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Fermion: Serial Data Logger V2.0 Module

SKU: TEL0148

The Fermion: Serial Data Logger Module offers advanced data storage solutions compared to previous models. It supports a 32GB TF card for extended storage and features USB connectivity for easy file access without a card reader. Its onboard LED indicator provides visual confirmation of data writing, while the SAVE pin allows for efficient data management, making the module ideal for long-term data logging and retrieval.

Front of black circuit board with USB and microSD slot, serial data logger for Arduino-DFRobot product sku:TEL0148 image.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Getting Started

    This article guides first-time users through formatting SD cards, powering on modules, and configuring file parameters, ensuring proper data storage and management.

    2. Example for Arduino-Data Logging

    This article presents a comprehensive example of how to write data using Arduino and a Serial Data Logger, including hardware/software requirements, connection diagrams, and sample code.

    3. Example for Arduino-Write Data in CSV Format

    This article provides a step-by-step guide on how to write data in CSV format using Arduino and a Serial Data Logger, complete with hardware requirements, connection diagrams, sample code, and running results to help hobbyists and enthusiasts effectively log data.

    4. TEL0148 V1.0 Firmware Upgrade

    The article offers a detailed guide on upgrading the TEL0148 V1.0 firmware to avoid data recording errors, including formatting storage, setting baud rates, and connecting to the maincontroller serial port, ensuring optimal module performance for users purchasing before May 2022.

    Specification

    SIZE

    Parameter Value
    Supply Voltage 3.3V~5V
    Operating Current 10mA
    USB Protocol USB2.0
    Operating Temperature Range -20℃~65℃
    Operating Humidity Range 5%RH~85%RH
    Dimension 23×29mm/0.91×1.14"

    Pinout

    Num Silkprint Description
    1 VCC Power VCC
    2 GND Power GND
    3 RX UART Receive
    4 TX UART Transmit
    5 S SAVE pin/button, save the current file, and create a new file to store the following data, save data at low level.

    SD LED indicator is the one for data interaction between module and storage. It blinks when data is being written or a new file is being created.

    FAQ

    • I have a fermion serial data logger and need to use this with pico pi and python. Does anyone have starters on wiring and code before I senf myself down the wrong path. There doesn't seem to be much documentation alternative to arduino. I am doing this to get data into Matlab.
      Many Thanks

      I have a fermion serial data logger, but when I initialize it the .txt file is not generated, what can I do?

    • When will the module enter USB flash drive mode? When to enter data storing mode?
      When a USB host is used to connect the module, the module enters the USB flash drive mode, at the time data can't be stored in the module and the CONFIG.TXT file and new blank files will not be automatically generated when the module is powered on. In other cases, the module enters the data storing mode, and the CONFIG.TXT file and new blank files will be generated automatically if the module doesn't have a CONFIG.TXT file.
    • What can I do if a file cannot be deleted?
      Please format the storage first, and then refer to the methods in "For First Time Use".
    • The CONFIG.TXT file isn't automatically generated when the module is powered on.
      Check whether the USB host is used to power the module first, and then check whether the file system for storage is FAT32.
    • The SD indicator is not lit when data is rapidly written to the module.
      The SD card has write endurance cycles of 100 thousand times. In order to ensure the SD life, write to SD card once about 50ms or 512 bytes after the module writes to data.

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