OpenLog Open Source Data Logger

Features:

• OpenLog open source data logger
• Supports microSD cards up to 32GB
• Can log serial data on a serial bus to store all the serial data that your project generates
• Useful for scientific or debugging purposes.
• Uses an ATmega328 running at 16MHz
• Draws approximately 2-3mA in idle (nothing to record) mode
• During a full record OpenLog can draw 10 to 20mA depending on the microSD card being used.
• All data logged by the OpenLog is stored on the microSD card.
• Any 512MB to 32GB microSD card should work.
• OpenLog supports both FAT16 and FAT32 SD formats.

Specifications:

• Power Supply Voltage: 3.3V-12V (Recommended 3.3V-5V)
• Simple command interface
• Configurable baud rates (up to 115200bps)
• Preprogrammed ATmega328 and bootloader
• Four SPI pogo pins
• Two LEDs indicate writing status
• Current: 2mA idle, 6mA at maximum recording rate
• Logic Level: 3.3V / 5V
• Supports Micro SD cards and Micro SDHC high-speed FAT16/32 cards up to 32GB
• Communication Protocol: SPI and FTDI (SPI for reprogramming the Atmega328 bootloader and FTDI for data transmission)
• Primary interface: FTDI that can be connected directly to an Arduino to send data over a serial connection to the OpenLog
• Micro SD card port on board
• RXI Input: 2.0V-3.8V
• TXO Output: 3.3V
• 2 Status LEDs:
  • Right LED: Indicator LED toggles on/off when a new character is received. This LED blinks when Serial communication is functioning.
  • Left LED - LED blinks when the SPI interface for loading the Atmega382 bootloader is active. You will see it flash when the OpenLog records 512 bytes to the microSD card.
• Pinout:
• BLK: Ground 0V
• GND: Ground 0V
• VCC: 3.3V-12V (Recommended 3.3V-5V)
• TXO: Transmit Output
• RXI: Receive Input
• GRN: Data Reset
• How to connect to FTDI Basic: (See diagram in images)
• OpenLog BLK → FTDI Basic GND
• OpenLog GND → FTDI Basic GND
• OpenLog VCC → FTDI Basic 3.3V
• OpenLog TXO → FTDI Basic RXI
• OpenLog RXI → FTDI Basic TXO
• OpenLog GRN → FTDI Basic DTR