Detailed instructions of how to build an ATmega 1284p based data logger: [via]
In this tutorial, a logger is built using a 3.3v Moteino MEGA with a 1284p CPU @ 16Mhz, w 4K eeprom,16K SRAM for variables & 128K program space. Considerably more than the 328’s 1K eeprom, 2K ram & 32K progmem. Also has a spare serial port for GPS/NEMA sensors.
See the full post on Underwater Arduino Data Loggers blog.
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