esp8266 and water flow SEN-HZ43WB

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mrc-core
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esp8266 and water flow SEN-HZ43WB

#1 Post by mrc-core » 21 May 2019, 10:43

Hi. I'm new on using esp easy. I'm trying to build a water counter on my house using a node mcu esp8266 and a SEN-HZ43WB g3-4 here's the link for the water flow i have:
- https://www.walmart.ca/en/ip/G3-4-Hall- ... 326N63I06G
The thecnical specification for this water flow are this ones:
"Specifications:
Product Name: Water Flow Sensor
Material: Copper(Shell)
Liquid Temperature: Not More Than 60C
Start Flow Range: 1.5L/min
Flow Range: 2-45L/min
Working Voltage Range: DC4.5-18V
Max Current: 10mA
Maximum Water Pressure: 1.75MPa
Connector: Male SM-3P Plug
Cable Length: 35cm
Size: 44mm x 32mm x 30mm(L*W*H)
External Thread Diameter: G3/4 inch
Tube Length: 44mm
Color: Gold Tone
Net Weight: 112g
6. Instantaneous Flow Pulse Characteristic F=8.1 x Q(flow)-5 +/-10%
7. The cumulative flow pulse conversion ratio 1L Water=477 pluse +/- 10%"

My real problem here i think it's with the formula on the esp easy under the device i'm creating. I always getting too mutch liter's counting.
My setup under esp easy device is this one:

Device: Generic - Pulse Counter
Enabled: yes
GPIO - Pulse: GPIO-14 (D5)
Debounce Time (mSec): 100
Counter Type: Delta/Total/Time
Mode: Rising
Send to controler: yes
IDX: 2487
Interval: 10
Values: Formula Decimals
1. Counter %value%/477 0
2.Total 0
3.Time 0

With this setup i never get corret measurs.
I'm using 477 because on the specs off my flow meter i have this info "7. The cumulative flow pulse conversion ratio 1L Water=477 pluse +/- 10%"
I'm using domoticz has the main controler off my house.
Could anyone please help me on getting the correct formula for this device to work properly.

Thanks in advance

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Re: esp8266 and water flow SEN-HZ43WB

#2 Post by grovkillen » 21 May 2019, 10:46

Change the decimals to at least three!
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
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Re: esp8266 and water flow SEN-HZ43WB

#3 Post by mrc-core » 21 May 2019, 11:10

Hi thanks for the reply.
I did initialy had the value 3 on the decimals but i get two strange problems.
When water is being used on esp i do see on the counter some values but i dont get any values on the domoticz.
And when i do get values on the domoticz it's a small value 1 liter. and i don't pass this value.

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Re: esp8266 and water flow SEN-HZ43WB

#4 Post by mrc-core » 21 May 2019, 11:14

One other thing i have done on the formula was this: %value%*60/477 i did get some values but i dont believe they are rigth.
Are all the other settings i had made on the device corretc? The counter type and the mode type ??

On the formula %value%/477 is this correct ?

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Re: esp8266 and water flow SEN-HZ43WB

#5 Post by grovkillen » 21 May 2019, 12:20

What values do you get?
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Official shop: https://firstbyte.shop/
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Re: esp8266 and water flow SEN-HZ43WB

#6 Post by grovkillen » 21 May 2019, 12:22

The minimum flow seems to be 2L/minute. Do you have enough flow?
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Official shop: https://firstbyte.shop/
Sponsor ESP Easy, we need you :idea: :idea: :idea:

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Re: esp8266 and water flow SEN-HZ43WB

#7 Post by mrc-core » 21 May 2019, 12:58

On the esp easy log e get values like this:
count: 0
total: 11103
time: 104

The total and the time do change while i have water running but the count i dont see any changes.
I believe i have enought flow.

One test off my testings was a discharge off 6L having the formula like this %value%/60*477 i get a value like 17L read.
Other test i have done another discharg off 6L and the formula like this %value%/4.77 and i get values like 10L read and so on increasing.
Other test i have done another discharg off 6L and the formula like this %value%/477 i dont get any value on the count 0L.

Yesterday i had my washing machine working and i did a test like this %value%*477 and the result was something like this 3.345m3 on domoticz dummy counter... This result is not correct.

I believe the correct formula is "%value% / 477" but i dont understand why the count is zero when i see on esp log the total and the time changing.

