Function

Pin connection

Device, UART-WiFi Module (Rak410)

Host, F4DISCOVERY board (STM32F407VG)

CN1 (F4 Connect v3.6)

WiFi Reset

MCU_RESET (pin 19)

PB0 (Digital output)

CN1_pin 13

WiFi Mode

MCU_MODE (pin 8)

PB1 (Digital output)

CN1_pin 14

HW flow control, CTS

UART_RTS (pin 33)

PA0 (UART2_CTS)

CN1_pin 18

HW flow control, RTS

UART_CTS (pin 34)

PA1 (UART2_RTS)

CN1_pin 22

UART Tx (Host Transmit)

UART_RX (pin 32)

PA2 (UART2_Tx)

CN1_pin 21

UART Rx (Host Receive)

UART_TX (pin 31)

PA3 (UART2_Rx)

CN1_pin 17

VCC 3.3V

VCC3V3 (pin 35)

VDD

CN1_pin 1

GND

GND

GND

CN1_pin 2