> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Gravity: IIC to Dual UART Module

**Type:** Product page · **SKU:** DFR0627 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-iic-to-dual-uart-module.html ([markdown](https://core-electronics.com.au/gravity-iic-to-dual-uart-module.html.md))

This IIC to Dual UART module offers data transmission rate up to 1Mbps, and each sub UART has independent 256-byte FIFO hardware buffer for transmitting and receiving. The baud rate, word length, and check format of every sub UART can be set independently.

## Pricing

- **Price:** $13.50 (inc GST) — $12.27 AUD, exc GST
- **Quantity discounts:** 6+ $11.65 (exc GST) · 12+ $11.16 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 250 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0627:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/DFR0627:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This IIC to Dual UART module offers data transmission rate up to 1Mbps, and each sub UART has independent 256-byte FIFO hardware buffer for transmitting and receiving. The baud rate, word length, and check format of every sub UART can be set independently. The module provides 2Mbps maximum communication rate. At most four such modules can be connected onto one controller board to expand 8 hardware serial ports. This IIC to dual UART module can be extremely suitable for using with IoT module, Ultrasonic ranging module and GPS module.

There are usually only 1 or 2 UARTs on Controller boards like [Arduino](https://core-electronics.com.au/arduino.html), [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html), [micro:bit](https://core-electronics.com.au/micro-bit-australia.html), etc. And one of them must be used in program downloading or debugging. When your application needs to connect several UART devices, you may find that there are not enough UARTs on main-board for connecting. Thus, this module could be a perfect solution for the above situation, or you can use this product in IR receiver module and WS2818 RGB relevant projects with strict timing requirements.

### Features

- IIC to dual UART
- Up to 2Mbps communication rate
- Expand 8 hardware serials at most
- Sub UART receive/transmit independently
- Independent setting for band rate and word length of Sub UART

###  Applications

- Internet of Things Module
- Ultrasonic Ranging Module
- GPS Module
- Speech Synthesis Module

**Specifications**

- Operating Voltage: 3.3V~5.5 V
- Operating Current: <3mA
- Communication Port: Gravity-IIC 4Pin
- Expanded UART: 2
- Operating Temperature Range: -40°C ~ 85°C
- Dimension: 32.5\*27mm/1.28\*1.1 inches

![Gravity: IIC to Dual UART Module](https://image.dfrobot.com/image//data/DFR0627/1.jpg)

Documents

- [Product wiki](https://wiki.dfrobot.com/Gravity%3A%20IIC%20to%20Dual%20UART%20Module%20SKU%3A%20DFR0627)

Parts List

- Gravity: IIC to Dual UART Module x1
- Gravity-4P I2C/UART Sensor Connector x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0627-1.jpg)