#include "stm32f4xx_hal.h" // Change to your STM32 series
#include "dht22.h"         // Include the DHT22 library header

// Define the pin connected to the DHT22 sensor
#define DHT22_PIN GPIO_PIN_1 // Change to your pin
#define DHT22_PORT GPIOB     // Change to your GPIO port

// Function prototypes
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);

// Initialize DHT22
DHT22 dht22;

int main(void)
{
    // Initialize the HAL Library
    HAL_Init();
    
    // Configure the system clock
    SystemClock_Config();
    
    // Initialize all configured peripherals
    MX_GPIO_Init();
    MX_DMA_Init();
    
    // Initialize DHT22 sensor
    dht22_init(&dht22, DHT22_PORT, DHT22_PIN);

    // Main loop
    while (1)
    {
        // Read temperature and humidity
        float temperature, humidity;
        if (dht22_read(&dht22, &temperature, &humidity))
        {
            // Success: process the data
            // Example: Toggle an LED based on the temperature
            if (temperature > 25.0)
            {
                HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5); // Toggle LED on GPIOA pin 5
            }
        }
        else
        {
            // Error: Handle the error (e.g., blink LED, print error message, etc.)
        }

        // Delay before next read
        HAL_Delay(2000);
    }
}

// Initialize all configured peripherals
static void MX_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};

    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();

    // Configure LED pin as output
    GPIO_InitStruct.Pin = GPIO_PIN_5; // Change to your LED pin
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    // Configure DHT22 data pin as input
    GPIO_InitStruct.Pin = DHT22_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_PULLUP; // or GPIO_PULLDOWN based on your circuit
    HAL_GPIO_Init(DHT22_PORT, &GPIO_InitStruct);
}

// DMA initialization function (if needed)
static void MX_DMA_Init(void)
{
    // Configure DMA settings if needed
}

// System Clock Configuration
void SystemClock_Config(void)
{
    // Configure the system clock
}