METEOROLOGICAL STATION PROJECT

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Functional prototype:
This work is the development and implementation of a functional prototype chosen work. The final paper should include an LED to flash at a frequency of 1 Hz The
group can choose the microcontroller or FPGA you want to use, as well as the programming language. It is mandatory to drawing(s) card(s) PCB, however, is not
binding its physical implementation.

We intend to develop a meteorological station , consisting of a control temperature, humidity, direction, wind speed, etc. These values are "‹"‹displayed in a display screen. The system may allow to register
values "‹"‹to a database and make them available via the Internet.

Where i can the find the hardware of a METEOROLOGICAL STATION to implement on my circuit ?
I want to buy one online (for cheap), what sites are recommended ?

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Last Edited: Sat. Apr 12, 2014 - 09:02 AM
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Not only can you not spell ' with', you can't seem to Google. I have no idea of what your circuit setup is - what is the photo meant to tell us?

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Well, many things make me puzzled:
a) which accuracy do you want (10C for temperature, or 0.1 C?)?

b) do you want to make a thread for all channels together (from your pesting histery, that would lead to >1000 answers, leading to utter confusion and huge mental disorders)? Or will you choose a sensor, try to have it workiing and ask for help on a narrow field?

c) usually, meteorological values are time stamped: you seem to have forgotten a way to keep trace of time -unless it is always connected tto a PC or -incl- to the Nain Ternet.

d) is it meant to be mobile or fixed?
If it is mobile, how will you compute the wind direction? (magnetic fields, far from pieces of iron? wild guesses? lottery?)

e) is it a school work, or a hobbyist project./challenge?

BTW for cheap T and HU measurements, did you ask google about DHT11 (1 % RH, 1C accuracy)?

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Circuit Cellar magazine has an ad in the back every month for a cup anemometer and a wind direction vane.

Imagecraft compiler user

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Here's one site: http://weatherwiseinstruments.co...

I'm not sure it is the cheapest, but I do not think you can get anything that is substantially cheaper than that, e.g. about $20 per "probe".

As a matter of fact, I happen to have bought a complete kit looking as if it consists of exactly those parts. I do not recall the exact cost for the kit, but it might be just as cheap to buy a complete kit with anemometer, wind direction meter, rain gauge and thermo/hygro-meter. In the specific parts I link to here the thermo/hygro-meter is in the transmitter unit though - a decent standalone t/h-meter should be somewhere between $5 and $15 in single units.

So, I think you're looking at something like $80 for the probes.

Since you post here you obviously have a connection to the web. I'll leave the googling for cheaper parts to you.

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"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington] "Words represent concepts. Use the wrong words, communicate the wrong concept." [J Morin] "Persistence only goes so far if you set yourself up for failure." [Kartman]

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rui222 wrote:
This work is the development and implementation of a functional prototype chosen work...

Sounds very much like a school assignment: you have been given the task to develop and implement - so why are you intending to just go out and buy it :?:

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(student assignment description), then student says

rui222 wrote:

Where i can the find the hardware of a METEOROLOGICAL STATION to implement on my circuit ?
I want to buy one online (for cheap), what sites are recommended ?

Pathetic. Wish the Prof's email address was known here.
As you requested, here are some sites
http://www.slate.com/articles/li...
http://www.hcii.cmu.edu/cheating...

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I read the OP as he is looking for the "probes", but will do the interfacing and data handling himself on an AVR. Not unreasonable.

As of January 15, 2018, Site fix-up work has begun! Now do your part and report any bugs or deficiencies here

No guarantees, but if we don't report problems they won't get much of  a chance to be fixed! Details/discussions at link given just above.

 

"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington] "Words represent concepts. Use the wrong words, communicate the wrong concept." [J Morin] "Persistence only goes so far if you set yourself up for failure." [Kartman]

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Any project needs requirements and specs. So far I think the requirements are: an avr web server weather station. Should serve up the temperature, wind speed, direction, relative humidity. Specs: mega1280, xport Ethernet for web connection, lm35 to a/d for temperature, xx for windspeed to avr inputs, yy for wind direction to avr inputs, zz for relative humidity to avr inputs. Anyone have a suggestion for xx yy zz?

Imagecraft compiler user

Last Edited: Sat. Apr 12, 2014 - 11:47 PM
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I'd go for a combined temp/humidity unit. No part numbers in head ATM.

For the anemometer, wind direction and precipitation look at the site I linked to. (I had bad luck with the anemometer. The ball bearing was actually corroding to the point where it got stuck. Didn't take much as the forces involved are quite low. It was serviceable though. 5-56 and some very thin oil.)

As of January 15, 2018, Site fix-up work has begun! Now do your part and report any bugs or deficiencies here

No guarantees, but if we don't report problems they won't get much of  a chance to be fixed! Details/discussions at link given just above.

 

"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington] "Words represent concepts. Use the wrong words, communicate the wrong concept." [J Morin] "Persistence only goes so far if you set yourself up for failure." [Kartman]

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Temp and Rel Hum are easy with the Sensirion sensors.

JC

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bobgardner wrote:
Any project needs requirements and specs.

The only actual requirement given in the assignment description is to flash an LED - with a specification that it's to be at 1Hz.

It all really needs some clarification from the OP...

