--- product_id: 565790052 title: "SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader" brand: "sparkfun" price: "C$2524" currency: NIO in_stock: true category: "Spark Fun" url: https://www.desertcart.ni/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple store_origin: NI region: Nicaragua --- # Configurable baud rates up to 115200bps Supports up to 64GB microSD Ultra-low 5-6mA power consumption SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader **Brand:** sparkfun **Price:** C$2524 **Availability:** βœ… In Stock ## Summary > πŸ’‘ Capture every byte, power every project β€” the OpenLog advantage! ## Quick Answers - **What is this?** SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader by sparkfun - **How much does it cost?** C$2524 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple) ## Best For - sparkfun enthusiasts ## Why This Product - Trusted sparkfun brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Robust & Open-Source:** Open-source hardware with simple serial interface and status LEDs keeps you in control and ahead of the curve. - β€’ **Power-Efficient Design:** Consumes just 5-6mA during recording, perfect for long-term projects without draining your power source. - β€’ **Massive Storage Capacity:** Log massive datasets effortlessly with microSD support up to 64GBβ€”never run out of space for your critical data. - β€’ **Blazing Fast Data Transfer:** Configurable baud rates up to 115200bps ensure your data streams smoothly and reliably in real-time. - β€’ **Plug & Play Arduino Compatibility:** Preprogrammed ATmega328 with Optiboot bootloader makes integration seamless with Arduino Uno and Pro boards. ## Overview The SparkFun OpenLog is an open-source serial data logger featuring an onboard ATmega328 microcontroller running at 16MHz with Optiboot bootloader. It supports microSD cards up to 64GB (FAT16/32), configurable baud rates up to 115200bps, and operates with ultra-low power consumption (~5-6mA). Designed for seamless Arduino compatibility, it acts as a reliable black box for scientific data capture and debugging. ## Description The SparkFun OpenLog is an open source data logger that works over a simple serial connection and supports microSD cards up to 64GB. The OpenLog can store or log huge amounts of serial data and act as a black box of sorts to store all the serial data that your project generates, for scientific or debugging purposes.The SparkFun OpenLog runs off of an onboard ATmega328, running at 16MHz thanks to the onboard crystal.The ATmega328 has the Optiboot bootloader loaded on it, which allows the OpenLog to be compatible with the "Arduino Uno" board setting in the Arduino IDE.The OpenLog draws 6mA when recording a 512 byte buffer, but as that process takes a fraction of a second, the average current draw is closer to 5mA. Keep in mind though that if you are recording a constant data stream at 115200bps, you will approach that 6mA limit.All data logged by the OpenLog is stored on the microSD card that involve the features of 64MB to 64GB capacity and FAT16 or FAT32 file type.The primary interface with the OpenLog is the FTDI header on the board edge. This header is designed to plug directly into an Arduino Pro or Pro Mini, which allows the microcontroller to send the data over a serial connection to the OpenLog. ## Features - Store huge amounts of data from your project any 512MB to 32GB microSD card should work. - Power input: 3.3V-12V (Recommended 3.3V-5V). Power expenditure of 2mA idle, 23mA at maximum recording rate. - Simple command interface. Includes four SPI pogo pins, two LEDs that indicate writing status. - Runs off of an onboard ATmega328 at 16MHz thanks to the onboard resonator. Has the Optiboot bootloader. - Acts as a black box to store all the serial data from your project, for scientific or debugging purposes. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B079LPZ4YD | | Best Sellers Rank | #118,481 in Computers ( See Top 100 in Computers ) #1,916 in Single-Board Computers | | Brand | SparkFun | | Compatible Devices | Arduino Uno compatible devices | | Customer Reviews | 4.0 4.0 out of 5 stars (18) | | Digital Recording Time | 8 hours | | Format | MP3 Audio | | Hardware Interface | MicroSD | | Headphones Jack | No headphones jack | | Item Weight | 0.01 Kilograms | | Manufacturer | SparkFun Electronics | | Memory Storage Capacity | 64 GB | | Mfr Part Number | DEV-13712 | | Microphone Form Factor | Built-In | | Microphone Operation Mode | Mono | | Model Number | SparkFun OpenLog | | UPC | 845156006540 | ## Product Details - **Brand:** SparkFun - **Compatible devices:** Arduino Uno compatible devices - **Format:** MP3 Audio - **Hardware interface:** MicroSD - **Microphone form factor:** Built-In ## Images ![SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader - Image 1](https://m.media-amazon.com/images/I/61VMo1BlyKL.jpg) ![SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader - Image 2](https://m.media-amazon.com/images/I/71OujgyYjVL.jpg) ![SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader - Image 3](https://m.media-amazon.com/images/I/61molWoi6DL.jpg) ![SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader - Image 4](https://m.media-amazon.com/images/I/51CHIDabK5L.jpg) ![SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader - Image 5](https://m.media-amazon.com/images/I/51nLWeM7zrL.jpg) ## Frequently Bought Together - SparkFun OpenLog Open-source data logger works over a simple serial connection Supports microSD FAT16/32 cards up to 32GB Configurable baud rates up to 115200bps Preprogrammed ATmega328 and bootloader - Lexar 32GB Micro SD Card 3 Pack, microSDHC UHS-I Flash Memory Card with Adapter - Up to 100MB/s, U1, Class10, V10, A1, High Speed TF Card (3 microSD Cards + 1 Adapter) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ni/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple](https://www.desertcart.ni/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple) --- *Product available on Desertcart Nicaragua* *Store origin: NI* *Last updated: 2026-07-06*