ICSP = In Circuit Serial Programming. Another way of programming it if the bootloader isn't there.
You can get multiple Arduinos to talk together using I2C by connecting together the SDA/SCL pins (A4/A5) (plus ground) and using suitable programs.
ICSP = In Circuit Serial Programming. Another way of programming it if the bootloader isn't there.
You can get multiple Arduinos to talk together using I2C by connecting together the SDA/SCL pins (A4/A5) (plus ground) and using suitable programs.