Let's Control It

localhorst

localhorst wrote: ↑06 Feb 2024, 15:21 So today is the day and ESPEasy took over the control of switching my ventilation.

Uh, the one year anniversary has passed by.
Still working like a charm - can't even remember if I've restarted it in the meantime.

localhorst

Definitely! And as soon as you jumped in, it was a little Apple marketing like: „it just works”. 😉 Thanks again to everyone involved! Well, now I could think about a PCB to make it nice and neat. 🤔 No idea if more people would be interested, but maybe wrap it up this way as a DIY standard air qualit...

localhorst

So I think this is it for the moment for a wrap-up and the "B" unit (right) will go to my wife's office next week: IMG_3256.jpeg I've added some explanation for her and her colleagues on the screen. The left unit will stay home and acts as a dashboard. Hardware / sensor wise it only contai...

localhorst

Thank you bidrohini!
But as you can see on the pictures the units are already build and working with the SEN55.
And so far everything seems to work pretty fine (Thanks to Ton / Ath)

localhorst

After fresh calibration of the S8, it nearly perfectly matches the SCD30 (calibrated 3 months ago?):

: IMG_3234.jpeg (2.52 MiB) Viewed 17626 times

But from experience, it will start to get away pretty soon.

localhorst

Ah, ok, I’ve never changed the ABC period.

localhorst

Only thing making me currently suspicious: the NOx value is jumping over 3000 at startup, ok, but after "calming down" it never changes and stays all the time at 1 - on both devices. Would be great if our air is that clean, but maybe there could be a malfunction. I'll monitor this. Ah, th...

localhorst

What kind environment are you using them that keeps on having such a high base level of CO2? I've used them in our apartment for controlling our ventilation system (now replaced with SCD30, who are doing a perfect job and proving the problem with the S8s). After renovating, the new windows are real...

localhorst

About the SenseAir S8... I'm really surprised to see it is actually outputting such values. I'm not surprised at all - as this perfectly matches my experience with the S8 over two years with 4 units running on S8. This is why I changed to SCD30 dual channel sensors. It's the autocalibration running...

localhorst

Hi Ton, I've changed it to a dummy device for the PM values, just like you advised, thank you! And the second unit is set, up and running with the SEN55 too. The "B" unit is currently on the balcony (and the S8 needs to calibrate itself - again): Bildschirmfoto 2024-04-22 um 12.00.05.png T...

localhorst

First quick feedback before further testing: Flashed back the second device from another system to this build - config.dat is doing a great job. Implemented and connected the SEN55 - looks like it's working straight away: Bildschirmfoto 2024-04-21 um 19.37.03.png Temperature seems to be off by aroun...

localhorst

Well, currently I guess it's more the question if this project can be considered as dead, before thinking about a PCB.

localhorst

Could you provide me with an project description. Maybe even as an extra topic. I think this could be also interesting for other people. I am especially interested in how you did the graphics with espeasy. :) Here we go: WT32-SC01 ESPEasy Dashboard 320x480px I'll be interested in the 3D designs too...

localhorst

Here comes the documentation, how I've created the dashboard on WT32-SC01 with the 320x480px LCD in ESPEasy with BMPs and rules: IMG_3051.jpeg Coming from this thread / project: Air Quality unit - which devices are best? The dashboard is build with a background image ( himmel.bmp - a simple sky pict...

localhorst

You can buy pinheaders with 2 mm spacing. But wiring them to loose wires is a very good receipt for hard to find issues due to loose solderings. Sounds like well experienced to me. :lol: But at least for the testing phase, I guess I have to go this way, thank you! I think it is by far the easiest w...

localhorst

No need for a manual in creating graphics (i grew up with photoshop). At least not for me. I am more interested in the process how to get everything in rules aligned. But no rush... finish you project first.. I'll write it down anyways - maybe it is from interest for other people to create their ow...

localhorst

I'll be interested in the 3D designs too (I do have 3 3D printers here, so no need to ship any prints to me) Of course, just let me do a final check with the SEN55 fan running and the noise - if there is any (hopefully not). Then I'll publish them to printables. And I'll write a manual for the ESPE...

