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The Server made with STM32 with ESP8266 is refusing to connect


hi im making a project to detact rain and sunlight to give decision to close the curtain refusing the user to change the value of the curtain closed. i am currently using NUCLEO-F411RE board with NodeMCU v3 using the NodeMCU just as middle man to connect them into my home wifi. Currently, the problem is everything seems working fine until securing the connection between STM and wifi router, but when i use my phone or laptop to get connection to the webpage that STM builds, ERR_CONNECTION_REFUSED occurs. I have tested that both board is working fine, i have disconnected all the sensors as i am just testing on the wireless connection. I have attached the main.c file the ESP8266 file and the ringbuffer file so that it might be easier for me to get some help