💬 EFEKTA Temperature & Humidity mini sensor

[openhardware.io]

https://www.openhardware.io/view/589/EFEKTA-Temperature-and-Humidity-mini-sensor

[scalz]

Hi.

looks cute board. But for better message delivery reliability and range, you could improve antenna placement (for better rf radiation there should not be any routes, metal etc under antenna) + more gnd plane, else you'll get shorter range than you should expect.

[berkseo]

@openhardware-io
Maybe, but no problem noticed, this device is powered by battery, not by pulse power supply. There's no PWM, no induction. Work perfectly. There are no lines behind the transmitting antenna

[scalz]

@berkseo
my comments were not about pulse power, but about rf radiation, gnd counterpoise size regarding monopole (on batt, less gnd = less range & possible freq detuning), meandered antenna prone to detuning.. (and on pic looks like you have a route behind it).
In some usecase (more range needed, or when board is enclosed etc), these details, combined, could create retransmission for example and more power used etc.
Well, I bet you could get better range if you tested different design vs range. But, no matter, great if it's working well enough for you. That's most important point
Keep the good work!

[berkseo]

@scalz
Partially agree. Ideally, the ground distance from the antenna should be > 30mm. This condition is not feasible :). In my case, as far as possible... Generally a big issue to the most printed antenna. How well these printed antennas are calculated on all these radio modules :)). But this already the twists and turns... However, thanks for the advice, not in my rules to give up reasonable, kind and free advice

[berkseo]

very soon I will start selling, now there is a completion of the design of the housing for the sensor.

[berkseo]

@instrumentsmeco
perhaps it will be more interesting extended version ... coming soon
E-paper Temp&Hum sensor | First prototype test | MySensors

[berkseo]

Added test sketch

[berkseo]

The second revision of the pcb. Added mounting holes for mounting to the device body. Added cutouts for the buttons. Added temperature barrier for temperature and humidity sensor. The lines are moved as far away from the antenna as possible. The empty areas on the Board are filled and connected to the ground.

[berkseo]

Who makes orders. Please specify in the order what battery holders to put. cr2450 or cr2477

[MiKa]

Hi,
exist some enclosures for your sensors?
MiKa

[berkseo]

@mika said in EFEKTA Temperature & Humidity mini sensor:

Hi,
exist some enclosures for your sensors?
MiKa

Hi, this is a problem, for now, I do it, but I practically have no time for it. But I will definitely make them myself. Maybe I will do them on industrial equipment, if some people like my devices, now they are testing them

[jeti]

@berkseo do you have a 3d Model of the Sensor? I could support with designing a housing if you want!

[terxw]

What is the serial upload speed?

[berkseo]

@terxw ...as usual, 115200 (max). And why such question???

[berkseo]

@jeti Sorry, I did not answer. No, I do not have a 3D model. I can send you a device using components. It would be great if there were cases for devices from third-party developers.

[magpern]

Could you upload the schematics or some guide of what component goes where?

[berkseo]

Started the development of the case...

Remember to support the project with your likes !!!

[berkseo]

@berkseo
Update, the hull prototype is ready. Developed at SOLIDWORKS. It was printed on a 3D printer type SLA. Trial printing on opaque resins has been started. This case cannot be reproduced on the printer type FDM.

[berkseo]

@berkseo

[berkseo]

Completed the transfer of 3D models to non-transparent plastics

[Yveaux]

@berkseo what's the function of the 2 buttons?

[berkseo]

@yveaux

One button is reset, the second button is multifunctional. Depends on how many seconds you hold this button. In my program, I use this button to connect via air to other devices and to transfer the device to receive settings (data transmission intervals, led operation and so on). This button is not used in my test sketch

An example of direct connection between devices (without the use of controllers, without changing the SOFTWARE) is my development, which is in the testing stage is the controller of Underfloor heating. This device controls the five contours of the Underfloor heating. Up to 10 such temperature sensors can be connected to this device simply by pressing the connect button. Maximum of two temperature sensors per one relay channel.

