--- 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: "S/.391" currency: PEN in_stock: false reviews_count: 5 url: https://www.desertcart.pe/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple store_origin: PE region: Peru --- # 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:** S/.391 **Availability:** ❌ Out of Stock ## Summary > πŸ’‘ Capture every byte, never miss a beat with OpenLog! ## 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?** S/.391 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/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€’ **Status at a Glance:** Dual LEDs and SPI pogo pins provide real-time write status and easy hardware interfacing. - β€’ **Speed That Keeps Up:** Configurable baud rates maxing out at 115200bps ensure no data gets left behind. - β€’ **Plug & Play Simplicity:** Preprogrammed ATmega328 with Optiboot bootloader means instant Arduino IDE compatibility and zero setup headaches. - β€’ **Power-Savvy Performance:** Consumes just 5-6mA on average, perfect for long-term projects without draining your power budget. - β€’ **Massive Storage, Minimal Fuss:** Log massive serial data effortlessly with microSD support up to 64GB FAT16/32. ## Overview The SparkFun OpenLog is an open-source, Arduino-compatible serial data logger featuring an onboard ATmega328 running at 16MHz. It supports microSD cards up to 64GB with FAT16/32 formatting, configurable baud rates up to 115200bps, and ultra-low power consumption averaging 5-6mA. Designed for seamless integration with Arduino Pro/Pro Mini boards, it offers a simple command interface, real-time write status LEDs, and SPI pogo pins for versatile hardware connectivityβ€”ideal for scientific data capture or debugging in professional projects. ## 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. Review: Awsome Review: This is a great little device for logging serial output from a microcontroller. Just connect to the UART and it's preprogrammed to record output. I'm using it to record sensor output to an SD card. The firmware can be customized as needed, but I just used the firmware it shipped with. ## 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 | #106,883 in Computers ( See Top 100 in Computers ) #1,682 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 | | 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) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by B***N on 22 April 2025* Awsome ### ⭐⭐⭐⭐⭐ Review *by C***R on 11 October 2023* This is a great little device for logging serial output from a microcontroller. Just connect to the UART and it's preprogrammed to record output. I'm using it to record sensor output to an SD card. The firmware can be customized as needed, but I just used the firmware it shipped with. ### ⭐ Review *by J***W on 13 November 2019* The logger is great when it works, however the mechanism that holds the SD card in place is extremely fragile and does not last long, I've ordered more than 10 over the past couple of weeks and every single one broke within a couple of days of continuous use. Can not recommend. ## 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.pe/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple](https://www.desertcart.pe/products/565790052-sparkfun-openlog-open-source-data-logger-works-over-a-simple) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-05-01*