Gadget Renesas

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GR-LYCHEE is an IoT prototyping board with camera and wireless(Wi-Fi, BLE). And GR-LYCHEE is the GR reference board for RZ family RZ/A1LU group products. Pin-compatible with Arduino UNO and ARM® mbed™ enabled development platform. You can also sketch like Arduino with Renesas Web Compiler and IDE for GR.


Features of GR-LYCHEE are as follows.

  • Enable to get an image of VGA (640 x 480) with attached camera. When transferring with USB CDC, transfer rate of 60 fps can be realized.
  • OpenCV V3.2 is applied and various SDKs are provided. You can enjoy computer vision right away.
  • Equipped with ESP32. Cloud connection with Wi-Fi, smartphone communication with BLE possible.
  • Equipped with 4-pole audio jack. Audio input / output is possible.
  • SD card can be inserted. Flash Air is also OK.
  • mbed™ easy programming. If you copy it to storage, you can run it.
  • Optional USB A connector can be equipped. Can be used for connection of USB memory etc.

Demonstration movie running OpenCV Canny function (edge detection) with GR-LYCHEE.

Equipped with ARM Cortex-A RZ/A1LU (R7S721030VCFP)
Various Arduino shields can be mounted, but 3.3V I/F.
Camera is attached as standard.Arduino shield
connector, USB host interface connector is not
mounted, parts are attached in -FULL version.

On the back side are a camera interface,
an SD socket and general-purpose LCD
expansion connector is mounted.


Item Description
Micro processor RZ/A1LU (R7S721030VCFP 176pin QFP)
ROM/RAM External FLASH 8MB/internal 3MB
Operating Frequency 384MHz
RTC clock 32.768Hz
Operating Voltage 3.3V/1.18V
Camera Shikino High-Tech KBCR-M04VG-HPB2033
VGA 640x480, up to 60fps
Horizontal angle 98 degree, vertical angle 75 degree
Board Function Camera interface (camera module included)
ESP32 wireless module (Wi-Fi, BLE)
USB peripheral(micro B connector)
USB host (option)
4 pole audio input / output jack
SD socket
LCD connector
User button switch(2 pcs)
Reset button switch
JTAG interface
Connector for Arduino shield(option)
LED for user(4 pcs)


Boards Distributor

GR-PEACH boards and other shields can be purchased through the following sites:

Japanese distributors are here. (日本での購入についてはこちら)

Technical Support

Technical Information
Related Web Site


Schematic / Design


Sketch Reference (like Arduino Sketch)

LYCHEE Sketch Reference

How to program

Renesas Web compiler(sketch like Arduino style on online)

Top page(log-in)

IDE for GR(sketch like Arduino style offline)

IDE for GR

Project file for e2studio

Project file for sketching in Eclipse based development environment e2studio. For downloading and installing e2studio please refer to the product page.

You can import as archive file (zip) as existing workspace from e2studio menu "File" -> "Import".

Do the menu "Project" -> "Update all dependencies" at the initial build. Only sources changed since the next build will be compiled.

Standard project (Arduino style) (mbed style)

Project with OpenCV (Arduino style, OpenCV included) (mbed style, OpenCV included)


DisplayApp is an application that displays the camera image sent by USB CDC.

For Windows

Installing the USB driver is required on versions earlier than Windows 10.

Below is an Arduino-like sketch example.