MySensors | PCB design modification | EFEKTA CETA | MySensors – 00:25
— Andrew EfektaSB

MySensors | EFEKTA CETA | First HW Test | MySensors – 01:21
— Andrew EfektaSB

MySensors | EFEKTA CETA | SW Test2 – 01:32
— Andrew EfektaSB

Examples of direct connections (micro-networks) based on MySensors can be found here:

Стенд элон мод | Реле, выключатели | MySensors 2 – 01:09
— SMART BOX

Test software - Happy nodes | MySensors | Switch | StandAlone mode | Master - Slaves mode – 03:45
— Andrew EfektaSB

Micro network 2 | MySensors – 01:53
— Andrew EfektaSB

[berkseo]

MySensors | Magnet test – 00:15
— Andrew EfektaSB

[jeremushka]

Is it possible for you to share the sketch as it has been removed from the project presentation because of the rules of the website?

[berkseo]

@jeremushka said in EFEKTA Temperature & Humidity mini sensor:

Is it possible for you to share the sketch as it has been removed from the project presentation because of the rules of the website?

https://www.openhardware.io/view/589#tabs-source

[berkseo]

Finished the enclosure for the sensor on the battery 2477 (1000mA)

MySensors | TEMP & HUM SENSOR | 1000mA | MySensors – 00:59
— Andrew EfektaSB

[berkseo]

To install the sensor on the wall, I recommend 3M adhesive strips (with easy removal)

[berkseo]

Some more photos...

[jeremushka]

@berkseo said in EFEKTA Temperature & Humidity mini sensor:

@jeremushka said in EFEKTA Temperature & Humidity mini sensor:

Is it possible for you to share the sketch as it has been removed from the project presentation because of the rules of the website?

https://www.openhardware.io/view/589#tabs-source

Thank you very much. Great casing, it is very discret. professional design. congratulations

[berkseo]

@jeremushka

Thanks. This is actually my first experience in designing sensor housings. I've never done 3D modeling before. A month and a half ago I started watching a video on YouTube on modeling in SolidWorks. With printing on a 3D printer is also my first experience.

[Joerideman]

How did you produce such a nice result? The text and buttons are very detailed.

Is it SLA printing?

[berkseo]

@joerideman said in EFEKTA Temperature & Humidity mini sensor:

How did you produce such a nice result? The text and buttons are very detailed.
Is it SLA printing?

Yes it is an SLA. One day, watching again another video on YouTube about how people make models of characters on such printers(with high detail), at some point I realized that this technology is very well suited for prototyping cases for miniature devices. It is possible to obtain an almost industrial quality of the final product. ...Then I bought it ...And I did.

These are attempts to repeat the model on the FDM printer(two different people, on two different printers):

[berkseo]

SLA printer:

[berkseo]

It turns out a very interesting surface, like a soft-touch

[Joerideman]

Nice to see the difference.

[jeremushka]

Do you solder the components on the PCB by yourself and you launch the whole process in factory? Because soldering such kind of chip ATMEGA328_QFN32 is not that easy or need a microscope i think.

[berkseo]

@jeremushka said in EFEKTA Temperature & Humidity mini sensor:

Do you solder the components on the PCB by yourself and you launch the whole process in factory? Because soldering such kind of chip ATMEGA328_QFN32 is not that easy or need a microscope i think.

I myself solder pcb. These small 328s are easier and faster to solder than the large 328s. Because you don’t need to solder each contact. Positioning, fixing, heating with a soldering dryer, elimination of excess solder with the help of a soldering iron.

[berkseo]

MySensors | multi sensor | mysensors | nrf52832 | final tests – 01:33
— Andrew EfektaSB

[jeremushka]

Hello Berk,

Do you still have PCB board available for sales for this project or for the upgraded one with NRF5 ?

[berkseo]

@jeremushka said in EFEKTA Temperature & Humidity mini sensor:

Hello Berk,
Do you still have PCB board available for sales for this project or for the upgraded one with NRF5 ?

In about a week, I will post an updated version of this device. The changes will affect the attachment to the case. And it will be available for purchase.

[jeremushka]

@berkseo Thank you for your answer Good continuation on your nice project.