Objective: To provide cost effective real time display and logging of temperature and relative humidity in multiple vivaria as well as to log this data for other display purposes.
Basic: – A combined temperature and humidity probe that has a very small footprint, is protected from excess moisture, and has a long (10ft+) cable from the probe itself to the controller – Controller displayed readings of temperature and humidity based on probe number – Computer displayed readings of temperature and humidity based on probe number as well as the ability to log the data and make calculations from it (e.x. 24 hour high and low temp/RH, daily averages, weekly averages, etc) -The ability to connect 4 or more probes to the controller
Advanced: – The ability to turn on and off a device (e.x. a fan) based on probe readings – Based on temperature readings, have an audible alarm/tweet/e-mail notification/SMS message sent – The ability to access data via the internet (e.x. while on vacation or at work)
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Cost of materials + $100 for display, data logging, alerting for less than < $80 assembled unit with 4 probes. While the challenge is exiting the pay scale should be more like $50 – $100 a hour. Likely costing several thousand in development for a final product that can be shipped to hobbyists.
This is easily done in the home automation world…
In fact I’m pretty much doing this now…
Sheevaplug running debian squeeze and heyu
RFXCOM 433.92MHz USB Receiver
Various 1-wire, oregon, or digimax RF sensors
Various lamp/appliance modules
Basic shell scripting…