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First project advice for hardware: Temperature, humidity and wifi


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#1 donkraft

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Posted 30 December 2014 - 09:23 AM

After many years of lurking (and some drooling), I think it is about time that I get my hands dirty with something simple and actually useful in this space. But I can see that so much has happened since I was last looking into this a few years ago, and it seems picking the right hardware is a bit of a jungle, so I really would appreciate some help with that to get the first project off the ground.

 

My first project will be a simple logger of temperature and humidity. Something along the lines of:

- Every 10 minutes, read temperature and humidity

- Send it to a URL I config (http://heat.mydomain...=35&humidity=61)

 

Version 1: 

- Ethernet and battery (I understand this is the simplest (or at least used to be))

 

Version 2:

- Wifi and battery

 

Version 3: 

- Wifi and outlet power (230v)

 

Requirements: 

- .Net code

- 100$/ budget

 

Priorities:

1. I want to get an easy win under my belt with as little hassle as possible.

2. Cost is less important, I don't want to save money and have to spend more time fiddling with drivers etc

 

The question: 

Which specific devices should I buy to achieve this in the easiest way possible? 



#2 ShVerni

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Posted 03 January 2015 - 03:59 AM

Hello and welcome!

 

If you want to get accurate, and easy, temperature and humidity readings I recommend HIH6130. It's not the cheapest out there, but it easy and quick to get up and running:

 

http://forums.netdui...er-hih6130-i2c/

 

You could also try the cheaper HTU1D, but I have no experience with that, so I can't tell you how it would work, but it looks simple enough.

 

http://forums.netdui...umidity-sensor/

 

Good luck!



#3 donkraft

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Posted 03 January 2015 - 08:53 PM

Thanks for the feedback!

 

I had to order what I could find in coolcomponents.co.uk, as I did not want to ship from many places, and it was more practical to order from inside EU..

 

I picked the NetDuino Plus 2 Starter Kit, some extra small stuff and I then picked a cheaper temparature sensor to begin with -the TMP012. Then I can add the much more expensive HIH6130 if I need the extra precision later. :)



#4 donkraft

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Posted 03 January 2015 - 09:46 PM

This is the stuff I ordered:

 

Digital Temperature Sensor Breakout - TMP102 478 1 4.84 Breadboard Deluxe 720 1 5.29 NetDuino Plus 2 Starter Kit 764 1 68.71 Netduino Plus 2 .NET / C# Development Board       1 x Netduino Plus 2 .NET / C# Development Board 0.00 1074     Breadboard Mini (Blue)       2 x Breadboard Mini (Linkable, Blue) 0.00 1187     Jumper Wires - Female to Female       1 x Jumper Wires - Female to Female 0.00 199     Jumper Wires - Male to Male       1 x Jumper Wires - Male to Male 0.00 175     Piezo Buzzer       1 x Piezo Buzzer 0.00 341     Tilt Switch - 15 degrees       2 x Tilt Switch - 15 degrees 0.00 340     Component Box 6B       1 x Component Box 6B 0.00 668     USB A to micro B Cable       1 x USB A to micro B Cable 0.00 625     LED - Red 3mm       2 x LED - Red 3mm 0.00 213     LED - Yellow 3mm       2 x LED - Yellow 3mm 0.00 215     LED - Green 3mm       2 x LED - Green 3mm 0.00 214     Transistor NPN BC547B       2 x Transistor NPN BC547B 0.00 327     Switch - Mini Tactile PCB       2 x Switch - Mini Tactile PCB 0.00 202     Resistor 220K 0.25W       5 x Resistor 220K 0.25W 0.00 338     Resistor 220R 0.25W       5 x Resistor 220R 0.25W 0.00 336     Resistor 10K 0.25W       5 x Resistor 10K 0.25W 0.00 339     Diode 1N4001       2 x Diode 1N4001 0.00 343     Opto Isolator 4N35       2 x Opto Isolator 4N35 0.00 342     Hitec Servo Motor HS-422 235 1 15.26 Alligator Test Leads - Multicolored 10 Pack 1347 1 2.34 Getting Started with Netduino 960 1 12.91

 

Is there anything else I need to get started? Do I need a soldering iron for example?

 

Edit: Formatting fucked, sorry :(



#5 ShVerni

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Posted 04 January 2015 - 04:10 AM

I don't know much about that sensor, but that looks good. You won't need a soldering iron to do breadboard work, but if you want to make something more permanent, they're indispensable. The only thing is, you'll need a good amount of jumper wires (upwards of a dozen at least), so as long as you have that it looks like you're off to a great start. Please do keep us informed of how things go!

 

Best of luck!



#6 donkraft

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Posted 05 January 2015 - 09:37 AM

Thanks! :)

 

The stuff is backordered with Coolcomponents.co.uk, so I have time to add a few extra things.

 

Starting from completely blank slate and knowing less than nothing about this whole area, so I am sure this is a stupid question, but here goes:

 

Would The jumper cables you talk about, would that be something like these:

 

Male to Male Jumper Wire Variety Pack

jumper2500.jpg

 

 

https://www.coolcomp...riety-pack.html

 

Do I need some female ones as well?



#7 Spiked

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Posted 05 January 2015 - 05:10 PM

Yes.  If you think you are going to stick with it, invest in good crimpers, and get some female ends, and just make a few as you need them.

 

The thing is, from a practical point of view, you can make a female male by adding a pin, not so much the other way around. But a male will have a more solid connection, so I dont know if I would get all females.  I ended up with a bunch of both.  Last project needed male to female :|



#8 ShVerni

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Posted 05 January 2015 - 10:35 PM

Agreed. I have a large supply of every possible type of jumper, and the all come in handy. Still, for just starting out, the male-male will be most useful if everything is being done on a breadboard, but it never hurts to have more jumpers!






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