diff --git a/driver/camera.c b/driver/camera.c
index c799211..d2ac7a3 100755
--- a/driver/camera.c
+++ b/driver/camera.c
@@ -959,7 +959,7 @@ esp_err_t camera_probe(const camera_config_t* config, camera_model_t* out_camera
     camera_enable_out_clock(config);
 
     ESP_LOGD(TAG, "Initializing SSCB");
-    SCCB_Init(config->pin_sccb_sda, config->pin_sccb_scl, config->sccb_external);
+    SCCB_Init(config->pin_sscb_sda, config->pin_sscb_scl);
 	
     if(config->pin_pwdn >= 0) {
         ESP_LOGD(TAG, "Resetting camera by power down line");
@@ -968,7 +968,7 @@ esp_err_t camera_probe(const camera_config_t* config, camera_model_t* out_camera
         conf.mode = GPIO_MODE_OUTPUT;
         gpio_config(&conf);
 
-        // careful, logic is inverted compared to reset pin
+        // carefull, logic is inverted compared to reset pin
         gpio_set_level(config->pin_pwdn, 1);
         vTaskDelay(10 / portTICK_PERIOD_MS);
         gpio_set_level(config->pin_pwdn, 0);
@@ -1256,13 +1256,8 @@ esp_err_t camera_init(const camera_config_t* config)
     vsync_intr_disable();
     err = gpio_install_isr_service(ESP_INTR_FLAG_LEVEL1 | ESP_INTR_FLAG_IRAM);
     if (err != ESP_OK) {
-    	if (err != ESP_ERR_INVALID_STATE) {
-    		ESP_LOGE(TAG, "gpio_install_isr_service failed (%x)", err);
-        	goto fail;
-    	}
-    	else {
-    		ESP_LOGW(TAG, "gpio_install_isr_service already installed");
-    	}
+        ESP_LOGE(TAG, "gpio_install_isr_service failed (%x)", err);
+        goto fail;
     }
     err = gpio_isr_handler_add(s_state->config.pin_vsync, &vsync_isr, NULL);
     if (err != ESP_OK) {
diff --git a/driver/include/esp_camera.h b/driver/include/esp_camera.h
index 139cf5c..dadd0c0 100755
--- a/driver/include/esp_camera.h
+++ b/driver/include/esp_camera.h
@@ -18,8 +18,8 @@
         .pin_pwdn       = PIN_PWDN,
         .pin_reset      = PIN_RESET,
         .pin_xclk       = PIN_XCLK,
-        .pin_sccb_sda   = PIN_SIOD,
-        .pin_sccb_scl   = PIN_SIOC,
+        .pin_sscb_sda   = PIN_SIOD,
+        .pin_sscb_scl   = PIN_SIOC,
         .pin_d7         = PIN_D7,
         .pin_d6         = PIN_D6,
         .pin_d5         = PIN_D5,
@@ -81,8 +81,8 @@ typedef struct {
     int pin_pwdn;                   /*!< GPIO pin for camera power down line */
     int pin_reset;                  /*!< GPIO pin for camera reset line */
     int pin_xclk;                   /*!< GPIO pin for camera XCLK line */
-    int pin_sccb_sda;               /*!< GPIO pin for camera SDA line */
-    int pin_sccb_scl;               /*!< GPIO pin for camera SCL line */
+    int pin_sscb_sda;               /*!< GPIO pin for camera SDA line */
+    int pin_sscb_scl;               /*!< GPIO pin for camera SCL line */
     int pin_d7;                     /*!< GPIO pin for camera D7 line */
     int pin_d6;                     /*!< GPIO pin for camera D6 line */
     int pin_d5;                     /*!< GPIO pin for camera D5 line */
@@ -105,8 +105,6 @@ typedef struct {
 
     int jpeg_quality;               /*!< Quality of JPEG output. 0-63 lower means higher quality  */
     size_t fb_count;                /*!< Number of frame buffers to be allocated. If more than one, then each frame will be acquired (double speed)  */
-
-    int sccb_external;				/*!< Hardware SCCB interface configured externally */
 } camera_config_t;
 
 /**
diff --git a/driver/private_include/sccb.h b/driver/private_include/sccb.h
index 42f43e8..4d5b5b4 100755
--- a/driver/private_include/sccb.h
+++ b/driver/private_include/sccb.h
@@ -9,8 +9,8 @@
 #ifndef __SCCB_H__
 #define __SCCB_H__
 #include <stdint.h>
-int SCCB_Init(int pin_sda, int pin_scl, int external);
-uint8_t SCCB_Probe(void);
+int SCCB_Init(int pin_sda, int pin_scl);
+uint8_t SCCB_Probe();
 uint8_t SCCB_Read(uint8_t slv_addr, uint8_t reg);
 uint8_t SCCB_Write(uint8_t slv_addr, uint8_t reg, uint8_t data);
 uint8_t SCCB_Read16(uint8_t slv_addr, uint16_t reg);
diff --git a/driver/sccb.c b/driver/sccb.c
index 7254f18..0347a8f 100755
--- a/driver/sccb.c
+++ b/driver/sccb.c
@@ -19,6 +19,8 @@
 static const char* TAG = "sccb";
 #endif
 
+//#undef CONFIG_SCCB_HARDWARE_I2C
+
 #define LITTLETOBIG(x)          ((x<<8)|(x>>8))
 
 #ifdef CONFIG_SCCB_HARDWARE_I2C
@@ -41,29 +43,28 @@ static uint8_t ESP_SLAVE_ADDR   = 0x3c;
 #include "twi.h"
 #endif
 
-int SCCB_Init(int pin_sda, int pin_scl, int external)
+int SCCB_Init(int pin_sda, int pin_scl
 {
-    ESP_LOGI(TAG, "pin_sda %d pin_scl %d external %d \n", pin_sda, pin_scl, external);
+    ESP_LOGI(TAG, "pin_sda %d pin_scl %d \n", pin_sda, pin_scl);
 #ifdef CONFIG_SCCB_HARDWARE_I2C
-    if (external == 0) {
-		i2c_config_t conf;
-		conf.mode = I2C_MODE_MASTER;
-		conf.sda_io_num = pin_sda;
-		conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
-		conf.scl_io_num = pin_scl;
-		conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
-		conf.master.clk_speed = SCCB_FREQ;
+    //log_i("SCCB_Init start");
+    i2c_config_t conf;
+    conf.mode = I2C_MODE_MASTER;
+    conf.sda_io_num = pin_sda;
+    conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
+    conf.scl_io_num = pin_scl;
+    conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
+    conf.master.clk_speed = SCCB_FREQ;
 
-        i2c_param_config(SCCB_I2C_PORT, &conf);
-        i2c_driver_install(SCCB_I2C_PORT, conf.mode, 0, 0, 0);
-    }
+    i2c_param_config(SCCB_I2C_PORT, &conf);
+    i2c_driver_install(SCCB_I2C_PORT, conf.mode, 0, 0, 0);
 #else
     twi_init(pin_sda, pin_scl);
 #endif
     return 0;
 }
 
-uint8_t SCCB_Probe(void)
+uint8_t SCCB_Probe()
 {
 #ifdef CONFIG_SCCB_HARDWARE_I2C
     uint8_t slave_addr = 0x0;