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[wxsig] wind sensor prob

John Vause jdv at iglou.com
Thu Mar 1 19:53:01 UTC 2007


I'm not using the X1W. I have the original humidity sensor that Dallas
Semi sold.

wn0x at earthlink.net wrote:
> John,
> 
> Is the "T" shunt in place on the X1W?  When setting up the T238 for temperature I completely removed my wind sensor from the network and left the X1W in place.  The T238 correctly identified the DS18S20 on the X1W.  I thought the firmware listed temperature sensors if it saw more than one.
> 
> Rich
> 
> 
> -----Original Message-----
>> From: John Vause <jdv at iglou.com>
>> Sent: Mar 1, 2007 9:07 AM
>> To: TAPR Weather Station SIG Mailing List <wxsig at lists.tapr.org>
>> Subject: Re: [wxsig] wind sensor prob
>>
>> I just tried this (had the wind sensor down to replace a wind direction
>> reed switch).
>> Once I unsoldered the temp sensor on the wind sensor board I could not 
>> set any temp sensor in the T238 (1.15.8 firmware) setup including the 
>> temp sensor on the humidity sensor board.
>>
>> William Beals wrote:
>>> Rich:
>>>
>>> I don't think there's harm in leaving the sensor there.  For the times it
>>> really needs to digitize the temperature I do put the 1-wire bus in the
>>> "strong drive" mode per the device spec, so the only extra power should be
>>> for the 1-wire interface itself, not the temperature sensor.    It would
>>> certainly cut down on confusion though to see only one sensor! 
>>>
>>> will
>>>
>>> -----Original Message-----
>>> From: wxsig-bounces at lists.tapr.org [mailto:wxsig-bounces at lists.tapr.org] On
>>> Behalf Of wn0x at earthlink.net
>>> Sent: Wednesday, February 28, 2007 4:05 PM
>>> To: TAPR Weather Station SIG Mailing List
>>> Subject: RE: [wxsig] wind sensor prob
>>>
>>> John, 
>>>
>>> I noticed that my error rate dropped to almost nothing once I supplied 5
>>> volts to my X1W Humidity/Temp sensor and used it for temperature.
>>>
>>> Will,  Do you think there would be any value to removing the Temp sensor
>>> from the weather head unit if not used?  Does it draw power even if not
>>> queried for temperature?
>>>
>>> Rich wn0x/ap006
>>>
>>> -----Original Message-----
>>>> From: John Yost <k3yjp at yahoo.com>
>>>> Sent: Feb 28, 2007 4:25 PM
>>>> To: TAPR Weather Station SIG Mailing List <wxsig at lists.tapr.org>
>>>> Subject: RE: [wxsig] wind sensor prob
>>>>
>>>> Will:
>>>>
>>>> Good News.  It works!
>>>>
>>>>  Don't know for sure what the problem was but temp, speed and 
>>>> direction are working fine.  I am suppling the +5 to the temp sensor 
>>>> since it does not work without it.  I think it should work without 
>>>> doing that, but I intend to connect a X1W-2v2 Outdoor Humidity and 
>>>> Temperature Sensor for that purpose.
>>>>
>>>> Received the DS1994 today and intend to add that directly to the T238, 
>>>> after "programming" it on the pc.
>>>>
>>>> The modem is sending packets that I can see in UI-View, but I haven't 
>>>> seen anything show up on any of the APRS activity sites like findu.com.  
>>>> Not being an APRS person I presume its okay since I did recieve its 
>>>> signal(connected to HTX-202) and that of many others.
>>>> Its been connected for a good 24 hours and still no sign of me on 
>>>> findu.
>>>>
>>>> Thanks for your help and a terrific project.  And, this 1-wire network 
>>>> is something.  I was surprised at what can be done with it...some 
>>>> projects are swirling in my head.
