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How do identify an Arduino counterfeit?

How do I check if Arduino bootloader is installed in a AVR?

  • I am making a breadboard Arduino and require a pre-bootloaded Atmega328 as I don't have a AVR programmer. My local electronics dealer says his Atmega328 has the Arduino bootloader already installed. Is there any way to check it?

  • Answer:

    The only way you can check something like this is with the chip physically in your hands. And if it's in your hands, you might as well chalk up the breadboard Arduino, and upload a sketch to it. If the sketch works, there you go -- it has the bootloader on it. Making a Breadboard Arduino shouldn't take you more than a few minutes if you have the right parts. Follow this tutorial: http://arduino.cc/en/Tutorial/ArduinoToBreadboard

Gamin Inganela at Quora Visit the source

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Refering to your problem :--- avrdude: stk500_getsync(): Loose connection or may be bootloader not properly uploaded. The problem is probably with serial port is not able to communicate with   Arduino,I don't know about your OS so in case if its linux:                          >>> ls /dev/ttyUSB* /dev/ttyACM* in terminal to see if your device is properly connected or not. May be your linux distrbution no longer supports the definition of a com1 you need read write access to serial device file in >>> /dev/tts gpasswd -a user uucp In arduino-1.0/lib/preferences.txt  change serial.port=COM1 to serial.port=/dev/ttyACM0 and restart your system. For windows Re-install USB-serial RS232 drivers may solve some problem in case of          version issue.

Pradumn Joshi

Put an LED on pin no: 19 on the atmega328 IC(which is pin no:13 of arduino).  If the LED flash 3 times after a reset , Then bootloader is present.

Hemanth Kumar

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