Author Topic: Difference in rain recorded from same WH40 by GW1000 and GW1100?  (Read 1252 times)

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Online broadstairs

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Difference in rain recorded from same WH40 by GW1000 and GW1100?
« on: September 11, 2022, 05:27:27 AM »
I have seen on more than one occasion a difference in the recorded rain usually by only 0.1mm or 0.2mm in my two gateways which receive data from the same WH40. Does anyone else see this if they have the same config? I should add that both the GW1000 and GW1100 have their respective latest f/w.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline box

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #1 on: September 11, 2022, 08:37:19 AM »
Maybe it's a difference in the way values are rounded ?

Offline DelChard

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #2 on: September 11, 2022, 09:27:08 AM »
Possibly timing.
My WH40 reports to one of my GW1100s and my HP2550.
Occasionaly the values are slighty off but the daily, weekly and monthly totals are identical.

Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #3 on: September 11, 2022, 01:26:57 PM »
Both gateways have identical settings and it has happened both ways round either GW1100 > GW1000 and GW1000 > GW1100. Last occurrence was around midnight 9/10 Sep. Probably around 6-8 times in the past 6 months since running WD on one and CumulusMX on the other both using the ip interfaces.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline DelChard

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #4 on: September 11, 2022, 02:58:32 PM »
Originally I had just 2 gateways both using the same sensors, and I had noticed the odd behaviour.
It was only when I had both of my ecowitt IDs open that the penny dropped.
A screen grab of my 3 gateway/consoles showing the seconds since posting. They are all set to 60 secs.
These timings vary, there is a post (I think olicat) where it is explained that the 60sec post time is actually 60 secs from the completion of the previous post.
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And an example of the last rain values for my WH40 viewed from 2 devices on ecowitt.net.
The totals at the end are both 0.47in, but the max rain rate is out of sync, and there's an obvious difference just after 14:00.
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Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #5 on: September 11, 2022, 04:59:17 PM »
I am not talking about posts to Ecowitt but both WD am CMX obtaining data via IP addresses locally, yes they probably are getting it at slightly different times but that is not what I am comparing. I am looking at the daily, weekly and yearly totals and they are different  when it stops raining or even at the end of the day. One gateway has missed one, two or even more tips from the WH40 and not always the same gateway having an increase in the totals, could be either.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline box

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #6 on: September 12, 2022, 03:33:24 AM »
I am not talking about posts to Ecowitt but both WD am CMX obtaining data via IP addresses locally, yes they probably are getting it at slightly different times but that is not what I am comparing. I am looking at the daily, weekly and yearly totals and they are different  when it stops raining or even at the end of the day. One gateway has missed one, two or even more tips from the WH40 and not always the same gateway having an increase in the totals, could be either.

Stuart
are the gateways in different locations? Could there be a reception difference?

Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #7 on: September 12, 2022, 03:59:17 AM »
]are the gateways in different locations? Could there be a reception difference?

Yes they are but neither is far away and the furthest is the GW1100 but only by some15-20 feet. However in that case I would expect the GW1100 to miss more tips but that's not the case it can be either.

Also both show the same reception stats. I've never seen lass than a 4 on both gateways for signal on the WH40. Unfortunately my WH40 is one which does not transmit battery data.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline box

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #8 on: September 12, 2022, 04:50:26 AM »
]are the gateways in different locations? Could there be a reception difference?


Yes they are but neither is far away and the furthest is the GW1100 but only by some15-20 feet. However in that case I would expect the GW1100 to miss more tips but that's not the case it can be either.

Also both show the same reception stats. I've never seen lass than a 4 on both gateways for signal on the WH40. Unfortunately my WH40 is one which does not transmit battery data.

Stuart

Anything in the area that might dynamically change reception like a radio, speaker, Alexa type device?

