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[wxsig] wind sensor prob

William Beals will at beals5.com
Sat Mar 3 03:56:32 UTC 2007


John:

That is very weird.  I will need to go see why.  Is there any chance you can
put the DS1820 back for now until I get a chance to review the code and see
what may be the issue?

will 

-----Original Message-----
From: wxsig-bounces at lists.tapr.org [mailto:wxsig-bounces at lists.tapr.org] On
Behalf Of John Vause
Sent: Friday, March 02, 2007 6:16 AM
To: TAPR Weather Station SIG Mailing List
Subject: Re: [wxsig] wind sensor prob

Will, if the wind sensor ds1820 is in the circuit the T238 does detect the
humidity sensor's temp sensor and I can select it rather than the ds1820 in
the wind sensor.

If I unsolder the wind sensor ds1820 then no temperature sensors are
detected by the T238 neither the wind sensor ds1820 or the humidity sensor's
temp sensor.

William Beals wrote:
> John:
> 
> If there is a DS1820 anywhere on the network, I should be able to detect
it.
> 
> To get the humidity sensor to also be your temperature sensor you have 
> to "re-discover" the humidity sensor again and when you do, the T238 
> should ask you if you want its temperature sensor to be the main one.  
> I must confess I've only tested this with a DS1920 on the 1-wire 
> network, so maybe I missed something.  Let me know if the sensor
re-discovery fixes things.
> 
> will
> 
> -----Original Message-----
> From: wxsig-bounces at lists.tapr.org 
> [mailto:wxsig-bounces at lists.tapr.org] On Behalf Of John Vause
> Sent: Thursday, March 01, 2007 12:53 PM
> To: wn0x at earthlink.net; TAPR Weather Station SIG Mailing List
> Subject: Re: [wxsig] wind sensor prob
> 
> 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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>>>>>
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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                    *
>>>
>>> _______________________________________________
>>> wxsig mailing list
>>> wxsig at lists.tapr.org
>>> https://lists.tapr.org/cgi-bin/mailman/listinfo/wxsig
>>
>> _______________________________________________
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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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