmmh, but the reviews on the oregon scientific stuff can be quite horrible: > http://www.amazon.com/Oregon-Scientific-WMR968-Complete-Weather/product-reviews/B00005B0BL/ref=cm_cr_pr_link_1?ie=UTF8&showViewpoints=0&filterBy=addOneStar > > I wonder if the BTHR968 was discontinued because it was crap? > > I also noticed it's not meant for outside use, which in the case of baro > isn't too ideal if you have forced air and a non leaky house (I'm going to > guess pressure in the house may not be the same than outside, even with the > supposedly closed system with air returns). > > Maybe putting it just outside my window with the LCD facing inside and in > such a way that rain can't fall on it should work, but considering how > "reliable" the oregon scientifc stuff seems to be, I'm wondering if I'm not > pushing my luck. > > What are others doing? > > Marc Marc, I have 6 Oregon sensors of various models around the house and garage which have been operating since early-2008, a BTHR968 since Dec 2008. Data is received with a RFXCOM receiver. So far no problems. The main shortcoming is that the humidity sensors (per their specs) have no accuracy below about 25% RH, which is easily achieved in a heated house in Winter. YMMV, but I have forced air and with the fan operating I don't see any change in BP reading (least count is 1 millibar) if I open the window in the room where I have the BTHR968. Regards, Charles Sullivan |
From: Marc M. <ma...@me...> - 2010-03-26 03:32:18
|
On Thu, Mar 25, 2010 at 10:07:15PM -0400, Charles Sullivan wrote: > Marc, > All 3 data values from the BTHR968 are included in one 88-bit transmission, > not necessarily in contiguous bits. You have to do some ANDing and bit > shifting to separate and decode them. There's also a low-battery bit and > a 2-bit forecast. > > I suspect the 1-wire unit would be simpler. On Thu, Mar 25, 2010 at 08:25:57PM -0600, sa...@ir... wrote: > Or let an xPL gateway process them and read the UDP xPL packets instead. Since it sounds like I'll have to be runnig xPL anyway, that would be fine with me. On Thu, Mar 25, 2010 at 11:13:35PM -0400, Charles Sullivan wrote: > Marc, > I have 6 Oregon sensors of various models around the house and garage which > have been operating since early-2008, a BTHR968 since Dec 2008. Data is > received with a RFXCOM receiver. So far no problems. The main shortcoming Thanks for that. Some of the reviews on amazon on the WMR968 and its elements, have been very worrisome to say the least. It sounds like their solar stuff is worthless (I'll get lithium batteries intead), and that their wind and rain sensors aren't good. But if the BTHR968 works, I'll buy a couple before they go out of stock entirely, especially fro as cheap as they seem to be. > is that the humidity sensors (per their specs) have no accuracy below about > 25% RH, which is easily achieved in a heated house in Winter. Right. I have a 1-wire humidity sensor on the way too so I'll rely on that for the house when it's dry. > YMMV, but I have forced air and with the fan operating I don't see any change > in BP reading (least count is 1 millibar) if I open the window in the room > where I have the BTHR968. Good to know. Thanks for the replies. Sounds like a couple of BTHR968s and xPL will do the trick. Souds like the WMR90 I just bought won't be able to decode any data from them but whatever, I mostly bought that kit to get the combined wind/temp/humidity sensor and rain sensor that came with it. Looks like if I wanted something that reads the BTHR968s, I'd have to buy the WMR968 and it is said to suck hard :) Just curious, do you have a display other than mh for your sensors, or you just go with mh? Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems & security .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ |
From: Charles S. <cws...@tr...> - 2010-03-25 22:30:31
|
