OpenLog Blackbox Serial Data Logger Module (microSD, Cleanflight Compatible)

The OpenLog Blackbox is a compact serial data logger designed to record large amounts of data directly to a microSD card using a simple UART interface. It is widely used as a blackbox flight data logger for Cleanflight, Betaflight, Naze32, F3/F4 flight controllers, and general microcontroller projects.

This module comes preloaded with openlog_blackbox_v2.0 firmware and uses an ATmega328P (5V, 16 MHz) bootloader by default. It allows reliable logging of high-speed serial data for later analysis, debugging, and visualization.

Key Features

• Wide Input Voltage Range: 3.3V – 12V (3.3V–5V recommended)

• microSD Card Support: FAT16/FAT32, up to 64GB

• Simple Serial Interface: Easy UART-based data logging

• Configurable Baud Rate: Adjustable via CONFIG.TXT file

• Low Power Consumption:

  • Idle: ~2mA

  • Logging: up to ~6mA

• Status LEDs: Two onboard LEDs indicate write and activity status

• SPI Pogo Pins: Four SPI pogo pads for advanced interfacing

• Reliable Blackbox Logging: Ideal for flight controllers and embedded systems

Typical Applications

• Cleanflight / Betaflight blackbox logging

• Drone and UAV flight data recording

• Embedded system debugging

• Serial data capture for Arduino, STM32, ESP-based projects

• Long-term sensor and telemetry logging

Firmware & Tool Support

• Log Viewer:
  https://github.com/cleanflight/blackbox-log-viewer

• Log Decode / Render Tools:
  https://github.com/cleanflight/blackbox-tools

Recorded logs can be:

• Viewed interactively

• Converted to CSV for analysis

• Rendered as flight replay videos

Configuration (CONFIG.TXT)

1. Insert a microSD card into the OpenLog module

2. Power the module for ~10 seconds, then power it off

3. Insert the microSD card into your computer

4. Open CONFIG.TXT and set the baud rate (commonly 115200 or 250000)

5. Save the file and reinsert the card into the OpenLog

If CONFIG.TXT is missing, create it manually in the root directory of the microSD card.

Detailed usage guide:
https://github.com/cleanflight/cleanflight/blob/master/docs/Blackbox.md

Technical Specifications

• MCU: ATmega328P (5V, 16 MHz)

• Input Voltage: 3.3V – 12V

• Recommended Voltage: 3.3V – 5V

• Storage: microSD (FAT16/FAT32), up to 64GB

• Interface: UART (Serial)

• Idle Current: ~2mA

• Max Logging Current: ~6mA

Package Includes

• 1 × OpenLog Blackbox Serial Data Logger Module