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Re: esp8266 and water flow SEN-HZ43WB

#8 Post by grovkillen » 21 May 2019, 13:21

You zero the counter at the end of the set interval. Given that you have a flow of lets say 2L per minute you will have 2 * 477 pulses per minute. That's 159 per 10 seconds (which is the interval you have). So the formula would then compute 159/477 since %value% is 159. That's 0.33.......333 L but given that you have zero decimals the computed value is rounded down to zero.

So my suggestion is to increase either decimals and/or interval.
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Official shop: https://firstbyte.shop/
Sponsor ESP Easy, we need you :idea: :idea: :idea:

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Re: esp8266 and water flow SEN-HZ43WB

#9 Post by mrc-core » 21 May 2019, 15:01

So i'm going to increase the decimals to 3. And i'm have also changing the interval to 60, and the formula i'm leaving it as %value%/477.
Hope this will fix my problem.
Thanks for all the help. i'm not at home at this moment but at night ill say something.
Once again thanks.

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Re: esp8266 and water flow SEN-HZ43WB

#10 Post by Icestan » 21 May 2019, 20:37

Hallo mrc-core,

I'm surprised that you even get a value. On my site after 4 seconds the esp-Module make a reset.
I have the same sensor build in. Lastly, I revised the power supply and used a DC-DC converter for the ESP and the flow sensors.
But without success.
Of course, I have also considered a stepdown unit (to 3.3V) for the GPIOs.

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Re: esp8266 and water flow SEN-HZ43WB

#11 Post by mrc-core » 21 May 2019, 22:49

Hi again now that i'm at home i can do some testings. Here are the results:
Using this settings:
Debounce time: 100
Interval: 60
Formula: %value%/477

My log over esp is this one:
"
LogCopy log to clipboard (⋄)
Logging: Info (2)
40471928: WD : Uptime 675 ConnectFailures 0 FreeMem 12816 WiFiStatus 3
40473078: EVENT: Contador_agua#Count=0.00
40473082: EVENT: Contador_agua#Total=8150.00
40473085: EVENT: Contador_agua#Time=118.00
40473089: Domoticz: Sensortype: 6 idx: 2487 values: 0.000;8150.000;118.000
40483077: EVENT: Contador_agua#Count=0.00
40483082: EVENT: Contador_agua#Total=8150.00
40483085: EVENT: Contador_agua#Time=118.00
40483088: Domoticz: Sensortype: 6 idx: 2487 values: 0.000;8150.000;118.000
40493077: EVENT: Contador_agua#Count=0.00
40493082: EVENT: Contador_agua#Total=8151.00
40493085: EVENT: Contador_agua#Time=140262.00
40493088: Domoticz: Sensortype: 6 idx: 2487 values: 0.002;8151.000;140262.000
40501929: WD : Uptime 675 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
40503077: EVENT: Contador_agua#Count=0.19
40503082: EVENT: Contador_agua#Total=8242.00
40503085: EVENT: Contador_agua#Time=111.00
40503088: Domoticz: Sensortype: 6 idx: 2487 values: 0.191;8242.000;111.000
40513077: EVENT: Contador_agua#Count=0.19
40513082: EVENT: Contador_agua#Total=8334.00
40513086: EVENT: Contador_agua#Time=119.00
40513090: Domoticz: Sensortype: 6 idx: 2487 values: 0.193;8334.000;119.000
40523077: EVENT: Contador_agua#Count=0.12
40523082: EVENT: Contador_agua#Total=8389.00
40523085: EVENT: Contador_agua#Time=211.00
40523088: Domoticz: Sensortype: 6 idx: 2487 values: 0.115;8389.000;211.000
40531928: WD : Uptime 676 ConnectFailures 0 FreeMem 13040 WiFiStatus 3
Autoscroll:


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On the device i have this:

Code: Select all

       Task Enabled               Device                              Name              IDX             GPIO            
Edit	  1	   ✔	     Generic - Pulse counter	Contador_agua     ❶(2487)  	GPIO-14	    Count:0
                                                                                                       Total:8433
                                                                                                       Time:137

Has you can see i do get a value under the "Contador_agua#Count=0.012"
And on the "Domoticz: Sensortype: 6 idx: 2487 values: 0.115;8389.000;211.000" the strange thing in here is that i don´t receive any value on the domoticz dummy counter sensor.

How can this be fix?

