AT commands through Microcontroller

Question

Dear WiFi enthosiasts, I am trying to establish a serial port connection between an mbed LPC11U24 board and the WizFi220 Evaluation Board. I have connected the tx and rx pins of the microcontroller to the rx and tx pins of the WizFi, and I attempt to send the basic ‘AT’ command at a baudrate of 115200. The writing seems to be accepted by the microcontroller, but when I use the mbed’s native readable() function (which checks whether there is something to read at the UART). The function doesn’t show the WizFi as readable, no matter what I do. Are there any basic settings or oft-made mistakes that I possibly have done? Is there any workable non-Arduino microcontroller code using the UART (or another means of communication) findable on the web? Best regards, An electronics newbie

wizdaniel · Answer

Hi. Please check the led blink when power is up. Re-write the firmware because uart firmware and spi firmware exists Independently. please check correct connection, default uart is UART0(J9) check the 2 switchs, move to [RUN], move to [CMD] on the Evaluation board.