localhorst

It looks really nice. Could you provide me with an project description. Maybe even as an extra topic. I think this could be also interesting for other people. I am especially interested in how you did the graphics with espeasy. Thank you! Yes, of course I can do it. If it is from interest and neede...

localhorst

One question regarding the Expansion board interface, 2.0mm pitch, 2X20Pin of the WT32-SC01: How do you work with this? Are there any connectors / plugs where the cables can be soldered on (haven't found any)? Or do you just stick male DuPont in there? What is a clean / proper way to connect the sen...

localhorst

Right now we can't use font files, so it has to be embedded in the binary. A first step would be to allow to use fonts from the file system and of course a manual/tool to simply create them and test them to see no parts (thin lines or thin openings) are missing. That sounds awesome to me! I think a...

localhorst

Fonts are a bit tricky for lots of reasons. Maybe it is even better if we document how to make fonts yourself and embed those. That sounds like a nice solution. Although I currently have no idea how hard it would be to create those. But would be nice to upload a font file and just use it, yes. One ...

localhorst

Maybe set the priority first in adding more fonts (or less different fonts, bur more font sizes per font). Scaling of fonts doesn't look nice and getting pixely on the TFT.
And that those fonts are able to show characters like e.g ° and m³. Because now I'll have to create a BMP for it.

localhorst

Didn't know ESPEasy was capable of generating such nice dashboards. Or have you been really creative with BMPs? Well... Bildschirmfoto 2024-02-25 um 11.38.22.png The background image " himmel.bmp " (full screen resolution 320x480px and really big for the unit) needs some time to load, so ...

localhorst

I guess the housing is ready, now only data from the SEN55 is missing.

: IMG_3019.jpeg (2.28 MiB) Viewed 31718 times

: IMG_3020.jpeg (2.12 MiB) Viewed 31718 times

localhorst

@bidrohini:
Thank you, but the die has been cast already. It's the sensor package of SEN55 and SenseAir S8 for (NDIR) CO2 measurement.
I'm currently printing the 3rd design iteration for the housing.

localhorst

Ah, I’ve edited the post before.
But here is a macro shot of this what seems to be a sensor:

localhorst

Take a look what just arrived.

: IMG_2977.jpeg (2.1 MiB) Viewed 32026 times

So the hardware is complete.

*edit*
The little cutout in the middle on the left:
is it a light sensor or something? Which needs free visibility in the housing design?

localhorst

Two SEN55 in da house - ready to rumble, eh... test! I've ordered 2 WT32-SC01 with 16MB - better I'm patient and get the right stuff. Meanwhile they are on the way - already waiting for outbound release of China. I don't know, maybe they'll arrive way before end of March. Those are already announced...

localhorst

Already some wrap-up for this project, the unit is running fine since a couple of days and will be integrated in my automation next week So today is the day and ESPEasy took over the control of switching my ventilation. Not even a month later, since I started this thread. Thank you all so much agai...

localhorst

So I still strongly advice to read the docs for PMSx003 as it has a lot of info about reading dust particles in general, which probably will fully apply to this SENS55 sensor. Very interesting indeed! As well the linked video. but I really doubt they actually measure particles over 2.5 micron. None...

localhorst

From the sensor side, I would recommend SCD40/41 for CO2, temperature and humidity, they are almost as precise as SensAir while cheaper, more compact, and less power hungry. Actually, there's no overlap between SEN55 and SenseAir S8 as S8 is basically CO2-only sensor Yes, this is why I'll add the S...

localhorst

Thank you Ton! Then I’ll proceed with a portrait mode design for it. Already the USB connection for the board would make it very / unnecessary wide, if in landscape mode. Wouldn’t look nice in the end. As well the (beefy) SEN55 is nearly the same width in portrait, so right on. The S8 will be above ...

localhorst

The touch plugin ( P123 ) supports touch-areas, buttons, sliders, and an optional menu-like structure for the buttons. (Documentation I still have to write...) Quick question Ton: Are there any problems with this plugin expected, if I turn the display by 90 degrees? I came to the point, that I thin...

localhorst

Regarding the SEN55: The documentation is giving a real good impression already, relativizing the high price a bit and is giving a good quality impression. 3D model available and especially the Mechanical Design and Assembly Guidelines for SEN5x is really helpful, to make the design decisions for th...

localhorst

Just a quick update:
I've ordered 2 WT32-SC01 with 16MB - better I'm patient and get the right stuff.
As well I've ordered 2 SEN55 including cables.
Now waiting for the hardware, starting with the design for the housing at some point.

localhorst

Already some wrap-up for this project, the unit is running fine since a couple of days and will be integrated in my automation next week: If someone wants to build the same unit: The original enclosure from Baptist (printed in green on the pictures) My adapter plate for 2x DAC + step-down module (pr...

localhorst

P123 - wow, that sounds very cool!

