NOTE! This page is no longer updated
You will find the latest information about MySensors here:
Light Sensor
Software
You can download the Arduino sketch here.
This sensor sleeps most of the time. You can change the sleep interval by updating SLEEP_TIME define at the top of the file.
Wire things up
Follow the instructions in ConnectingRadioModule to connect radio module.
Connect the digital AO (Analog Out) of the light sensor to analog input 0 of Arduino board. Connect VCC to +5V of the Arduino board. GND to GND.
Hardware - Purchase guide
To build this sensor you'll need one arduino + radio specified in the base kit found here:
http://code.mios.com/trac/mios_arduino-sensor/wiki/WikiStart#Buyingguide
With the following additional parts:
1x Light sensor
TOTAL SENSOR PRICE: $7.6 (arduino + radio) + $2.8 (light sensor) = $10.4