I am going to connect the Wizfi250 board to an MCU PIC 18F877A.
1 . Are the UART pins of Wizfi250 5v or 3.3v compatible? Can I connect directly the MCU to the Wzfi250 or should I have resistors as well?
2 . What about the CTS and RTS pins on the wizfi250? Should I leave them unconnected or short them?
3 . If I send data from UART or SPI what would be the form? String of data ( IN THE FORM OF “AT”) ?