It's very odd 🙃

Offline DelChard

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #9 on: September 12, 2022, 05:44:21 AM »
Apologies if I ruffled anyone's feathers.
I used the Ecowitt data as an easy way to graphically show what I've seen.
Merging 2 weewx instances and my cumulus database wouldn't be so straightforward.

Again, apologies in advance, if you don't believe this to be relevant.

I believed my sensors never missed a beat, until 1 of my sensors failed and didn't trigger the weewx alarm I had configured.
Confused, I sat watching the weewx driver in test mode.
I had a sensor with me.
I removed the batteries.
I watched the signal count decrease ( it actually goes down in 0.3333 intervals ).
I let it go down to 0
I noticed a peculiarity.
The gateway continued to transmit the last received sensor value all the time the signal count was dropping.
Further it did this for quite some time after the signal count had reduced to zero.

As I have sensors in both our freezers, with alarms set should the temperature rise. I realised that if one of those sensors failed I still wouldn't know.
Consequently I added the ability to record my sensor signals and set alarms should they drop to 3.
To my surprise, I was flooded with emails.
I then added charts for all my signal levels (unfortunately I only have this ability on one of my weewx instances).
My gateways are only 30in apart, my console about 20ft from the gateways.
The chart is yesterdays main sensor signals (I have separate charts for my soil sensors and extra temperature signals).

From a curiosity point of view, I am now going to add the same ability to my other 2 weewx instances.

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Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #10 on: September 12, 2022, 06:03:17 AM »
There is nothing which could cause issues like an Alexa etc, we have had no new tech for the whole time I've been using the Ecowitt kit in early 2021 after my VP1 finally failed. As for alarms I will look into this.


Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline olicat

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #11 on: September 12, 2022, 06:08:19 AM »
Hi!

Quote
Further it did this for quite some time after the signal count had reduced to zero.
This behaviour has been known for some time. It takes 10 minutes until the (old) values are no longer sent.
I help myself by checking the presence of the corresponding batt keys. If it is missing, the value cannot be trusted.

Of course, it is not helpful if it concerns a WH40 that does not send a wh40batt.

Oliver

Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #12 on: September 12, 2022, 06:15:18 AM »
I think right now I'll replace the battery(s) in the WH40 anyway just in case.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline DelChard

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #13 on: September 12, 2022, 06:25:51 AM »
Hi!

Quote
Further it did this for quite some time after the signal count had reduced to zero.
This behaviour has been known for some time. It takes 10 minutes until the (old) values are no longer sent.
I help myself by checking the presence of the corresponding batt keys. If it is missing, the value cannot be trusted.

Of course, it is not helpful if it concerns a WH40 that does not send a wh40batt.

Oliver

I'm shortly going to run my GW1000/1100 driver in test mode again.

But I seem to remember that the batt level also continued to be transmitted.
It was only the wh40_sig that was a reliable indicator.

As an aside, I just realised that cumulusmx is similarly affected, as I had the battery removed from my WH40 yesterday for about 5mins and didn't get a lost sensor alarm.

Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #14 on: September 12, 2022, 07:22:15 AM »
I changed the battery and just checked the old one with my digital volt meter and it still showed 1.7 volts. It is an Energizer Ultimate  lithium one and has been in there for a very long time, over a year I think, so that was not the issue.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline DelChard

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #15 on: September 12, 2022, 08:06:30 AM »
OK
I ran the driver in test mode.
First observation...not all sensors show the same level of granularity with respect to the sig values.
Removed battery from my WH57
Took about 5 mins for the wh57_sig to drop to 0 (dropped in steps of 1)
wh57_batt stayed at 5 until wh57_sig reported 0 then went to null.

For a future comparison, I have now configured the ability to compare my WH57 (Lightning) and my WH35 (Leaf wetness) Signals across both my gateways. Just need to wait until I have enough data.

I would have liked to have compared my WH40 between the gateway and the console, but unfortunately it would appear (used EAR) that the interceptor driver doesn't cater for the signals (I use Werner Krebb's version).

