WiFi functionality to amazon rots based 23

Based on the Project Amazon RTOS for STM32L4, Need to take out the actual wify and add wifi functionality using ESP8266 . Doesn’t mater if use at+ commands via UART or SPI , but need the driver can be an extrcted layer to be used with other MCU Important amazon RTOS The Project is base don STM32L4 Discovery board, the final board is not the same, need assign the real pins to the final Project because the package of the IC is different than the Discovery. My budget 100$