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
-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