Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of 
Wanted to share my most recent attempt at a customized Arduino based (Mega2560) data logger board. I’ve used a Silicon Labs CP2104 USB interface and also contains:
-DS3231 RTC with Battery B/U
-uSD Card
-4MB MRAM (SPI interface)
– 3 Serial Port Headers (3.3V/5V) **I left Serial dedicated to the USB, but Serial1, 2, and 3 are avail.
-3.3V/5V I2C headers
-3.3V/5V SPI headers
All digital pins pushed out to screw terminals.
This board has the standard Arduino Mega bootloader and can use the Arduino IDE as if it were a normal Mega2560. I’ve also made the width of the board long enough to fit these DIN Rail style board holders for larger enclosure usage.DIN RAIL CCA Holders
Is this board available somewhere ?