Pachube_8281Arduino feed of LM335 temperature sensor to the cloud.
This is an extension of the LM335 temperature sensor circuit adding internet logging capabilities to the Arduino using Pachube (patch-bay). It is basically the same circuit with the Tellymate and Arduino (Wiznet) EthernetShield added, so I will point you to the original LM335 plans.
Everything is stock so far, no modifications have been made to the ethernetShield or the Arduino. I do get the freezing problem with the Arduino quite regularly, so a reset is indeed needed. My solution was to use an old Arduino Atmega8 I have lying around and program it is a "resetter". A simple sketch with digitalWrite to pin 9 (hooked up to the Arduino RESET) gives me a hard reset every 30 minutes.
Wiring to Pachube is a breeze, but could not figure out how to send proper results using "sprintf()". In the end I just sent comma-delimted values using "localClient.print" and bypassed the "pachube_data" array as set up in the tutorial sketch. Also I am very impressed by the speed, reliability and level of online documentation for Pachube-- hopefully this will stay around as a sustainable business model even if they start charging for their services. Good stuff.
Porthole and the QR image generator are quite interesting as well for Pachube feed visualization and physicalisation.
>>Project Zip Files arduino/sketches/ pachubeLm335zTemperatureSensor_v1