On Rev2 or later boards: there is a resistor that pulling the 8U2/16U2 HWB line to ground, making it easier to put into DFU mode. On Rev1 boards: connecting the solder jumper on the back of the board (near the map of Italy) and then resetting the 8U2.The ATmega16U2/8U2 is loaded with a DFU bootloader, which can be activated by: The ATmega16U2 (or 8U2 in the rev1 and rev2 boards) firmware source code is available in the Arduino repository. You can also bypass the bootloader and program the microcontroller through the ICSP (In-Circuit Serial Programming) header using Arduino ISP or similar see these instructions for details. It communicates using the original STK500 protocol ( reference, C header files). The ATmega2560 on the Mega 2560 comes preprogrammed with a bootloader that allows you to upload new code to it without the use of an external hardware programmer. For details, see the reference and tutorials. The Mega 2560 board can be programmed with the Arduino Software (IDE). You can find here your board warranty information. Need any help with your board please get in touch with the official Arduino User Support as explained in our Contact Us page. Need Help?Ĭheck the Arduino Forum for questions about the Arduino Language, or how to make your own Projects with Arduino. You can find in the Getting Started with Arduino MEGA2560 Rev 3 section all the information you need to configure your board, use the Arduino Software (IDE), and start tinkering with coding and electronics.įrom the Tutorials section you can find examples from libraries and built-in sketches as well other useful information to expand your knowledge of the Arduino hardware and software. If you are looking at upgrading from previous Arduino designs, or if you are just interested in boards with similar functionality, at Arduino you can find:įind inspiration for your projects with the Mega 2560 board from our tutorial platform Project Hub. The Mega 2560 is an update to the Arduino Mega, which it replaces. The Mega 2560 board is compatible with most shields designed for the Uno and the former boards Duemilanove or Diecimila. It contains everything needed to support the microcontroller simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. My understanding of change interrupts are that when a detected change occurs it is then prioritized above other tasks to allow for immediate execution.The Arduino Mega 2560 is a microcontroller board based on the ATmega2560.So i defined RX as 50 & TX as 49 and it now seems to be working fine. After some investigating i came across this on one of the Arduino pages on SoftwareSerial: it could transmit data to Mega 2 just fine. However after i tried to do this the Mega 1 couldn't receive data from Mega 2. I used the SoftwareSerial Library to define my pins for communicating to Mega 2. My initial plan was to keep Mega 1's pins 0/TX0 & 1/RX0 free for my pc, and then use any of two pairs of RX/TX pins from 14-19 labelled as communication for connecting with Mega 2. I want to be able to keep communication open with my computer via usb while also communicating with another Mega 2560.įor clarification, I'll refer to the Arduino Mega connected to both my pc & the other Arduino as: Mega 1, and the other Mega 2. Hi, so I'm using Mega 2560 and I'm wondering about which pins i should be using for serial communication and why.
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