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Re: esp8266 and water flow SEN-HZ43WB

#12 Post by mrc-core » 21 May 2019, 22:58

Icestan wrote:
21 May 2019, 20:37
Hallo mrc-core,

I'm surprised that you even get a value. On my site after 4 seconds the esp-Module make a reset.
I have the same sensor build in. Lastly, I revised the power supply and used a DC-DC converter for the ESP and the flow sensors.
But without success.
Of course, I have also considered a stepdown unit (to 3.3V) for the GPIOs.
Hi Icestan at my first try i did not get any values at all. I only start receiving values when i had connect the sensor to the GPIO D5. Has my power i'm using the internal 3v from my nodemcu esp8266. All my sensors on this part off my house are conected to a 12v 5A power supply and then i have a stepdown to 5.2V on were i connect all my esp8266 sensors.

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Re: esp8266 and water flow SEN-HZ43WB

#13 Post by mrc-core » 21 May 2019, 23:07

New testings, after a reboot i did see a value off 1L on domoticz dummy counter. But not for too mutch time. Once i turned off the water my dummy counter sensor displays 0L.... This is strange for me.

The new log is this one:
41578645: EVENT: Contador_agua#Count=0.00
41578650: EVENT: Contador_agua#Total=8451.00
41578653: EVENT: Contador_agua#Time=178.00
41578656: Domoticz: Sensortype: 6 idx: 2487 values: 0.000;8451.000;178.000
41581928: WD : Uptime 693 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41611928: WD : Uptime 694 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41638646: EVENT: Contador_agua#Count=0.65
41638650: EVENT: Contador_agua#Total=8762.00
41638653: EVENT: Contador_agua#Time=106.00
41638656: Domoticz: Sensortype: 6 idx: 2487 values: 0.652;8762.000;106.000
41641928: WD : Uptime 694 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41671928: WD : Uptime 695 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41698645: EVENT: Contador_agua#Count=1.18
41698650: EVENT: Contador_agua#Total=9327.00
41698653: EVENT: Contador_agua#Time=107.00
41698657: Domoticz: Sensortype: 6 idx: 2487 values: 1.184;9327.000;107.000
41701928: WD : Uptime 695 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41731928: WD : Uptime 696 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41758645: EVENT: Contador_agua#Count=1.19
41758650: EVENT: Contador_agua#Total=9894.00
41758653: EVENT: Contador_agua#Time=106.00
41758657: Domoticz: Sensortype: 6 idx: 2487 values: 1.189;9894.000;106.000
41761928: WD : Uptime 696 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41791928: WD : Uptime 697 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41818646: EVENT: Contador_agua#Count=1.19
41818650: EVENT: Contador_agua#Total=10461.00
41818653: EVENT: Contador_agua#Time=105.00
41818656: Domoticz: Sensortype: 6 idx: 2487 values: 1.189;10461.000;105.000
41821928: WD : Uptime 697 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41851928: WD : Uptime 698 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41878653: EVENT: Contador_agua#Time=357.00
41878657: Domoticz: Sensortype: 6 idx: 2487 values: 0.249;10580.000;357.000
41879852: SaveToFile: free stack: 3200
41880052: FILE : Saved config.dat
41880052: SaveToFile: free stack after: 3200
41880059: SaveToFile: free stack: 3264
41880264: FILE : Saved config.dat
41880264: SaveToFile: free stack after: 3264
41880269: FS : Daily flash write rate exceeded! (powercycle to reset this)
41880275: INIT : Pulse 14
41880387: EVENT: Contador_agua#Count=0.00
41880392: EVENT: Contador_agua#Total=10580.00
41880395: EVENT: Contador_agua#Time=357.00
41880399: Domoticz: Sensortype: 6 idx: 2487 values: 0.000;10580.000;357.000
41881928: WD : Uptime 698 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
41890840: FS : Daily flash write rate exceeded! (powercycle to reset this)
41890846: FS : Daily flash write rate exceeded! (powercycle to reset this)
41890849: FS : Daily flash write rate exceeded! (powercycle to reset this)
41890851: INIT : Pulse 14
41890958: EVENT: Contador_agua#Count=0.00
41890963: EVENT: Contador_agua#Total=10580.00
41890967: EVENT: Contador_agua#Time=357.00
41890970: Domoticz: Sensortype: 6 idx: 2487 values: 0.000;10580.000;357.000
41911928: WD : Uptime 699 ConnectFailures 0 FreeMem 13064 WiFiStatus 3
Autoscroll:
Is there any setting under the device that is making my sensor to display zero value ?

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Re: esp8266 and water flow SEN-HZ43WB

#14 Post by mrc-core » 21 May 2019, 23:30

I'm doing some testings over here. One question. Which sensor have you created on domoticz side?
Just Counter? or Counter incremental?

