Temperature and Humidity Datalogger + Webserver. Arduino DDNS (Dynamic DNS) by Open-Electronics.org. Our device is essentially a publisher of IP address.
Everything is made from a circuit that incorporates an Ethernet interface WIZnet WIZ811MJ, managed by an Atmega328 microcontroller programmed with the Arduino bootloader, so it all works like an Arduino and you can use the Arduino IDE. The Atmega I/O PB2, PB3, PB4 and PB5 are dedicated to dialogue with the Ethernet module and provide a full four-wire SPI bus. The microcontroller is programmed using the special interface TTL / USB from SparkFun. R1, R2: 470 ohm R3: 10 kohm C1: 100 nF C2: 470 μF 25 VL C3: 100 nF C4: 470 μF 16 VL U1: WIZNET U2: ATMEGA328P (with Arduino bootloader) U3: LD1086V33 P1: Microswitch LD1: LED 3 mm yellow LD2: LED 3 mm red D1: 1N4007 power jack Dip socket 14+14 Break away headers male 6 via Break away headers female 2x10 via (2 pz)
Arduino Ethernet Shield Tutorial. The Ethernet Shield is based upon the W51000 chip, which has an internal 16K buffer.
It has a connection speed of up to 10/100Mb. This is not the fastest connection around, but is also nothing to turn your nose up at. It relies on the Arduino Ethernet library, which comes bundled with the development environment. There is also an on-board micro SD slot which enables you to store a heck-of-a-lot of data, and serve up entire websites using just your Arduino. This requires the use of an external SD library, which does not come bundled with the software. Give Your Cat Twitter Powers.
Arduino webserver. UIST'09: Enabling Always-Available Input with Muscle-Computer Interfaces. PROGMEM. Reference Language | Libraries | Comparison | Changes Store data in flash (program) memory instead of SRAM.
There's a description of the various types of memory available on an Arduino board. The PROGMEM keyword is a variable modifier, it should be used only with the datatypes defined in pgmspace.h. It tells the compiler "put this information into flash memory", instead of into SRAM, where it would normally go.
Arduino stuff. DIY Arduino.