Gravity: Serial Data Logger

DFRobotSKU: TEL0147
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The Gravity: Serial Data Logger can store data conveniently and supports direct data printing through the serial port without additional code.

The Serial Data Logger provides an onboard 128MB Flash memory meaning no microSD card is required. The module comes with a USB-C function allowing you to directly connect it to a computer to read the stored files without the need for a card reader. The onboard LED indicator allows data writing status to be viewed visually, whilst the onboard Save key makes it easier to store data into separate files.

A product wiki is available to help you get started!

Connection Example - Arduino


  • USB function, no card reader required
  • Onboard 128MB Flash memory, no TF card required
  • Support multiple baud rates, good compatibility
  • LED indicator for viewing data writing status visually


  • Supply Voltage: 3.3V~5V
  • Operating Current: 32mA
  • USB Protocol: USB2.0
  • Operating Temperature Range: -30℃~85℃
  • Operating Humidity Range: 5%RH~85%RH
  • Dimension: 32×27mm


Package Contents

  • 1x Gravity: Serial Data Logger
  • 2x 2.54mm 5-pin Single-row Connector
  • 1x Gravity 4-pin I2C/UART Sensor Cable


Num Silkprint Description
1 VCC/+ Power Positive
2 GND/- XX
3 RX/R UART Receive
4 TX/T UART Transmit
5 S/SAVE Save pin/button

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