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SparkFun OpenLog Data Logger
OpenLog is an open source data logger. Simple to use, simple to change. We wanted to create a serial logger that just worked. Power up this device and it will start logging any received serial data at 9600bps. Sending Ctrl+z three times will drop out of logging and in to command mode. 'new' will create a new file. 'md' makes a directory. '?' brings up the list of commands. OpenLog doesn't do a lot, but it does log serial streams extremely well. Example:
That's really it! OpenLog firmware is open source and is based on Bill Greiman's sdfatlib. OpenLog currently supports FAT16 and FAT32 microSD cards (we've tested up to 16GB!).
Note: New firmware is available which allows the OpenLog to be used in Arduino 1.0 and also allows for higher baud rates. Check the links below for more information.
- Log to low-cost microSD FAT16/32 cards up to 16GB
- Simple command interface
- Edit config.txt file from a computer to change baud rate and other system settings
- Three modes:
- NewLog creates a new log every power up and immediately starts logging
- SeqLog appends a file called "SeqLog.txt" at every power up and immediately starts logging
- Command mode starts OpenLog at a command prompt at power up
- Configurable baud rates (2400 to 115200bps)
- Configure unit through config file or the menu system
- Power, ground, and RX-I are the minimum connections
- Reprogrammable ATmega328 using the Arduino IDE
- Two LEDs indicate writing status
- Input voltage from 3.3V to 12V
- 2mA idle, 6mA at maximum recording rate
Dimensions: 0.16 x 0.6 x 0.75" (4 x 15 x 19mm)