>>>>
>>>> john
>>>>
>>>>
>>>> --- William Beals <will at beals5.com> wrote:
>>>>
>>>>> John:
>>>>>
>>>>> Those current numbers look a little suspicious.  The 1-wire bus and 
>>>>> the AAG sensor are totally powered through a single 1.5K ohm pullup 
>>>>> and a digital logic "active high" drive.  The only sensor I know of 
>>>>> that requires power outside that is the BP sensor that does reqire a 
>>>>> dedicated +5V wire.  Maybe you were measuring microamps?  The 
>>>>> voltages on that bus do vary quite a bit due to it being both a power 
>>>>> bus as well as a data bus.  If you'd like to learn more about it, any 
>>>>> of the 1-wire device datasheets has a decent overview of the 
>>>>> protocol, for example
>>>>>
>>>> http://datasheets.maxim-ic.com/en/ds/DS1990A-F3-DS1990A-F5.pdf.
>>>>> Good luck on the modem.  The tricky part for that is getting the 
>>>>> audio levels and keying for your radio.  Other than general 
>>>>> guidelines, I don't offer much advice in the manuals.  If you do run 
>>>>> into problems post here as there are quite a few folk who have gone 
>>>>> through it before.
>>>>>
>>>>> I totally understand the frustration!  Having built my stations quite 
>>>>> a while ago, it has been a while since I've gone through the hardware 
>>>>> gyrations, but am going through a new project right now where I've 
>>>>> made some inintended smoke!  It is probably going to take at least 
>>>>> 2-3 weeks to get "basic life" out of it.  Patience isn't my strong 
>>>>> point.
>>>>>
>>>>> will
>>>>>
>>>>> -----Original Message-----
>>>>> From: wxsig-bounces at lists.tapr.org
>>>>> [mailto:wxsig-bounces at lists.tapr.org] On Behalf Of John Yost
>>>>> Sent: Sunday, February 18, 2007 1:55 PM
>>>>> To: TAPR Weather Station SIG Mailing List
>>>>> Subject: RE: [wxsig] wind sensor prob
>>>>>
>>>>> Latest update,
>>>>>
>>>>> The voltages at the processor pins for the 1-wire bus are the same at 
>>>>> the connector - maybe I wasn't on the right pins before, it was 
>>>>> getting late.
>>>>>
>>>>> The unit seems to be working fine so far.  I measured the current 
>>>>> draw for the AAG Electronica V3 sensor and, not surprisingly, found 
>>>>> it varied all over.  The
>>>>> +5 power line ran 20-240 ma and the 1-wire bus is
>>>>> 30-210ma.  Not sure, but that looks like a lot of current for this 
>>>>> device.
>>>>> Seems that the T238 wouldn't want to support many devices if they all 
>>>>> draw this kind of current.
>>>>>
>>>>> Now, lets see if the modem will send, haven't seen the LED's light 
>>>>> yet, hopefully I just haven't caught them.
>>>>>   They worked during the circuit test.
>>>>>
>>>>> This sure has been a fun experience, in spite of the frustration for 
>>>>> a while.
>>>>>
>>>>> Thanks for any suggestions.
>>>>>
>>>>> john
>>>>>
>>>>>
>>>>>
>>>>> --- John Yost <k3yjp at yahoo.com> wrote:
>>>>>
>>>>>> Tnx will,
>>>>>> I am using the AAG Electonica v3 weather senors. 
>>>>>> Modem  board not connected.
>>>>>>
>>>>>> Bus voltage was 4.94, Bat volt = 8.8 from the
>>>>> status screen.
>>>>>> Measured bus voltage varied from 4.6 to 4.94.  I
>>>>> suspect that the
>>>>>> voltage probably dropped lower but my meter isn't
>>>>> fast enough to track
>>>>>> it.
>>>>>>
>>>>>> Cleaned the RJ11 and that seemed to help some, got
>>>>> wind direction.
>>>>>> Poked around on the board and found that the
>>>>> voltage at the processor
>>>>>> (pins 23,24,25) is steady at 4.94 volts, but it
>>>>> was jumping around at
>>>>>> the connector.
>>>>>> Redid all the solder joints - no improvement.
>>>>>>
>>>>>> Since the AAG will accept external power and the
>>>>>> T238
>>>>>> can supply that power, I connected those lines. 
>>>>>> Works
>>>>>> great.  Temp, wind speed and direction and error
>>>>> counters are all
>>>>>> zero!  Bus voltage still jumps around as before.