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Re: esp8266 and water flow SEN-HZ43WB

#15 Post by Domosapiens » 21 May 2019, 23:42

@mrc-core.
I use comparable flow counters.
https://nl.aliexpress.com/item/32788046 ... Title=true
with a slightly more convenient specification.

The website specification of your source is incomplete/inconsistent:
7. The cumulative flow pulse conversion ratio 1L Water=477 pluse +/- 10%"
Must be
1L/min=477 pulses +/- 10%

6. Instantaneous Flow Pulse Characteristic F=8.1 x Q(flow)-5 +/-10%
Q=1liter for 1 minute = 60x 8.1 x 1 - 5= 481 pulses
- The minus 5 is difficult for the counter formula, if Q=0 then F would be -5 ????
- the start flow is rather high
- the maximum flow is rather high (for drinking water)

Now with this knowledge, set:
Interval 60 sec.
Formula for the counter is %value%/477 ... that means you measure a number of pulses per minute and every 477 equals 1 liter.

The maximum test for ESP8266 that I did was 150Hz (22L/min in my case) With the limited reporting interval (60sec) that worked.
Flow meter connected to 5V and used a 3.3V to 5V level shifter.
Debounce on 0 (clean digital signal)

In Domoticz I use a sensor Type General, SubType Waterflow and get this as flow from my floor heating.
Image

Most recent stability improvement discussed here: https://github.com/letscontrolit/ESPEasy/pull/2469,
will be avail. tomorrow
30+ ESP units for production and test. Ranging from control of heating equipment, flow sensing, floor temp sensing, energy calculation, floor thermostat, water usage, to an interactive "fun box" for my grandson. Mainly Wemos D1.

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Re: esp8266 and water flow SEN-HZ43WB

#16 Post by mrc-core » 22 May 2019, 01:39

Domosapiens thanks for your replay.
I have done the changes you have told and on my testing always doing a discharge off 6L my water flow is giving me the correct measure value in this case 6L.
On domoticz i have created a new sensor different than yours. I have used this one, General, Counter incremental.
The two discharges made yesterday give me a total of 0.012m3 on domoticz sensor and a 00:00 the sensor made the reset to 0 has normal. A new test at 00:10 again 6L and again the sensor give the corret value and the sensor added the value to the total count, for me these is good and is what i need.

Here's the log of my test:
120613: EVENT: Contador_agua#Count=3.09
120618: EVENT: Contador_agua#Total=1474.00
120621: EVENT: Contador_agua#Time=11.00
120624: Domoticz: Sensortype: 5 idx: 2495 values: 3.088;1474.000
121916: WD : Uptime 2 ConnectFailures 0 FreeMem 13920 WiFiStatus 3
151916: WD : Uptime 3 ConnectFailures 0 FreeMem 15448 WiFiStatus 3
180613: EVENT: Contador_agua#Count=2.77
180618: EVENT: Contador_agua#Total=2797.00
180621: EVENT: Contador_agua#Time=169.00
180624: Domoticz: Sensortype: 5 idx: 2495 values: 2.774;2797.000
181916: WD : Uptime 3 ConnectFailures 0 FreeMem 15264 WiFiStatus 3
211916: WD : Uptime 4 ConnectFailures 0 FreeMem 15264 WiFiStatus 3
240613: EVENT: Contador_agua#Count=0.00
240618: EVENT: Contador_agua#Total=2797.00
240621: EVENT: Contador_agua#Time=169.00
240624: Domoticz: Sensortype: 5 idx: 2495 values: 0.000;2797.000
I'll be making more testings over this sensor and configuration.
One thing i have noticed is that if i made 1L disharge i don't get any values but tomorrow ill see this again.

Thanks for all the help

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Re: esp8266 and water flow SEN-HZ43WB

#17 Post by mrc-core » 24 May 2019, 16:23

In the last two days i have been workin on this sensor. Up until now i have seen that this sensor is not giving reads under 1 Liter and the day counter has a difference comparing it to my water supplyer.
I steel have some doubts about this value "477 pulses" for 1L.... in some situatios for example a discharg off 6L i get an accurate reading but the difference in the end off the day comparing this water flow with my water supplyer i would like to fix this difference.

Heres some imagens for the setup and data stored on domoticz server.

Device setup on esp easy:
flow_1.png
flow_1.png (34.5 KiB) Viewed 7669 times
flow_2.png
flow_2.png (50.55 KiB) Viewed 7669 times
Data stored on domoticz side:
flow_3.png
flow_3.png (162.44 KiB) Viewed 7669 times
Hope this can help others on setting up this and other identical water flows.
And thanks to all that gived me a hand on making this water flow work.

