#include "driver/i2c.h"

#define SDA_PIN 21
#define SCL_PIN 22
#define I2C_PORT I2C_NUM_0

void i2c_init(void)
{
    i2c_config_t cfg = {
        .mode = I2C_MODE_MASTER,
        .sda_io_num = SDA_PIN,
        .scl_io_num = SCL_PIN,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
        .master.clk_speed = 100000
    };

    i2c_param_config(I2C_PORT, &cfg);
    i2c_driver_install(I2C_PORT, cfg.mode, 0, 0, 0);
}