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
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a) preferable 0.1C but if its expensive then i want 1C accuracy.
b) i have a temperature sensor already LM35, also have a fotoresistor(light sensor), sound sensor, buzzer, ultrasonic sensor, missing humidity, anemometer,wind direction meter.
c) Is connected to a pc ?, i got a display led to use, also have to include 1Hz blinking led, to send the values via internet do i use wireless (is cheap)? or ethernet cable i got one.
d) preferable fixed, how easy is to implement one mobile ?(i got stepper motor, servo motor, motor drive module.
Maybe with a fan or randoms values, im opening for sugestions.
e) school work
f) 1-2€ DHT11 10HR, 2C accuracy OR 3-6€ DHT22 have 5 HR, and 0,5C accuracy.

My pack i brought is in this site http://www.ebay.com/itm/Starter-...
So i can use all stuff on this pack (image, what is recommended to implement on this project?), anyone have more ideas to use on this project ?
Can i use tilt switch sensor module, ultrasonic ranging module, touch pad module, RFID module, servo motor, stepper motor, IR controler, motor drive module,etc on this project?

To control lighting fotoresistor or relay module ?

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I guess you could use the tilt switch module to make a "tipping bucket rain gauge". But I suspect that it will be beyond your skill set.

Also beyond your skill set would be making a "without any moving parts", fully functional anemometer, wind direction and sensor-less air temperature sensor by using 4 ultrasonic modules and a relative humidity sensor. That alone should get you an A++ mark. :lol:

Ross McKenzie, Melbourne Australia

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Quote:
to send the values via internet

Given a data sheet for the various sensors, a micro, and some time and effort you should be able to interface the sensors to the micro and read their values.

If you get stuck you can post your specific questions here and get a lot of guidance.

I view putting the data on the internet to be significantly more challenging than reading the sensors. I don't view that part of the project as simple.

JC

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rui222 wrote:
to send the values via internet do i use wireless (is cheap)? or ethernet cable

It's your project - that's up to you!

If you're not sure what is appropriate, you should be discussing this with your teachers/tutors; only they know what is appropriate to the assignment you have been set!

Wireless is inherently more "difficult" than wired - so I would suggest that you start wired

Quote:
preferable fixed, how easy is to implement one mobile ?

Again, it's your project - so you need to think about the issues of making it mobile

For one thing, clearly (I hope?), a wired internet connection becomes impractical - doesn't it?

Quote:
(i got stepper motor, servo motor, motor drive module.

Are you thinking of making it self-propelled? I don't think that's what was meant by "mobile"..

Again, you need to discuss with your tutors what's appropriate to this particular assignment

Quote:
what is recommended to implement on this project?

You have the project specification; we don't. Any queries about the specification should be directed to your tutors.

Quote:
Can i use tilt switch sensor module, ultrasonic ranging module, touch pad module, RFID module, servo motor, stepper motor, IR controler, motor drive module,etc on this project?

Again, it's your project - can you think of any value that could be added to your project by using them?

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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Quote:
d) preferable fixed, how easy is to implement one mobile ?(i got stepper motor, servo motor, motor drive module.

Well, when I asked about "being fixxed" I was wondering whther your station would be _always_ at the same place (finding the North-South axis is rather easy: either one already knows it, or, in sunny days -at least outside tropics and poles- , at 12 local, it is trivial) or will be moved from time to time (then, NS direction may become random, if there are no magnetometer extra - sensors)

Quote:
a) preferable 0.1C but if its expensive then i want 1C accuracy.
b) i have a temperature sensor already LM35

Well a LM35 has a 10mV/C sensitivity; if you want your ADC to have a 0.1C resulution, it should have a quantization of 1 mV : the highest resolution you can get with the internal avr ADC is 5/1024 = 5 mv -you lack 2/3 bits). I forgot about noise sensitivity, which makes things even worse... -> a combined T and RH sensor would be equivalent...

Quote:
e) school work


Schools can be kind, even with cut and pasted code if it is well commented and acknoledge (schools are meant for learning, not for doing original things: if code is better commented than the original -or translated-, one may hope it has been understood and studied...)
BTW: I do not know whatis yourposition w/r Arduino (or arduino code, which can be ported to pure C(++) : often, sensors come with Arduino code at Laduada or Sparkfun) but I asked google about "arduino anemometer" and found a very similar to your project (had an extra barometer) : price was 200 $ (consistent withg J Ekdahl estimate for sensors), the author develeoped first under Arduino UNO, then, for ressource greediness, he chose Arduino Mega :
http://www.toptal.com/c/how-i-ma...

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Quote:

Can i use tilt switch sensor module, ultrasonic ranging module, touch pad module, RFID module, servo motor, stepper motor, IR controler, motor drive module,etc on this project?

Remind me again but weren't you the person who's just spent 12 pages getting an LED to flash? Don't you think this project may just be a tad beyond your current skillset?

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Well, I estimated it might be a 60 pages project (unless OP cuts it in small pieces, uses already circular wheels -if he understands them or asks what he should understand, will it harm?- )...

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clawson wrote:
Don't you think this project may just be a tad beyond your current skillset?

Yes - that was my impression when suggesting wired rather than wireless.

But, again, this is the kind of thing that Tutors/Teachers are best placed to advise on - they know the student, the course, and the expectations/requirements of the particular assignment.

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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Yes... and Rui may not be the sharpest in his class.

Ross McKenzie, Melbourne Australia

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Analog and Microprocessor System Design
The Weather Station Project

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Thank you zauberer, that is a very interesting paper.

Smiley