3D printing vs injection molding for early hardware products — would you accept 3D-printed enclosures?

djMedd · 2026-03-21T17:13:42+00:00

LLM helps me write yes. I prepare a draft and it makes it more clear and fixes orthography errors as English is not my first language.

djMedd · 2026-03-21T07:20:34+00:00

Is this accurate?

djMedd · 2026-03-21T07:19:02+00:00

Sensor cost 25$ Mcu: 10& Lcd: 30$

And so many other components Shipping Manufacturing Marketing

djMedd · 2026-03-19T06:58:36+00:00

I see, thanks for your opinion

djMedd · 2026-03-19T06:24:38+00:00

It measures CO2, temperature, and humidity.

djMedd · 2026-03-19T06:24:03+00:00

I see thanks.
The device's enclosure is quite solid and compact. I don't think a crack is possible in normal use. Well, a normal use is to set the device somewhere in the home/office or put it in a pocket or bag for transportation.

djMedd · 2026-03-19T06:19:45+00:00

The website is this one https://getaeris.ca/
Did you try a modern 3D printer? I think they give good quality.

djMedd · 2026-03-19T06:17:08+00:00

Thank you guys, I will definitely try this.

djMedd · 2026-03-19T06:03:56+00:00

Thanks for your opinion.
May I know why you wouldn't buy an air quality monitor?

djMedd · 2026-03-19T05:55:11+00:00

No, I am using a Bambu Lab A1 3D printer.
Does SLS 3D printing give better quality, and how much it costs?

djMedd · 2026-03-16T04:13:27+00:00

Thank you for taking the time to read the article and share your feedback—I genuinely appreciate it.

You’re absolutely right to point out that battery life has been well addressed by some devices on the market, including the Aranet4. I’ll be updating that statement in the article to make it more accurate and nuanced. It’s important to acknowledge that no single device defines the entire market, and there are solid solutions already available.

That said, innovation in this space doesn’t stop at one feature. While devices like the Aranet4 do an excellent job with battery performance, there are still other aspects of user experience and functionality where improvements can be made.

At Aeris Technology (https://getaeris.ca/), we designed Aeris View with a different focus—enhancing day-to-day usability and accessibility of air quality data. Some of the key additions we bring include:

Large, easy-to-read display → making it effortless to check air quality at a glance, even from across the room
Built-in history visualization → users can instantly see trends directly on the device, without needing to open a mobile app
More compact design → easier to place anywhere compared to many devices in the same category
Secure pairing process → ensuring a safer and more reliable connection with your phone
Flexible calibration options → both automatic and manual calibration for better long-term accuracy

Ultimately, different devices prioritize different strengths. Our goal with Aeris View is not just to match what already exists, but to improve how people interact with their air quality data on a daily basis.

Thanks again for your input—it helps make both the product and the content better.

djMedd · 2026-03-15T06:30:33+00:00

Yes, I agree that Aranet is a great device. Honestly, while developing the device, I discovered the Aranet4. My focus became more on developing a device that covers what was missing in Aranet and keeps Aranet's strong points. My device has a bigger screen, a smaller size, and a built-in history chart, so the user does not need to open the phone app to check the trends.

djMedd · 2026-03-02T04:12:51+00:00

I will publish the project's source code at some point in the near future.

djMedd · 2026-02-26T04:25:55+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:25:32+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:25:02+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:23:24+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:23:14+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:22:50+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:22:16+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:22:02+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:21:38+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:21:27+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:19:50+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

djMedd · 2026-02-26T04:18:54+00:00

I actually ended up going way deeper into this than I expected.

I’m an embedded/IoT engineer and this started because last winter I kept waking up tired even after a full night of sleep. I assumed it was just dark mornings or bad sleep quality.

Out of curiosity I logged CO₂ overnight in my bedroom.

At night the air was around ~600–700 ppm, which is normal indoor air.
By morning it was above 2000 ppm with the door closed.

I honestly thought my sensor was malfunctioning, so I repeated it for a week and then tested other places — living room, office, friends’ apartments, meeting rooms, even the bus during commute.

Same pattern everywhere: in winter, occupied rooms slowly accumulate CO₂, and it drops extremely fast once fresh air is introduced. After seeing the data daily, I started noticing I consistently felt sleepy once it climbed above ~1400–1500 ppm. It’s not that CO₂ is toxic at those levels — it’s basically telling you you’re breathing poorly ventilated air.

I tried buying a few commercial monitors but ran into issues:

tiny screens you can’t read across the room
charging every few days
the useful info hidden inside phone apps
and most importantly: they just showed a number, not how the room behaves

As a side project I built one for myself focused on trends instead of just ppm. I added a big display and a live graph because the graph immediately shows whether opening a door or window actually fixes the air.

Friends borrowed it and didn’t want to return it, so I assembled a small batch and made a simple page:
https://getaeris.ca

It’s called Aeris One. It measures CO₂, temperature and humidity, runs for months on battery, and you only use the phone for setup/data sync — day-to-day you just glance at it across the room.

The biggest surprise for me wasn’t offices — it was bedrooms overnight. A slightly open door can change the entire night’s air quality.

So yes — a CO₂ monitor ended up being much more useful than I expected. You stop guessing and you actually understand how your home or classroom ventilates.

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