Uberlogger - Professional Data Logging Device

Built for Engineers

Everything you need for reliable data acquisition in a compact, standalone device.

8 Analog Channels

Simultaneously measure 8 voltage channels with selectable ranges of +/-10V and +/-60V per channel.

Temperature Logging

Connect up to 8 NTC temperature sensors. Each of the 8 inputs is selectable between analog voltage and NTC.

6 Digital Inputs

Monitor digital signals alongside analog data for complete system observation.

Wi-Fi Control

Remote access via hotspot or connect to your network. Full REST API for programmatic control.

SD Card Storage

Log for days on 32GB SD cards without requiring a connected PC. True standalone operation.

Open Source

Full firmware source code on GitHub. Customize and extend functionality for your specific needs.

Product Gallery

Take a closer look at the Uberlogger UL01 from every angle.

Technical Specifications

Complete specifications for the Uberlogger UL01 data acquisition device.

Analog Inputs

Number of Channels 8 (shared analog / NTC)

ADC Resolution 12-bit / 16-bit

Voltage Range (Low) +/- 10V

Voltage Range (High) +/- 60V

Range Selection Per channel

Input Impedance 100 kΩ

Input Accuracy +/- 0.5%

Digital Inputs

Number of Channels 6

Input Range +/- 60V

Logic Thresholds LOW < 1V / HIGH > 2V

Trigger Modes External trigger support

Temperature

Sensor Type NTC Thermistors

Max Sensors 8

Compatible Sensors 10 kΩ NTC (β=3950)

Sampling

Sample Rate Once per hour – 250 Hz

Simultaneous All channels

Custom Labels Supported

Connectivity

Wi-Fi 802.11 b/g/n (2.4 GHz)

Security WPA2 / WPA3

Mode AP / Station

Interface Web UI + REST API

Web UI Access Optional password

API Documentation OpenAPI Spec

Storage & Data

Storage SD Card

Max Capacity Up to 32GB (FAT)

Max File Size 4GB

File Format CSV / RAW

File Splitting Configurable

Software

Firmware Open Source

Platforms ESP32 + STM32

Repository GitHub

3D Enclosure STL Available

Power & Physical

Power Supply USB-C, 5V

Max Current 300 mA

Real-Time Clock Battery-backed (UTC)

Dimensions 148 × 77 × 23 mm

Firmware Updates

Latest Version v1.3.1

Update Method OTA / SD Card

Conversion Tool Python / Executable

Downloads

Get the latest firmware, documentation, and 3D printable enclosure files.

Firmware

v1.3.1 (Latest)

New Wi-Fi "Client mode only" option to join an existing network
Hold the mode button 5 seconds to reset Wi-Fi/web credentials
Several stability fixes for the web interface and logging
Complete firmware package with conversion tool

Download v1.3.1

Previous Versions

v1.3.0 | v1.2.1 | v1.2.0 | v1.1.4

Source Code

ESP32 Firmware
STM32 Firmware

Documentation

Online Documentation

Complete user guide, API reference, and tutorials.

View Docs

PDF Downloads

Quickstart Manual (PDF)
Datasheet (PDF)

Hardware Files

3D Enclosure (STL)

Printable lid and enclosure for the UL01.

Download STL

$ git clone github.com/paulusTecnion/uberlogger-esp32
Cloning into 'uberlogger-esp32'...

$ cd uberlogger-esp32 && make build
Building ESP32 firmware...
Building STM32 firmware...
Build complete!

$ make flash
Flashing to device... Done!

Open Source Firmware

The Uberlogger firmware is fully open source, available on GitHub. Customize the device for your specific application, add new features, or integrate with your existing systems.

Built on proven platforms:

ESP32 - Wi-Fi connectivity and web interface
STM32 - Precise analog data acquisition

View on GitHub Documentation

Professional Data Logging Made Simple