>>>>>>
>>>>>> I'm going to try putting a jumper from the
>>>>> processor to R16 to see if
>>>>>> that will improve that connect.
>>>>>> Also, I need to check the actual value of R16,
>>>>> guess it could be off.  
>>>>>> Would like to see it work properly before
>>>>> expanding to other sensors.
>>>>>> Thoughts?
>>>>>>
>>>>>> john
>>>>>>
>>>>>>
>>>>>>
>>>>>> --- William Beals <will at beals5.com> wrote:
>>>>>>
>>>>>>> John:
>>>>>>>
>>>>>>> It does smell of some kind of intermittent
>>>>> communication error of
>>>>>>> some kind.
>>>>>>> Firstest and easiest thing to try is check
>>>>> things out on your bench
>>>>>>> with nice short cables to all the sensors.  If
>>>>> problems are ony with
>>>>>>> longer cables, that is a unique debugging
>>>>> strategy.
>>>>>>> If the problem is on your bench, then check for
>>>>> standard stuff like
>>>>>>> dry solder joints on all the components
>>>>> associated
>>>>>> with
>>>>>>> the 1-wire interface,
>>>>>>> including the connector.  It may not hurt to
>>>>> insert/remove the RJ11
>>>>>>> jacks a dozen times in case some flux may be on
>>>>> the connectors.
>>>>>>> Something else to check is the 1-wire bus
>>>>> voltage.
>>>>>>> One of the display
>>>>>>> screens while you are showing wx data will show
>>>>>> the
>>>>>>> bus voltage.
>>>>>>> Additionally check the bus voltage at the T238
>>>>> connector and sensor
>>>>>>> with a voltmeter, if all are >4.5V life is good,
>>>>> if any
>>>>>> is
>>>>>>> low, let us know.
>>>>>>>
>>>>>>> Also, if not done already, ensure minimum
>>>>> sensors
>>>>>> on
>>>>>>> the network to see if
>>>>>>> it an individual sensor that may be messing with
>>>>>> the
>>>>>>> 1-wire bus.
>>>>>>>
>>>>>>> Hope that helps, based on your answers,
>>>>> hopefully
>>>>>> we
>>>>>>> can get an idea of
>>>>>>> where to head for round 2.
>>>>>>>
>>>>>>> will
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: wxsig-bounces at lists.tapr.org 
>>>>>>> [mailto:wxsig-bounces at lists.tapr.org] On Behalf
>>>>> Of John Yost
>>>>>>> Sent: Tuesday, February 13, 2007 9:08 PM
>>>>>>> To: wxsig at lists.tapr.org
>>>>>>> Subject: [wxsig] wind sensor prob
>>>>>>>
>>>>>>> I just finished up the T238+.  Nice kit.
>>>>>>>
>>>>>>> After a couple of power on-off cycles, the temp
>>>>> sensor has become
>>>>>>> intermittent - works for a few cycles then just
>>>>> dashes for a couple
>>>>>>> cycles.
>>>>>>> The wind direction senor stopped altogether,
>>>>> just
>>>> === message truncated ===
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________________________________
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>> -- 
>> *   My favorite law: The Law of Unintended Consequences   *
>> *                                -- John Vause            *
>> *  "Environmentalism as a metaphysical ideology and as a  *
>> *   worldview has absolutely nothing to do with natural   *
>> *   sciences or with the climate.                         *
>> *                            -- Czech Pres. Vaclav Klaus  *
>> *   Nothing brings out the opportunism in potential       *
>> *   adversaries like the appearance of being unwilling    *
>> *   to fight in self-defense -- John Vause                *
>> *   Si vis pacem, para bellum - Cicero                    *
>>
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> 
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-- 
*   My favorite law: The Law of Unintended Consequences   *
*                                -- John Vause            *
*  "Environmentalism as a metaphysical ideology and as a  *
*   worldview has absolutely nothing to do with natural   *
*   sciences or with the climate.                         *
*                            -- Czech Pres. Vaclav Klaus  *
*   Nothing brings out the opportunism in potential       *
*   adversaries like the appearance of being unwilling    *
*   to fight in self-defense -- John Vause                *
*   Si vis pacem, para bellum - Cicero                    *





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