[FEATURE]: Sensirion SHT4X sensor

[Jexkin]

Is your feature request related to a problem? Please describe.
I tried to set my SHT40 sensor up using the SHT3x settings but it didn't work, so I think something must be added for the SHT40/SHT4X's to work?

Describe the solution you'd like
SHT4x sensor readouts for temperature and humidity.

Additional context
I already have the hardware so I could test everything, just like last time (in case you remember my name).
If it matters somehow: I got the SHT40 sensor Adafruit sells (adafruit.com/product/4885)
Thanks!

[theyosh]

Hmm, I have to look into this. I found a library that could read out this sensor. But that takes some time to implement. Give me a week. I think I know more then.

[Jexkin]

Sure, take all the time you need. I'm out of town so I couldn't test it anyway at the moment. I should be able to once you figure something out! Thanks!

[theyosh]

Hmm, sorry, it is already added :)

But it is only on the 4.x.y.z branch. You can switch to it using the following commands:

• git remote set-branches origin '*'
• git fetch -v
• git checkout 4.x.y.z
• git pull

And then rerun the installer sudo ./install.sh and restart TP4. This should add a SHT4X sensor.

[Jexkin]

I see, I'll do that as soon as I am home again!
Will keep you updated if everything works :)

[Jexkin]

Hey, so I just switched to the 4.x.y.z branch (did all the steps) but now I can't access my admin panel anymore. Already rebooted the Pi4 a few times but still nothing.
I probably am just overlooking something. IP is correct, so I'm unsure what I'm doing wrong.
The switch to 4.x.y.z was flawless.

Edit: I'll just swipe my install completely and do a fresh install as I do have some other stuff on the mSD card that I don't need anymore.

Edit 2: I switched back to the main branch and I can access the admin panel now. So there may be something up with the 4.x.y.z branch? Or I'm doing something wrong.

[theyosh]

Hmm, without any error it is hard to judge. It is the development branch, but I am able to run it. So if you are willing to try once more, and try this: https://theyosh.github.io/TerrariumPI/faq/how-to-debug-terrariumpi/

[theyosh]

Hmm found the issue. Do a git pull and rerun the installer. Then it should all work.

[Jexkin]

Hey, so I tried it once again after the update and I'm still not able to access the admin panel.
It still should be <pi-ip>:8090, right?
Anyway, I ran the debug and this the output:

I'm a bit confused because it still says Starting TerrariumPI 4.2.0, shouldn't it say Starting TerrariumPI 4.x.y.z?

[theyosh]

Sorry, but I made a small mistake in the installer. So try a final git pull and rerun the installer. That should take care.

[Jexkin]

I did git pull but it seems like it didn't update anything?
I just checked out the branch on GitHub and it says that it was last updated 3 hours ago.
Still can't connect to the admin panel and I still get the exact same output when using the debugging tool.

[theyosh]

Hi, I think our lasts messages just crossed. Because this should all be fixed now, and install the correct python libraries.

Could you test once more? git pull and then sudo ./install.sh and restart TP4.

[theyosh]

And can I then ask to look at #210 ?

[Jexkin]

Hi, I'll do it ASAP. Coincidentally I am on a train again.

In regards of the pics, I actually ordered new enclosures and once I am done with them, I'll make sure to post them :) Should be pretty interesting. Though it may take another 2 months because it definitely needs some time to finish. Hope that's alright!

Also I probably will open up another Issue in regards on how to dim fluorescent tubes with a dimmable electrical ballast, which hopefully should be possible in some way. I may just try to dim it with my current IRF3708 module but that may not work.
But that's future stuff!
(Reason behind that is that LEDs usually don't output UVA and I just want to give my reptiles as naturalistic light as possible and there are some fluorsescent tubes that offer such a thing)

[theyosh]

Hmm, regards to dimming, that could be hard. There are multiple questions regarding to dimming, so I would suggest also to look in the closed issues. Not all dimming issues are solved, but at least they all have quite some information and tests that could help.

The IRF3708 should work with the existing RF- dimmer type... I think. Can't test that.

[Jexkin]

I'll do that once I have all the stuff but it'll probably still take a few weeks because money lol.

Also, I honestly don't know if it's just me but I still have problems with 4.x.y.z ...
I do it as you say ->

then i run the installer with sudo ./install.sh, this is what I see once it's done (which looks normal)

but after the reboot I am not able to access the admin panel via TPi-ip:8090 anymore and I honestly don't know why. Any clue?

As soon as I switch back to the main branch and run the installer everything works as usual.

EDIT:
I installed 4.x.y.z again but I did not reboot this time, I restarted TPI via the admin panel but once I did that I was not able to access it anymore. Then I ran the debugging tool and uhm. Somehow it's running a webserver at 0.0.0.0:8090 instead of my regular Pi-IP?

Also it still says Starting TerrariumPI 4.2.0 . . . and I don't know if that's normal or not.

[theyosh]

This is my fault. Made a typo in the requirements.txt file. So I would like to ask once more to do :

• git pull
• sudo ./install.sh

And then it should be working again. And this is on the 4.x.y.z branch

[Jexkin]

Works now, thanks!
Just as some sort of proof:

Thank you very much! Will the SHT4x be added to TPi 4.3 / main branch? Or should I just stay on the 4.x.y.z branch?
In regards of the fluorescent lights and dimming, I'll probably going to open a new issue IF I run into issues. If not, then I'll hopefully remember to send some neat pictures in the pinned issue #210.

[Jexkin]

Also I just looked at issue #643
I see that you added a Dimmer max dim value and it's at max 100.
Would it theoretically possible to increase it to 1024, as the IRF520 module has a value range between 0 and 1024?
Or am I missing some knowledge? And sorry if I should have posted it in the issue.

[theyosh]

You should be able to enter 1024 in the 'Dimmer max dim value'. When you enter a value higher then 0 then the old dimming code will activate. Else I use a new way of dimming. But it seems that the new way does not always work well.

So you should just be able to enter the 1024 to get the dimmer working the 'old' way. This is a new feature and is not yet documented

[Jexkin]

So, I just tested it and if I put it above 100 the lights are just on at whatever the value in Max power in % is set

If I put the Dimmer max dim value to something in between 0 and 100, the dimming works just as usual.
Also I was more so referring to this

_DIMMER_MAXDIM = 100, that's why I assumed that the max is 100.

[theyosh]

Which GPIO pin are you using? Because with the 'legacy' mode, you can only use GPIO pins which have hardware PWM: https://pinout.xyz/pinout/pwm#

The new dimming method, is software based, where the legacy is hardware based. So for legacy only the following GPIO pins are valid: 12, 32, 33, 35 where I saw that 12 and 32 are shared as 33 and 35 are shared. I did not fully investigate, as I do not have enough dimmers and devices to test with.

[Jexkin]

I tested it with pin 33, I hope the settings should be alright. Should be equivalent as if I'd put the May power in % to 60. And so far it works the same.

but as soon as I put a value above 100 into the Dimmer max dim value, it doesn't dim at all.

[theyosh]

Hi, I made a small change, so do a git pull and then it should work with the value of 1024. But I do not get the feeling that it will not fix your issue.

In the name you have LED. Which suggests that you have a LED device. And dimming LED devices is hard. I test with normal light bulbs. Which dim much more easier.

So, if you are trying to dim a led, I would like to ask to google a bit more about the LED device and dimming. For example: #645

And I would like to close this issue, as the new sensor is working... You can also use #643 for updates.

[Jexkin]

Sure, I'll post updated in the mentioned issue!
Thanks a lot!