Ed Mallon runs the Cave Pearl Project which is all about “developing a data logging platform from inexpensive pre-made breakout boards, and are using this at the heart of new environmental sensors that anyone can build.” Ed is also a contributor in the forum, and has posted a great in-depth tutorial that steps through making a submersible data logger. From the blog’s own summary:
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.
MoteinoMEGA based Cave Pearl in ‘Prototyping Trim’ with I2C OLED screen & ADS1115 ADC. INT1 & Aref jumpered. The built also includes an RTC backed up by a coin cell.
It’s great to see Moteinos being put to serious work in such interesting and niche projects. While a custom PCB could be built to reduce the amount of wiring and make for a more compact logger/breakout solution, this tutorial is targeted and perfect for those who want to learn the skill of building data loggers or similar projects using off the shelf components. Thanks Ed and the Cave Pearl Project!
