Openlog Serial to Micro SD Data logger


10 in stock

SKU: 286-A Categories: , ,

Product Description

Log data to low-cost microSD cards
Simple command interface
Edit config.txt file from a computer to change baud rate and other system settings and then save it as read only file
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

Note: These modules use micro SD cards in SPI mode. Not all micro SD cards support this mode. We have tested SanDisk cards and these work fine. Others may or maynot work.

It is not recommended to change firmware on these modules. These use a clone of ATMega 328 microcontroller and you can render them inoperable if firmware change is attempted.

firmware info at :

you can process the resulting logs on your computer to either turn them into CSV (comma-separated values) or render your log as a video using the tools blackbox_decode and blackbox_render. Those tools can be found in this repository:

You can also view your logs using your web browser with the interactive log viewer:

More description at


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