Edit my post to show the images.
Last edited by mrc-core on 24 May 2019, 17:39, edited 1 time in total.

Icestan
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Re: esp8266 and water flow SEN-HZ43WB

#18 Post by Icestan » 24 May 2019, 17:11

Hello,
thanks for your analyzes.
I hope, when my project is ready, that I can use your information with me.
Could you please share the Images of your settings, I don´t see that.

By the way, at first you also had such effects when setting up your flow sensor.
Look at my Threat "ESP32 - Waterflow sensor causes panic"

Best regards
Icestan

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Re: esp8266 and water flow SEN-HZ43WB

#19 Post by mrc-core » 24 May 2019, 17:45

Icestan wrote:
24 May 2019, 17:11
Hello,
thanks for your analyzes.
I hope, when my project is ready, that I can use your information with me.
Could you please share the Images of your settings, I don´t see that.

By the way, at first you also had such effects when setting up your flow sensor.
Look at my Threat "ESP32 - Waterflow sensor causes panic"

Best regards
Icestan
Hi Icestan. I never had any problem like yours on my water flow meter. My only problem was really the one i described here. I had only one issue when i told that my gpio port was the D2 and whem my meter start workin the esp wifi led went crazy.
I have change my last post to shwo the images from my sensor.
The only thing that comes to my mind is that problably your problem is related to the ports on the esp that you hook up your water flow.

Bests regards

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Re: esp8266 and water flow SEN-HZ43WB

#20 Post by Domosapiens » 24 May 2019, 23:16

Up until now i have seen that this sensor is not giving reads under 1 Liter and the day counter has a difference comparing it to my water supplyer.
I steel have some doubts about this value "477 pulses"
has a difference ....
more then the official meter ?? ... less ..?
within 10% ??

In case your pulse counter is lower than the official meter:
Minimum values are (too) high:
Start Flow Range: 1.5L/min
Flow Range: 2-45L/min
.... Buy a more accurate model, if you can deal with a less maximum value (see my link to a 1-30L/min version)


In case your pulse counter is higher than the official meter, you could try:

6. Instantaneous Flow Pulse Characteristic F=8.1 x Q(flow)-5 +/-10%
Q=1liter for 1 minute = 60x 8.1 x 1 - 5= 481 pulses
Formula for the counter is %value%/481 ... that means you measure a number of pulses per minute and every 481 equals 1 liter.
30+ ESP units for production and test. Ranging from control of heating equipment, flow sensing, floor temp sensing, energy calculation, floor thermostat, water usage, to an interactive "fun box" for my grandson. Mainly Wemos D1.

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Re: esp8266 and water flow SEN-HZ43WB

#21 Post by mrc-core » 27 May 2019, 10:13

The difference is less than the official meter.
On saturday i had to give the water total that i spent last month and the difference was less than 100L.
Now lets not forget that i started this project on 21 off May and i give my readings on saturday 25 sow in 4 days i had a difference off 100L its a bit too high this differenc.

I'm thinking on trying another water flow meter like you said Domosapiens.
In the end off the month i want to have the most accurate readings and history off my water has possible.

Why? Because my water meter is ons a difficult place to access and i'm suspecting that my water provider is not being correct on my readings.

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Re: esp8266 and water flow SEN-HZ43WB

#22 Post by mrc-core » 27 May 2019, 10:51

Domosapiens what are the best values for the flow meter? A low start flow range let's say 1L/min or less than 1l/min ?
or the flow range between the 1-30 L/min ???

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Re: esp8266 and water flow SEN-HZ43WB

#23 Post by Domosapiens » 28 May 2019, 10:09

My use is in a heating system with a pump, so a minimal flow is guaranteed. My maximum is 25L/min. Therefor my choice for 30L/min.
This is my way for drinking water: viewtopic.php?f=2&t=5955#p33231

In your case, I understand, it's for drinking water (max 15L/min?)
Check your maximum flow/min with a sink.

There are many versions with different capacity
https://nl.aliexpress.com/store/1872079 ... 15b7OTRM2g
Limit your maximum choice as much as possible, the better the low flow resolution.

Avoid units with a constant factor like your "-5" in the formula F=8.1 x Q(flow)-5
On this page I see a kind of overview:
https://nl.aliexpress.com/item/32695738 ... 34ffHW5B0p
30+ ESP units for production and test. Ranging from control of heating equipment, flow sensing, floor temp sensing, energy calculation, floor thermostat, water usage, to an interactive "fun box" for my grandson. Mainly Wemos D1.

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