As the name suggests the CANADUINO MEGA 2560 PLC 500 is based on an Arduino MEGA 2560 compatible ... RS232 serial port for HMI or other devices, ESP8266 based Wi-Fi and I2C bus for sensors or ...

“he new CANADUINO MEGA 2560 PLC 500 is based on an Arduino MEGA 2560 compatible computing ... 2 x RS232 serial port for HMI or other devices, ESP8266 based Wi-Fi and I2C bus for sensors or ...

It’s a significant update. The Arduino UNO and Arduino Mega 2560 update the Duemilanove and Mega respectively. They now use an ATMega8U2 instead of an FTDI USB to serial converter chip.

Meanwhile, the Arduino Mega is getting the same USB chip along with an ATMega2560 processor with twice the memory. Right now only 128K is available, but that's a software limitation and they're ...