It should be noted that with a power supply voltage of 7-20 volts, the board works perfectly, and with a smaller, for example, 5 volts, there may be situations with the unstable operation. The controller provides 256KB of Flash memory for storing firmware, 8KB of SRAM, and 4KB of non-volatile EEPROM memory for data storage. The heart of the Arduino Mega platform is an 8-bit AVR family microcontroller – ATmega2560 with 16 MHz clock speed. When you type the letter a on the text window the computer sends it to the Mega then the Mega sends it to the UNO (Adafruti Metro 328) then the UNO (Adafruit Mero 328) sends it to the Leonardo to turn ON the LED on the Leonardo.To launch the platform, download and install the Arduino IDE integrated development environment on your computer.Whe you type the letter b the LED goes OFF. Open the Serial Monitor use 9600 baud speed, when you type the letter v on the text window the LED on the UNO (Adafruit Metro 328) goes ON.On the Arduino Mega UART3 code IDE make sure your Mega comm port is selected. ![]()
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