DFR0282 Datasheet by DFRobot

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1 Introduction ; SQecification g PinOut 5 Tutorial ﬂ Power ﬂ Programming ﬂ Examgle Code § Trouble shooting

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BeetleSKU:DFR0282

FromRobotWiki

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Beetle

Contents

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1Introduction

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2Specification

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3PinOut

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4Tutorial

4.1Power

4.2Programming

4.3ExampleCode

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5Troubleshooting

Introduction

The “Beetle” is a minimalized version of Arduino Leonardo, and has same powerful

functionalities as Leonardo. It is ideal for DIY projects, wearable projects and etc. Its key

features are：

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20mmX22mmcompactsize

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DirectdownloadingandtestingviaMicroUSB

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V‐shapedlarge‐sizegold‐platedIOportsmakeitconvenientfortheusertotwistwiresupon,

andcanalsobedirectlysewnonclotheswithconductivethread.

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Twohoneycombshapegold‐platedpowerinterface

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MagiclightbluesoftBLINKindicator

0 e :D 05 mm xh a xx we. a mu) u 5

Beetle is fully compatible with Arduino,please select “Arduino Leonardo” when using.

Specification

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Microcontroller:ATmega32u4

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ClockSpeed:16MHz

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OperatingVoltage:5VDC

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DigitalI/OPins:10

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PWMChannels:4

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AnalogInputChannels:5

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UART:1

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I2C:1

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|MicroUSB:1

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Powerinterfaces:2

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FlashMemory:32KBofwhich4KBusedbybootloader

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SRAM:2.5KB

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EEPROM:1KB

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PhysicalDimension:20mm*22mm*3.8mm

PinOut

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Beetlefrontlook

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Beetlebacklook

 IOPortMappingincorrespondencewithArduinoPort:

Silkscreen DigitalPin PWMChannel AnalogChannel UART I2C

RX 0  

Serial1

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TX1  

SDA2  

SDA

SCL 3 3  SCL

9 9 9 A9  

1010 10 A10  

1111 11  

A0A0  A0  

A1A1  A1  

A2A2  A2  

 Powerinterfacedescription:

Silkscreen Description

+ VCC

‐ GND

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Tutorial

Power

Power supply via micro USB or power interface.

Programming

Beetle is fully compatible with Arduino Leonardo，see link for more details in connection：

http://arduino.cc/en/Guide/Windows#toc4, the only difference is to select "Arduino Leonardo "

（"tools 〉 board 〉 Arduino Leonardo" in Arduino IDE）.

ExampleCode

All codes for Arduino Leonardo can apply to Beetle.

Note:

#This product uses DC power supply with a working voltage of 5V. 6V will dama

ge the product by overvoltage. This product works reliably between

4.5V-5V; it may work under 3V-4.5V, but the reliability is not guaranteed.

#For large load applications (such as motor control), you need to connect the

loaded VCC and GND directly with power supply, and parallel with

capacitor over 10uF, in order to prevent restart or malfunction caused by lar

ge load transient.

#In Arduino environment, Beetle has the same features as Leonardo with multip

le serial ports, Serial used for USB virtual port; Serial1

used for RX/TX port.

Troubleshooting

Sometimes Leonardo Uart port will be locked by the sketch. It will lost its COM Port in Device

Manager.There is a method to wake it up.

Step1： There are 6 dots on the back of the module. This is ICSP interface. Please plug beetle to

your usb cable. And watch your device manager. Using a cable to touch Pin 5 and Pin 6, then

Beetle will reset. and Device manager should appear a COM port named "Arduino Leonardo

bootloader (COM x)". After a few seconds, it will disappear. If you see this information you

could go Step 2.

Step2: Open your arduino IDE, and open any sketch like "Blink", select the board to "Leonardo".

There is no COM port now. Just click "Upload". After IDE has completed verifying, touch the

Pin 5 and Pin 6 immediately. You need try several times, because the correct time is not easy to

be caught.

Use has been normal, after loading a new program, the computer can not find the virtual serial

Beetle?

QZO Emmy. $02 xum uu> 8:2 .ou‘

After eliminating the cable connection problems, then this question is that t

he new program is loaded affect the USB communication.

Beetle / Leonardo USB is implemented by the appropriate software (Arduino IDE

implemented),it and the user program are on the ATMEGA32U4,

If the user program affects the USB-related operations will lead to see the U

SB virtual serial port. At this time we need to reload the

available user program(such as blink).If the Beetle / Leonardo has lost cont

act with computer，it can't automatically reset,it needs

to be loaded manually reset mode，Beetle resets through a short jumper RESET

and GND of ICSP interface to achieve.

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Beetle‐ICSPinterface

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DFR0282 Datasheet by DFRobot

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