SKU: 79647313667

OpenLog

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Ships within 48 hours · Estimated delivery Sep 23 - Sep 28

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Description

OpenLogOpenLog is an open source data logger. Simple to use, simple to change. We wanted to create a serial logger that just worked. Power this device up and it will start logging any received serial data at 9600bps. Sending Ctrl+z 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: >new

OpenLog is an open source data logger. Simple to use, simple to change. We wanted to create a serial logger that just worked. Power this device up and it will start logging any received serial data at 9600bps. Sending Ctrl+z 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:

>new testfile.txt
>append testfile.txt


That's really it! OpenLog firmware is open source and is based on Roland Riegel's FAT library. OpenLog currently supports FAT16 (upto 2GB microSD cards). We're working on FAT32 and would love your help!

All the design files (schematic, PCB layout, firmware) are open source released under the CC-SA v3 license and are available through Github.

Features

  • Log to low-cost microSD cards up to 2GB
  • Simple command interface
  • 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)
  • Doesn't drop characters even at full-blast 115200bps
  • Power, ground, and RX-I are the minimum connections
  • Reprogrammable ATmega328 using the standard STK500 serial bootloader
  • Two LEDs indicate writing status
  • Input voltage from 3.3V to 12V
  • 8mA idle, 18mA at maximum recording rate

Dimensions: 0.16 x 0.6 x 0.75" (4 x 15 x 19mm)

Documents

The OpenLog project is housed on github! Please see the wiki for the most up-to-date firmware, feature requests, files, and datasheet specs.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 79647313667

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Reviewed in the United States on May 11, 2026
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★★★★★ 5
great fit.
Size: Large, Color: Black Red
as advertised. great fit and looks great. thick fabric. very comfortable.
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Reviewed in the United States on May 21, 2026
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Dae
Dallas, US
★★★★★ 5
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Size: Small, Color: Black Red
Perfect. I'm 5'9 skinny dude and I normally wear a size medium. I took back the medium and got a small and it fits me perfect.
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Reviewed in the United States on May 24, 2026
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Amazon Customer
Pawtucket, US
★★★★★ 4
Runs Small
Size: X-Large, Color: Black_a
I own several embroidered Western shirts by known manufacturers, including one purchased on Amazon. All are XL, and they fit fine. So I ordered XL on this shirt. I can wear it, but it's not a good fit or very comfortable. Specifically, it is a very slim cut - much slimmer than the dimensions given in the description state. So if you are a slim guy, no problem - order your usual size. If you are stocky, as I am, go up a size. In every other way, I really love the shirt - beautiful embroidery, very nicely made. I love the contrasting colors inside the collar and placket (inside of the snaps). I have re-ordered in XXL and hope and think this will fit fine. Not to figure out how to return this from the Philippines....
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Reviewed in the United States on November 30, 2023
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Joseph roginski
Natrona Heights, US
★★★★★ 5
EL PIONEER FLORAL AND HORSESHOE EMBROIDERY
Size: Large, Color: Black_a
EXCELLENT FIT EXCELLENT LOOK WOULD HIGHLY RECOMMEND TO ANYONE WHO LIKES THE COWBOY LOOK ALSO EXCELLENT CHOICE OF COLORS🤠🤠🤠🤠
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Reviewed in the United States on March 12, 2026

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