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First project advice for hardware: Temperature, humidity and wifi

Started by donkraft, Dec 30 2014 09:23 AM

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7 replies to this topic

#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?

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#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!

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#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.

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#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

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#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!

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#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

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

Do I need some female ones as well?

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#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 :|

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#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!