DFR0282

  Beetle SKU:DFR0282 From Robot Wiki      Beetle  Contents      1 Introduction  2 Specification  3 PinOut  4 Tutorial   o 4.1 Power  o 4.2 Programming  o 4.3 Example Code  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：      20mm X 22mm compact size  Direct downloading and testing via Micro USB  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.  Two honeycomb shape gold‐plated power interface  Magic light blue soft BLINK indicator  Beetle is fully compatible with Arduino,please select “Arduino Leonardo” when using. Specification               Microcontroller: ATmega32u4  Clock Speed: 16 MHz  Operating Voltage: 5V DC  Digital I/O Pins: 10  PWM Channels: 4  Analog Input Channels:5  UART: 1  I2C: 1  |Micro USB: 1  Power interfaces: 2  Flash Memory: 32 KB of which 4KB used by bootloader  SRAM: 2.5 KB   EEPROM: 1 KB   Physical Dimension: 20mm*22mm*3.8mm  PinOut                 Beetle front look  Beetle back look   IO Port Mapping in correspondence with Arduino Port:  Silkscreen   Digital Pin   PWM Channel   Analog Channel   RX   0       UART   I2C     Serial1    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   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? 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 and GND of ICSP interface to achieve.   Beetle‐ICSP interface  More question and cool idea,visit DFRobot Forum   Powered By DFRobot © 2008-2017 RESET