I've been a fan of Arduino for years now, and have used it for building everything from MIDI controllers to simple LED flashers. One thing that has always intrigued me has been visualizing some of the data that I read off of the Arduino Pins.
Plot.ly makes this simple. Really simple.
The purpose of this instructable is to demonstrate how to hook up an Arduino + Ethernet Shield and send data to Plot.ly's Servers and create beautiful graphs. We will be using a dual temperature+humidity sensor (DHT22), and sending the results directly to Plotly.
Step 1: What you will need:
- Arduino (We're using the UNOr3)
- Ethernet Shield
- DHT22 Temperature + Humidity Sensor
- Hookup wires
- Angled pin headers (unless you use female-male hookup wires, then you won't need these)
- 9v Wall Adapter
- Ethernet Cable
(We will explain how to install the libraries in a later step)
- Two pieces of (2 1/2" x 3 1/2" ) wood (1/4" thick)
- Four (10-32x2in) Machine Screws
- 12 Hex Nuts (10-32 Diameter)
Step 2: Hardware Setup
Connect your Arduino to your Ethernet shield
Connect the DHT sensor:
- DHTpin1 -> 5v
- DHTpin2 -> digitalpin2
- DHTpin3 -> not used
- DHTpin4 -> gnd
Step 3: Uploading the sketch to your Arduino
- Download the Arduino IDE if you haven't already (We're using 1.0.5)
- Install Arduino onto your system
Download Libraries: (If you haven't already done so!)
You'll want to drop the library folders into your Arduino application folder. Ours is in: '/user/Documents/Arduino/libraries'. You can always check your Arduino preferences to find out where yours is if you cannot find it.
Once you find your Arduino folder, it should look like this:
Once you've put the libraries in the correct place, restart the Arduino IDE.
- Download the Arduino/Plotly sketch for Temperature and Humidity visualization
- Open the sketch and change "username" and "api_key" to your plotly credentials.
- Upload the sketch to your Arduino!
Step 4: Building the Enclosures
This design is so simple and wonderful, we'll leave it up to you! Its just drilling 8 holes, and assembling!
Remember to be accurate with your holes, as they have to match up. Measure twice, drill once! :D
Step 5: Wrapping it all up!
- an Arduino that is programmed (not plugged into your router yet!)
- an Arduino that is nicely bundled up into some kind of enclosure
- Plug in your Arduino to your router with the Ethernet cable
- Plug in your Arduino to power with the 9V Wall adapter
- After a few minutes, check your filewell on Plotly, and you will see your data! Refresh it to see new data as it is added! (With the example sketch, your plot will update every five minutes)
Click here to check out an example using data taken from our living room in Montréal!