Help please

Projects Programming
1

Hello,
I'd need to make a program that would control the (degrees) from two hydroscopes (SparkFun RHT03) and if the humidity of one of them will be higher than the other , the switch will turn turn on for example PIN5. I have no idea what to do. Can anyone help me? Thank you.

2

First of all, brilliant title sir! ::slight_smile: Of course you want help, that's why you're here. But with what?

But what to do, get yourself an Arduino, get to know the basics, Google a bit about the sensor and start making code.

THEN, when you have a error somewhere or you're stuck, come back here and ask some questions including schematics and code :wink:

3

To add to what @septillion has said I suspect that Sparkfun has some example programs for their device.

...R

4

I don't understand what "control the degrees" might mean. I suspect we have a non-native english speaker here.

Yes, flipping a pin based on the readings of two sensors is very do-able. Let's have a look at … yeah. The sample code is pretty nasty. And it's in a word document or some horror - oh, there's a github. Well, that something at least.

It uses a 1-wire protocol, so timing is important. And they have defined their own names for various types instead of using type.h for absolutely no reason whatever that I can see. I'm also reasonably certain that it won't compile: SendData lacks a type specifier. Oh - and the Delay() function has a loop that will get optimised out and so it won't do anything.

Good luck.

5

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html

As has been said before, the site that you got the Humidity sensors has example sketches using your sensor.

Thanks.. Tom... :slight_smile:

6

PaulMurrayCbr:
The sample code is pretty nasty.

Wow, I just lost so much respect for SparkFun. Anyone who is recommending a beginner to try that sample code needs to take a look first: https://github.com/sparkfun/RHT03/blob/master/Firmware/RHT03_Example/RHT03_Example.ino.

There are multiple well written libraries for the DHT22 with easy to understand examples. I don't have one of these sensors but here are a couple of popular ones: