Hi guys. This is my first instructable. I decided to tell you how to connect a humidity and temperature sensor AM2320 to Arduino board.
This sensor is very accurate and sensitive so it's great for high precise measurements. However it's a new sensor and there is almost nothing about it. You must notice that AM2320 is not a DHT series and it requires I2C connection. This is very useful if you are using it for a weather station along with BMP180 which is also I2C.
I tried several libraries with no success until I made it. So if you want to buy an AM2320 here is how to use it with Arduino.
Step 1: What You'll Need
1. Arduino pro mini or compatible board.
2. USB to Serial adapter a.k.a. FTDI (just in case you are using pro mini)
4. Some wires.
5. Arduino IDE
Some other things:
2. Cutting tool or knife.
3. Some basic skills.
Step 2: Soldering the Wires
You'll need to solder some wires to the AM2320 pins because they are very thin to use DuPont connectors directly. However I'm still using DuPont wires but cut in half. Just grab your solder and do it.
Now all you need is to connect everything and use some code of course.
Step 3: Connecting...
Well this is the easiest part. Just grab the wires and connect them until there is no open wire left.
I'm unable to make a circuit design at this moment so I'll describe the connections.
AM(1) -- 5Vcc
AM(2) -- A4
AM(3) -- Gnd
AM(4) -- A5
Step 4: Library and Codding
This is the crucial step. I searched a lot and tested a lot and finally I succeeded to put this sensor to work. I found the library in the comments of a Russian blog post. This is how deep I searched for a proper solution :-)
Here is the link for the library at GitHub: AM2320-master
The code is as an example inside so just download and install the library.
Step 5: Final Tests
As you can see in the screenshot it works. And also you may note that the humidity went more than 99% when I breathed to the sensor.
And that's all. Don't be afraid to test this awesome sensor and share your experience.
I hope you enjoyed my first instructable and sorry for my non-native English :-)