On Thu, 25 Mar 2010 13:38:39 -0700 Marc MERLIN <ma...@me...> wrote: > On Thu, Mar 25, 2010 at 11:28:33AM -0700, Marc MERLIN wrote: > > I bought the oregon scientific WMR90 kit, which displays pressure, but it > > seems to gather baro data on the display device, not on a sensor that would > > send me the data I can later capture and log on my server. > > > > I didn't find an oregon scientific baro sender. Did I miss one? > > > > If not, is my best option this 1-wire baro sensor? > > http://www.hobby-boards.com/catalog/product_info.php?cPath=22&products_id=36 > > Actually I just found an oregon scientific > baro + thermo + hygro for just $34. > Cheaper than the 1-wire baro only device... > > http://www.amazon.com/Oregon-Scientific-BTHR968-Wireless-Baro-Thermo-Hygrometer/dp/B00006J03H > > It's not listed in the rfxcom compatibility page, but I'm going to guess it > works anyway. > > Marc Marc, The Oregon BTHR968 works fine with the RFXCOM 433.92MHz receiver in variable length packet mode. It's out of production but apparently still available on dealer shelves. A _possible_ alternative is an RFXSensor 433.92MHz Temperature/BP sensor. I no longer see it on the RFXCOM website but you might inquire if the BP daughterboard is still available. (This would probably be the most expensive of the 3 alternatives.) A major consideration however is whether your potential choice of sensor is supported in MH. Regards, Charles Sullivan |
From: Marc M. <ma...@me...> - 2010-03-25 23:55:19
|
On Thu, Mar 25, 2010 at 06:30:24PM -0400, Charles Sullivan wrote: > The Oregon BTHR968 works fine with the RFXCOM 433.92MHz receiver in > variable length packet mode. It's out of production but apparently > still available on dealer shelves. Looks like it, yes. > A _possible_ alternative is an RFXSensor 433.92MHz Temperature/BP sensor. > I no longer see it on the RFXCOM website but you might inquire if the BP > daughterboard is still available. (This would probably be the most > expensive of the 3 alternatives.) Ok, let's not worry about it then. A Baro-Thermo-Hygrometer for $34 is pretty hard to beat ;) > A major consideration however is whether your potential choice of > sensor is supported in MH. In which way? If I can get data into it, I can graph it with cacti/rrdtool and I can somehow get that data into MH one way or another. Were you referring to this sensor showing up as 3 nice easily packaged ready to use variables? It might not, but that's not really a big deal for me if that's what you meant :) Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems & security .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ |
From: Charles S. <cws...@tr...> - 2010-03-26 13:44:44
|
On Thu, 25 Mar 2010 20:32:07 -0700 Marc MERLIN <ma...@me...> wrote: > On Thu, Mar 25, 2010 at 10:07:15PM -0400, Charles Sullivan wrote: > > Marc, > > All 3 data values from the BTHR968 are included in one 88-bit transmission, > > not necessarily in contiguous bits. You have to do some ANDing and bit > > shifting to separate and decode them. There's also a low-battery bit and > > a 2-bit forecast. > > > > I suspect the 1-wire unit would be simpler. > > On Thu, Mar 25, 2010 at 08:25:57PM -0600, sa...@ir... wrote: > > Or let an xPL gateway process them and read the UDP xPL packets instead. > > Since it sounds like I'll have to be runnig xPL anyway, that would be fine > with me. > > On Thu, Mar 25, 2010 at 11:13:35PM -0400, Charles Sullivan wrote: > > Marc, > > I have 6 Oregon sensors of various models around the house and garage which > > have been operating since early-2008, a BTHR968 since Dec 2008. Data is > > received with a RFXCOM receiver. So far no problems. The main shortcoming > > Thanks for that. Some of the reviews on amazon on the WMR968 and its > elements, have been very worrisome to say the least. > It sounds like their solar stuff is worthless (I'll get lithium batteries > intead), and that their wind and rain sensors aren't good. > But if the BTHR968 works, I'll buy a couple before they go out of stock > entirely, especially fro as cheap as they seem to be. > > > is that the humidity sensors (per their specs) have no accuracy below about > > 25% RH, which is easily achieved in a heated house in Winter. > > Right. I have a 1-wire humidity sensor on the way too so I'll rely on that > for the house when it's dry. > > > YMMV, but I have forced air and with the fan operating I don't see any change > > in BP reading (least count is 1 millibar) if I open the window in the room > > where I have the BTHR968. > > Good to know. > > Thanks for the replies. Sounds like a couple of BTHR968s and xPL will do the > trick. Souds like the WMR90 I just bought won't be able to decode any data from > them but whatever, I mostly bought that kit to get the combined > wind/temp/humidity sensor and rain sensor that came with it. > Looks like if I wanted something that reads the BTHR968s, I'd have to buy > the WMR968 and it is said to suck hard :) > > Just curious, do you have a display other than mh for your sensors, or you > just go