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Gravity: I2C to Dual UART Module

SKU: DFR0627

The Gravity: I2C to Dual UART Module is designed to expand the number of available UART ports on controller boards like Arduino and Raspberry Pi, offering a solution for applications requiring multiple UART connections. With independent configurations for baud rate, word length, and check format, this module supports up to 8 hardware serial ports through multiple connections, making it ideal for use with IoT modules, ultrasonic ranging, and GPS modules. Its 256-byte FIFO hardware buffer for each UART ensures efficient data transmission, and with a data transmission rate of up to 1Mbps and a communication rate of 2Mbps, it caters to projects with strict timing requirements, such as IR receiver modules and WS2818 RGB projects.

Front of I2C to UART converter module with Arduino UART expander, color-coded pins and microcontroller.-DFRobot product sku:DFR0627 image.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Example Code for Arduino-String Analysis and Char Removal

    The article presents a detailed guide on how to analyze and modify strings in Arduino using UART communication. It includes a sample code to demonstrate how to remove specific characters from a string, providing a comprehensive understanding of string manipulation in Arduino.

    2. Example Code for Arduino-UART Self-Transmit and Receive

    Write a demo to allow UART1 and UART2 to realize the function of self-transmitting and self-receiving. Connect pinT of UART1 to its pinR, UART2 TX to its RX. UART1 transmit "hello,Serial1", UART2 transmit "123", then receive their own data and print them out. Experiment phenomenon: connect the TX to RX in Sub UART1 and UART2. Read the data sent by Sub UART and print it out.

    Reference

    The article provides detailed guidance on configuring and utilizing the IIC to dual UART module, including library installation, communication protocol description, API usage, and baud rate settings, allowing users to integrate efficient serial communication into their projects.

    Specification

    Parameter Value
    Operating Voltage 3.3V-5V
    Operating Current <3mA
    Communication Port Gravity-IIC 4Pin
    IIC Address regulated by transmission protocol, refer to tutorial
    Extended UARTs 2
    Dimension 32.5×27mm
    Mounting Hole Size 20mm
    Operating Temperature -40℃~85℃

    DFR0627 Size

    Pinout

    DFR0627 Size

    Silkscreen Description
    D IIC SDA
    C IIC SCL
    - Negative
    + Positive
    T Transmit
    R Receive

    FAQ

    • Is there an english language version of the weikai wk2132-issg datasheet available?

      After contact with manufactor of the WK2132, they also donot have the English ver.
      But they give us the English datasheet of WK2124 which we think you could refer to.
      The WK2132 could use IIC UART SPI to lead out two UART interface.
      While the WK2124 could only use SPI, but it could lead out four UART interface.
      But the remaining parameters of these two ICs are basically the same.
      https://github.com/YeezB/WK...

    • The module does not work when everything is fine, what should I do?
      Check whether all the DIP switches are at the position of "1", when it still does not work after you switched them to 1 already, reset the module by connecting the pinSRT to pin-(negative) for 3s or you can try powering off the module and restart the program.

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