There is already a small discrepancy showing between the gateways.
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Online mcrossley

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #16 on: September 12, 2022, 09:23:56 AM »
From the radio decodes in RTL433 it seems the tip counter is possibly 4 bytes. So you would not expect missed radio packets to affect the totals, the rain would just be added on when the next packet is received. The "tip" is not a transient thing, it increments a counter, just avoid these type of problems.
Mark

Offline Mapantz

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #17 on: September 13, 2022, 06:52:58 AM »
I have seen on more than one occasion a difference in the recorded rain usually by only 0.1mm or 0.2mm in my two gateways which receive data from the same WH40. Does anyone else see this if they have the same config? I should add that both the GW1000 and GW1100 have their respective latest f/w.

Stuart

I used to have a similar problem, but it was the GW1000 and the 2550 console. They were both situated next to each other, but at random times during rain, one or the other would show more rain than the other one.


Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #18 on: September 13, 2022, 06:56:35 AM »
I used to have a similar problem, but it was the GW1000 and the 2550 console. They were both situated next to each other, but at random times during rain, one or the other would show more rain than the other one.

Did you ever solve it?

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline Mapantz

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #19 on: September 13, 2022, 07:00:19 AM »
I used to have a similar problem, but it was the GW1000 and the 2550 console. They were both situated next to each other, but at random times during rain, one or the other would show more rain than the other one.

Did you ever solve it?

Stuart

Unfortunately not, I gave up and left it as it was.

It was impossible to find out which one was telling the truth lol


Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #20 on: September 14, 2022, 05:51:04 AM »
I decided to raise this issue with Ecowitt support. Their initial response was the usual about installing away from interference and using the USB extension cable all of which I have done. They also suggested it could be a dropout of the sensor connection to the gateway but this would normally be up to 2 hours which is rubbish as this morning my GW1000 was 0.1mm ahead of the GW1100 during todays rain event so neither could have a dropout of anything other than very short. I corrected the GW1100 and now after a while the GW1100 has recorded 0.1mm more than the GW1000!!!. Both are still continuing to advance and the difference is still only 0.1mm.

I have updated support with this and am waiting for a response.

Stuart
« Last Edit: September 14, 2022, 05:52:40 AM by broadstairs »
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #21 on: October 23, 2022, 06:09:15 AM »
I am still seeing this issue from time to time. This morning my GW1000 has received 0.1mm less rain in the middle of a rain shower when compared to my GW1100 so it is staying 0.1mm behind in rain total. This means that the supposition that the WH40 sends a total count of tips on each transmission is incorrect because if it did then on subsequent transmissions it would catch up, however this NEVER happens and at the end of the shower I have to manually correct the lower total on which ever gateway has missed rain.

I believe because of this some folks with only one gateway will be losing rain amounts over time which is completely unacceptable.

I will chase Ecowitt once again.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline Rocketman

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #22 on: February 12, 2023, 02:26:05 AM »
Any update on this Stuart ?
HP2550 console 1.9.3 , WS80 1.2.4 , WH57 lightning sensor , WH40 rain gauge , WH51 soil moisture sensor , GW1100 gateway 2.3.0

Online broadstairs

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #23 on: February 12, 2023, 03:00:13 AM »
No nothing, and it has not happened again.

Stuart
Ecowitt GW1003 with ultrasonic wind gauge, lightning sensor and PM2.5 sensor with Personal Weather Tablet as a console.

Offline Rocketman

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Re: Difference in rain recorded from same WH40 by GW1000 and GW1100?
« Reply #24 on: February 12, 2023, 03:17:22 AM »
All good , probably not worth pushing with Ecowitt then
HP2550 console 1.9.3 , WS80 1.2.4 , WH57 lightning sensor , WH40 rain gauge , WH51 soil moisture sensor , GW1100 gateway 2.3.0

 

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