with mh? > > Thanks, > Marc Marc, To be clear, I don't use MH (and know little about it). I use Heyu to read and process sensor data. (If you're running Linux, I suspect Heyu could be used in the background to decode and feed Oregon data into MH if xPL doesn't have support for your particular Oregon sensor models.) I have the Oregon WMR80A Weather Station but am not actually using the wind and rain sensors - only got it to add support to Heyu for these sensors. From the pictures I see on the internet, your WMR90 base station looks like the same thing as the WMR80 base station. I have the WMR80 sitting on my desk next to the BTHR968. One thing I noticed is if the base station displays low battery, its Barometric Pressure reading goes to hell. Regards, Charles Sullivan |
From: Marc M. <ma...@me...> - 2010-03-26 00:16:18
|
On Thu, Mar 25, 2010 at 04:55:10PM -0700, Marc MERLIN wrote: > On Thu, Mar 25, 2010 at 06:30:24PM -0400, Charles Sullivan wrote: > > The Oregon BTHR968 works fine with the RFXCOM 433.92MHz receiver in > > variable length packet mode. It's out of production but apparently > > still available on dealer shelves. > > Looks like it, yes. > > > A _possible_ alternative is an RFXSensor 433.92MHz Temperature/BP sensor. > > I no longer see it on the RFXCOM website but you might inquire if the BP > > daughterboard is still available. (This would probably be the most > > expensive of the 3 alternatives.) > > Ok, let's not worry about it then. > A Baro-Thermo-Hygrometer for $34 is pretty hard to beat ;) Mmmh, but the reviews on the oregon scientific stuff can be quite horrible: http://www.amazon.com/Oregon-Scientific-WMR968-Complete-Weather/product-reviews/B00005B0BL/ref=cm_cr_pr_link_1?ie=UTF8&showViewpoints=0&filterBy=addOneStar I wonder if the BTHR968 was discontinued because it was crap? I also noticed it's not meant for outside use, which in the case of baro isn't too ideal if you have forced air and a non leaky house (I'm going to guess pressure in the house may not be the same than outside, even with the supposedly closed system with air returns). Maybe putting it just outside my window with the LCD facing inside and in such a way that rain can't fall on it should work, but considering how "reliable" the oregon scientifc stuff seems to be, I'm wondering if I'm not pushing my luck. What are others doing? Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems & security .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ |
From: Charles S. <cws...@tr...> - 2010-03-26 02:07:22
|
On Thu, 25 Mar 2010 16:55:10 -0700 Marc MERLIN <ma...@me...> wrote: > On Thu, Mar 25, 2010 at 06:30:24PM -0400, Charles Sullivan wrote: > > The Oregon BTHR968 works fine with the RFXCOM 433.92MHz receiver in > > variable length packet mode. It's out of production but apparently > > still available on dealer shelves. > > Looks like it, yes. > > > A _possible_ alternative is an RFXSensor 433.92MHz Temperature/BP sensor. > > I no longer see it on the RFXCOM website but you might inquire if the BP > > daughterboard is still available. (This would probably be the most > > expensive of the 3 alternatives.) > > Ok, let's not worry about it then. > A Baro-Thermo-Hygrometer for $34 is pretty hard to beat ;) > > > A major consideration however is whether your potential choice of > > sensor is supported in MH. > > In which way? If I can get data into it, I can graph it with cacti/rrdtool > and I can somehow get that data into MH one way or another. > > Were you referring to this sensor showing up as 3 nice easily packaged ready > to use variables? It might not, but that's not really a big deal for me if > that's what you meant :) > > Marc Marc, All 3 data values from the BTHR968 are included in one 88-bit transmission, not necessarily in contiguous bits. You have to do some ANDing and bit shifting to separate and decode them. There's also a low-battery bit and a 2-bit forecast. I suspect the 1-wire unit would be simpler. Regards, Charles Sullivan |
From: <sa...@ir...> - 2010-03-26 02:26:05
|
Or let an xPL gateway process them and read the UDP xPL packets instead. Thanks, Greg > Marc, > All 3 data values from the BTHR968 are included in one 88-bit > transmission, > not necessarily in contiguous bits. You have to do some ANDing and bit > shifting to separate and decode them. There's also a low-battery bit and > a 2-bit forecast. > > I suspect the 1-wire unit would be simpler. > > Regards, > Charles Sullivan |