Well, then I have to find a quicker delivery for the boards for a reasonable price, or simply have to wait until end of March (which would be hard).

localhorst

As always, measuring is knowing, only if you know what you're measuring. Absolutely true! Easy with CO2, but for other gases, I have currently no idea. With that expression in mind, you may want to reconsider measuring NO2, O3 and SO2 as it can be quite hard to make proper measurements on those. I ...

localhorst

Edit: Changed link to 16MB model Great, thank you! On AliExpress I cannot find a WT32-SC01 without Plus and with 16MB - annoying. On Alibaba, from your link, it would be end of March, when the units would arrive. AliExpress is getting it here usually within 2 weeks. Well, if there is no alternative...

localhorst

Would a WT32 SC01 as a combined unit of TFT and ESP32-S3 with 16MB flash maybe a good idea?

localhorst

For starters, I'd suggest to use a TFT Color display (either the ILI9341 (try to avoid the ILI948x models...) or ST77xx models will do) over the LCD2004, as TFTs can show much more than a couple lines of text only. And also, an ESP32 if preferable over an ESP8266, as the ESP8266 builds do not suppo...

localhorst

Hi everyone, after successfully changing my CO2 measurement units from SenseAir S8 to SCD30 (who are working great!) and my unit with the DACs - thank you all so much for your great support! - , my wife is having a request to me. She likes to have an air quality unit for her office. Her office is in...

localhorst

TD-er wrote: ↑01 Feb 2024, 11:56 Hmm I find it strange that there is no mention of the max current on the outputs.

Yes, this is indeed weird.

TD-er wrote: ↑01 Feb 2024, 11:56This board does indeed have the 10uF & TVS present.
See schematic: https://dfimg.dfrobot.com/nobody/wiki/a ... 8e8c79.pdf

Great, thank you, this is good to know!

localhorst

Thank you Ton! Of course, I don't plug 5V on the 3.3V pin. Since I changed to 3.3V, the unit is running fine. I keep it running with my test script over the weekend. If everything is fine / no crash occurs, I'll build it into my server cabinet / ventilation automation next week. But as I'm measuring...

localhorst

TD-er wrote: ↑31 Jan 2024, 11:32 Consider it a miracle the board did survive higher voltages.
So maybe also go outside and buy a lottery ticket

Luck with the board, no luck with the lottery. But I’m fine with it.

localhorst

Thank you!

localhorst wrote: ↑31 Jan 2024, 09:46Do I need some gentle, fishy slaps again?

There we are...

localhorst

Thank you again! So, from what I understand, it's in general not a good idea to power the ESP32 and the I2C devices with 5V. So I'll leave the whole unit now running on 3.3V with ioBroker switching the output every minute. Switching with 2 sec offset each channel to a random voltage 0-10V. Let's see...

localhorst

but when running the DAC board at 5V, then the I2C bus should use a level converter, as the ESP only accepts 3.3V on the GPIO pins Might this be a reason for my crashes? All, the board as the DACs, are getting 5V currently. Do I need some gentle, fishy slaps again? :? I'll change to 3.3V now, disab...

localhorst

For "stress testing" the unit, I've made a script in ioBroker yesterday. It switches the output voltage of each DAC channel every minute to a random value 0-10V. This morning the unit was dead again. Not reachable, the both LED of the LAN not flickering as normal, only periodically blinkin...

localhorst

Ath wrote: ↑30 Jan 2024, 23:28 I've added documentation, can you please proof-read, and give feedback on this?

Looking good to me!

This is the only thing, what maybe could be added:

Output - GP8403 Dual channel DAC 0-10V — ESP Easy 2.1-beta1 documentation.pdf wrote:and works from a single 3.3V power source

3.3V or 5V

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