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RE: Is Enviro HAT working for you reliably?

ilvyanyatka — Wed, 06 Jan 2021 19:44:40 GMT

Thank you.

I use the same code to get the values.

I guess my sensor is just defective. I just don't see another explanation for such a big swing in values.

RE: Is Enviro HAT working for you reliably?

skruglewicz — Wed, 06 Jan 2021 17:51:00 GMT

Hi ilvyanyatka

Thanks so much for checking out my blog.

To answer your question, the code in the script is using a Python Classes from sensors.py.

The code for this class can be viewed in my blog testing my classes at Blog# 8.1 (Part 1 of 2) EAS - System Build

specifically at this location RoomHumidity class in the blog

I will eventually post my entire source code up to a Git Repository, soon.

I recall during testing, the script that checks the humidity, rose as the water in the glass container was running.

Hope this answers your initial question

Steve K

Is Enviro HAT working for you reliably?

ilvyanyatka — Tue, 05 Jan 2021 15:32:34 GMT

Hello,

I am having issues with Enviro HAT humidity and temperature sensors. I wonder if mine is defected or if I am missing something on how to use it. It is not snapped on Raspberry PI but connected by jumper wires.

1) The first humidity reading is often (not always) more than 90, the second and so on drops down to 30-40

2) In the same room 2 minutes apart humidity value can change up to 15 points. For example, first reading - 42, second - 27

3) Temperature value drops much below real value if humidity grows. For example, in the same room with 22C/40% humidity, if humidifier is running, next reading it 10 minutes will show 16C/55% humidity

Do you have any idea why?

TIA

RE: Is Enviro HAT working for you reliably?

ilvyanyatka — Wed, 06 Jan 2021 15:42:04 GMT

Yes, it is the exact code I am using.

I don't adjust temperature When Enviro was snapped on, the temperature reading was a couple of degrees higher. Now it seems to be accurate when humidity is around 30%. It starts returning wrong values when humidity is over 50%.

Thank you for your help. I guess my sensors are just a bit defective.

RE: Is Enviro HAT working for you reliably?

feiticeir0 — Wed, 06 Jan 2021 14:12:44 GMT

This may seem a dumb question, but have you tried with the Pimoroni's examples ?

Because - in their examples - the sensor sits on top of the Raspberry PI, they perform some calculations to remove the average cpu temperature to give a sort of accurate reading of the ambient temperature. and you don't have it that way.

Here's my code, a simple one to read the temperature/humidity (without giving in to cpu temperature):

import time
import sys

from bme280 import BME280


bme280 = BME280()


try:

    while True:
        # get data
        print ("Temp: {}".format(bme280.get_temperature()))
        print ("Hum: {}".format(bme280.get_humidity()))

        time.sleep(5)
except KeyboardInterrupt:
    sys.exit(0)

And a run of it for 60 seconds:

Temp: 22.631540955626406
Hum: 78.25451136740215
Temp: 31.840742193745086
Hum: 26.63692386637497
Temp: 31.831073930848675
Hum: 26.830281509600262
Temp: 31.831718481676603
Hum: 26.85365856716121
Temp: 31.834618960458556
Hum: 26.818467172909095
Temp: 31.838486265644406
Hum: 26.75399488327368
Temp: 31.834618960458556
Hum: 26.91790856236235
Temp: 31.83913081652463
Hum: 26.683776162340155
Temp: 31.834618960458556
Hum: 26.818467172909095
Temp: 31.825595248994887
Hum: 26.871405382322422
Temp: 31.832040757092273
Hum: 26.567011411920134
Temp: 31.829140278392174
Hum: 26.812795837825956

I have it on top of the RPI, so, the values are acceptable.

I really don't have the swings of values you describe.

Just try the code and see.

RE: Is Enviro HAT working for you reliably?

ilvyanyatka — Wed, 06 Jan 2021 07:49:11 GMT

Thank you Steve!

What exactly is in your code for

value = RoomHumidity.getValue()

Do you use bme280 object to access Enviro sensor? Something like

bus = SMBus(1)

bme280 = BME280(i2c_dev=bus)

AirHumidity = bme280.get_humidity()

Or do you use some other library/object?

Victoria

RE: Is Enviro HAT working for you reliably?

skruglewicz — Tue, 05 Jan 2021 18:49:31 GMT

Hi ilvyanyatka

I have the enviro hat connected with jumper wires and the sensor is behaving reasonable well

in My blog# 10 at this location I describe my script to check the Humidity in the growing house.

lI recall the test retuning different readings for Humidity, but the screenshots only display 88%?

I display the Humidity over time in my chart HERE

I'm away from my project this week but I'll see if I'm getting the same values as you describe.

when I get a chance.

Regards

Steve

RE: Is Enviro HAT working for you reliably?

ilvyanyatka — Tue, 05 Jan 2021 16:41:07 GMT

Thank you Bruno.

When I initially tested it while it was snapped on the PI - the first issue definitely was happening. The one with 90% of humidity readings.

It will be hard to snap it on now to test the other 2 issues because I use a lot of other GPIO pins that Enviro HAT will cover if I snap it on the PI. I will really need to disassemble the whole setup.

RE: Is Enviro HAT working for you reliably?

feiticeir0 — Tue, 05 Jan 2021 15:54:59 GMT

Hi Victoria.

I'm going to guess that the problem may be the connections - maybe the jumper wires are not well connected to the PINs or some may be faulty ? I had problems before with loose jumper wires.

Can you test it by snap the two together ?

Mine is working fine without those reading swings.

Try and test both snapped to see.

RE: Pimoroni Automation HAT mini

feiticeir0 — Thu, 12 Nov 2020 00:16:03 GMT

beware that this hat can only handle up to 24v !

