Summary of Pachube Client using Arduino
This project demonstrates how to use an Arduino Ethernet Shield to send sensor data to Pachube.com, a free datalogging service. It requires creating a Pachube account and feed, then connecting an analog sensor (like a CDS photocell) to the Arduino. The Ethernet shield interfaces via SPI pins (10–13) and connects to the network through an Ethernet cable. Sensor readings are uploaded every 10 seconds using the Pachube API. The project supports Arduino Ethernet Shield or compatible boards with a Wiznet Ethernet module.
Parts used in the Pachube Sensor Client Project:
- Arduino board (Shield-compatible)
- Arduino Ethernet Shield (Wiznet Ethernet module)
- CDS photocell sensor
- 10k ohm pull-down resistor
- Ethernet cable
This example shows you how to answer a HTTP request using an Ethernet shield. Specifically, it connects to pachube.com, a free datalogging site. The example requires that you set up a pachube.com account, as well as a pachube feed (for more information on setting up an input feed, please click here). Your Ethernet shield will then connect to that feed and upload sensor data every 10 seconds.
Software Required
- pachube.com account
- pachube.com feed that accepts two data items
Circuit
The Ethernet shield allows you to connect a WizNet Ethernet controller to the Arduino via the SPI bus. It uses pins 10, 11, 12, and 13 for the SPI connection to the WizNet. Later models of the Ethernet shield also have an SD Card on board. Digital pin 4 is used to control the slave select pin on the SD card.
The shield should be connected to a network with an ethernet cable. You will need to change the network settings in the program to correspond to your network.
image developed using Fritzing. For more circuit examples, see the Fritzing project page
In the above image, your Arduino would be stacked below the Ethernet shield. You could also use an Arduino Ethernet board.
Schematic
Pictured: One CDS photocell with 10k ohm pull down resistor on analog pin 0.
Code
/*
Pachube sensor client
This sketch connects an analog sensor to Pachube (http://www.pachube.com)
using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
the Adafruit Ethernet shield, either one will work, as long as it’s got
a Wiznet Ethernet module on board.
This example has been updated to use version 2.0 of the Pachube.com API.
To make it work, create a feed with a datastream, and give it the ID
sensor1. Or change the code below to match your feed.
Hardware Required
- Arduino Ethernet Shield or Arduino Ethernet
- Shield-compatible Arduino board
- One analog sensor to attached to the Ethernet Shield
For more detail: Pachube Client using Arduino
