I have a well tested hardware project that can display temperature and other analogue/digital sensors on a embedded website, and also send them as a GET request every minute.
I call it Stokerbot, since it was originally meant for monitoring Stoker furnace, today it is used for many different things like server rooms, pools, farms, solar heat, etc.
These boards are just what you need to monitor your mining rig/door/window/pool/etc
I have 2 models, S3S and S3XS.Features that they share are.
Atmega1284P 40pin DIP based
3x1-wire bus with 9/10 3pin plugs for plug'n'play with cheap DS18B20 probes (ebay etc).
Reverse polarity protected.
4 analoge pins
4 digital pins
TTL serial plug 6pin straight
Onboard SystemID (DS2401) and temperature (DS18B20)
Uses ENC28J60 for network.Features that set them asideStokerbot S3S.
5V logic and inputs, runs off 9-12Vdc
9 temperature connectors
1 LCD connector for serial LCD backpack (LCD Logic)
2 expansion ports with 8pins and 2 power pins each (I2C, etc, not all unused).
2x3 screw terminals for 1-wire besides the 9 connectorsStokerbot S3XS.
3V3 logic and inputs, runs off 6-9Vdc
10 temperature sensors
2 onboard LEDs connected to 2 of the digital outputs, red/green.
Both boards are based on tuxgraphics code(http://tuxgraphics.org/electronics/
), which is opensource GPL.
Prices including shipping worldwide
Inside EU : S3S:109USD S3XS:69USD
Outside EU/EU business : S3S:89USD S3XS:55USD
Price converted to BTC at time of order, using mt. gox last
They can both be used with http://stokerlog.dk
, however the site is only in Danish for now.
SMD is reflow soldered in DIY oven, PTH is hand soldered with temperature controlled iron.
Both processes and all components are RoHS.
Supply is not endless, I currently have a few of each model in stock.
Feel free to ask/comment/etc