The SparkFun 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. ânewâ will create a new file. âmdâ makes a directory. â?â brings up the list of commands. OpenLog doesnât do a lot, but it does log serial streams extremely well. Example: >new testfile.txt >append testfile.txt <(send large amounts of text followed by three ctrl+z characters) Thatâs really it! OpenLog firmware is open source and is based on Bill Greimanâs sdfatlib. OpenLog currently supports FAT16 and FAT32 microSD cards (weâve tested up to 64GB!). All the design files (schematic, PCB layout, firmware) are open source released under the CC-SA v3 license and are available through GitHub.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.Features:Log to low-cost microSD FAT16/32 cards up to 16GBSimple command interfaceEdit config.txt file from a computer to change baud rate and other system settingsThree modes:NewLog creates a new log every power up and immediately starts loggingSeqLog appends a file called âSeqLog.txtâ at every power up and immediately starts loggingCommand mode starts OpenLog at a command prompt at power upConfigurable baud rates (2400 to 115200bps)Configure unit through config file or the menu systemPower, ground, and RX-I are the minimum connectionsReprogrammable ATmega328 using the Arduino IDETwo LEDs indicate writing statusInput voltage from 3.3V to 12V2mA idle, 6mA at maximum recording rateDimensions: 0.16 x 0.6 x 0.75" (4 x 15 x 19mm)Documents:Example Arduino SketchesCommand SetDatasheetDatalogger comparisonSchematicHow to upgrade the firmwareHow do I us
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