petrovicks / kremens-depthfinder Goto Github PK

Simple Arduino-based NMEA datalogger.

NMEA sentence documentation: http://aprs.gids.nl/nmea/

NOTE: Uses custom SD card reader library: https://github.com/adafruit/SD

Hardware Notes:

• Arduino Mega 2560
• seedstudios SD card reader shield
• Both peripherals continually transmit at 1Hz.
• Garmin GPS
  • https://static.garmincdn.com/pumac/GPS16x_TechnicalSpecifications.pdf
  • WIRING
    • RED: Vin (8-40 Vdc, 12V ideal)
      • ~780mW typical consumption
    • BLK: Ground
    • BLU: RS232 input
    • WHT: RS232 output
  • Utilizes traditional RS232, requires hardware inversion and level shifter to utilize the ATMega2560 UART.
  • Configured to automatically transmit all NMEA GPS minimum messages, GPRMC used for this project.
• Northstar D210 Explorer (depthfinder)
  • http://www.northstarnav.com/upload/Northstar/Documents/D210.pdf WIRING
    • RED: Vin (12Vdc, sensitive to noise)
    • BLK: Ground
    • ORAN: 12V, 100mA buzzer
    • BWN: 5V RS232 signal