RE: Pimoroni Automation HAT mini

mfetting — Wed, 11 Nov 2020 22:10:35 GMT

Interesting hat. I might consider using this if i replace an arduino project for sensing co2 level, opening and closing freshair return dampers.

Pimoroni Automation HAT mini

feiticeir0 — Fri, 06 Nov 2020 12:11:45 GMT

Hi everyone ! Hope to find you all well !

Since everyone will be using the Automation HAT mini, Pimoroni, in their blog, have a wonderful post about the Hat, written by Tanya Fish.

Just head to https://blog.pimoroni.com/automation-hat-tanya-teardown/ and read. Everything you need to know about the HAT workings and what does every output, input and relay do and how to work with them.

The post isn't really about the mini, but still applies.

They also have a getting started tutorial, but the blog post is better and more detailed (IMHO).

Happy coding .

JUST A SIDE NOTE: After reading the post, I got confused if the relay and the output wouldn't be the same thing. In a very short explanation: they are, in a sense, but the relay really cuts all the power (no electricity flowing) and the outputs still leave a bit of electricity flowing even if "turned off".

RE: Pimoroni Automation HAT mini

hugohu — Wed, 11 Nov 2020 18:01:59 GMT

Alright thank you!

RE: Pimoroni Automation HAT mini

skruglewicz — Wed, 11 Nov 2020 16:17:09 GMT

Hihugohu

I got a directory not found and then when I created the Directory and Re installed it didn’t install the examples either. That’s what I experienced. The test scripts I described in my blog worked on the automation hat so I don’t think it’s the SPI but I will investigate

steveK

RE: Pimoroni Automation HAT mini

skruglewicz — Wed, 11 Nov 2020 15:35:53 GMT

Thanks Bruno

yes I was going to do that next, and get the examples manually.
I think the SPI interface was for the environment but I’ll double check.
my tests were working as I described in my blog so I don’t think that’s the issue.
Any case thanks so much for your collaboration I’ll update my blog with my findings.
stay tuned

Steve K

RE: Pimoroni Automation HAT mini

hugohu — Tue, 10 Nov 2020 14:38:05 GMT

Hi stephen!

I did use the Curl but it did, just it finds some strange error.

Oh! You need to enable SPI!

Thanks Bruno!

Good luck everyone and happy making!

RE: Pimoroni Automation HAT mini

feiticeir0 — Tue, 10 Nov 2020 09:52:32 GMT

Hi skruglewicz !

Nice you are experimenting and helping out others.

It's true, the bash script does not install the examples. You need to clone the git repository - although you're not going to install it from source - to get the examples directory (or just download one by one ).

Their instructions are also not clear, you also need to enable the SPI interface with raspi-config (or is it for the enviro hat? I'm confused already.. )

RE: Pimoroni Automation HAT mini

skruglewicz — Tue, 10 Nov 2020 03:21:00 GMT

Hi Bruno and fellow challengers

Nice to see a few challengers experimenting with the Kit. I have been experimenting with the 2 hats.

Nice to know about what everyone is finding with the kit.

In my blog Blog# 5 EAS - Research and Unboxing of the challenge kit, I am trying to translate the existing information in the few blogs, (including the excellent one Bruno has supplied ) ,that I have found on the Internet. Fell free to comment on it's contents, if you get some time.

All the blogs that I reference in my blog , are pertaining to other models of the Hats. Which IMHO, was a bit confusing at first, but I was able to make sense with a little bit of experimenting.

I did find the blog on the Enviro helpful Getting Started with Enviro+ , and would have been nice to include the Enviro+ in the challenge, but the Enviro will do, .I did find some problems in the Automation Hat blog though. the curl install script does not install the examples? for example.

Code on

Steve K

RE: Pimoroni Automation HAT mini

feiticeir0 — Sat, 07 Nov 2020 19:22:59 GMT

Hi !

I know, thank you !

I'm having a weird problem now - Using outputs to turn the grow lights on/off (12volts) - because the mini only has 1 relay - and it's working, but after 10s of the output is on, the relay starts working.. WTF ???

I have the water pump connected to the relay and the lights to the output.. Very weird... Need to dig a bit more..

RE: Pimoroni Automation HAT mini

amgalbu — Sat, 07 Nov 2020 15:56:19 GMT

Hello Bruno

About outputs: you are right. Also consider that sink outputs can handle up to 500 mA whereas the relay can handle 2A

Bye

RE: Pimoroni Automation HAT mini

e14phil — Fri, 06 Nov 2020 17:43:27 GMT

Tanyas work is always awesome, thanks for sharing!

Is it necessary to publish the blogs in Design Challenge>1meterof Pi Space for sponsored challengers?

surbhika — Sat, 17 Oct 2020 15:45:04 GMT

Hi [mention:687981bbb0f34d3584b51cfca4f9c5fe:e9ed411860ed4f2ba0265705b8793d05], I have published my first entry of the Blogs in my own Blog Space with tag 1 Meter of Pi . But I see that you have created all the challengers a separate Author Space.

Am I supposed to publish all the blogs there and re-publish the already published one?

RE: Is it necessary to publish the blogs in Design Challenge>1meterof Pi Space for sponsored challengers?

e14phil — Fri, 06 Nov 2020 17:42:30 GMT

Hey,surbhika yes, Please post in 1 Meter of Pi space.

Thank you for helping gam3t3ch

If you have any problems at the end, just message and ill make sure your blogs are counted correctly

thanks

Phil

RE: Official Email?

e14phil — Fri, 06 Nov 2020 17:40:58 GMT

Fantastic! Glad to hear it

RE: Official Email?

dules — Tue, 27 Oct 2020 09:21:54 GMT

I have still not received an email about the kit.

e14phil can you please check?

The kit came in mail today (no customs fees), now I can start building