diff --git a/part4_inputs_outputs/lab4_app_photoresisor/main/main.c b/part4_inputs_outputs/lab4_app_photoresisor/main/main.c
index 283d43c..1def524 100644
--- a/part4_inputs_outputs/lab4_app_photoresisor/main/main.c
+++ b/part4_inputs_outputs/lab4_app_photoresisor/main/main.c
@@ -179,7 +179,7 @@ void vScanTask(void *pvParameters){
 
 	adc_chars = calloc(1, sizeof(esp_adc_cal_characteristics_t));
     esp_adc_cal_value_t val_type = esp_adc_cal_characterize(unit, atten, width, DEFAULT_VREF, adc_chars);
-    
+    char text[100];
 
 	uint16_t measuredValues;
 	int v;
@@ -195,9 +195,9 @@ void vScanTask(void *pvParameters){
 		
 		printf("V = %d mV\n", measuredValues);
 
-// Send message 
-char text[100];
-sprintf(text, "%d\r\n", measuredValues);
+        // Send message 
+
+        sprintf(text, "%d\n", measuredValues);
 
  // Write data back to the UART
  		int length = uart_write_bytes(UART_PORT_NUM, (const char *) text, strlen(text));
@@ -239,12 +239,13 @@ void vUpdateLedTask(void *pvParameters) {
 
                     /* duty cycle according to the color LED */
                     if (strncmp(WHITE_LED_CMD, data, cmp_length) == 0) {
-                        
-
+                    ledc_set_duty_and_update(LEDC_LOW_SPEED_MODE,LEDC_CHANNEL_1,0,0);  
+                    ledc_set_duty_and_update(LEDC_LOW_SPEED_MODE,LEDC_CHANNEL_0,1024,0);  
 
                     }
                     else if (strncmp(BLUE_LED_CMD, data, cmp_length) == 0) {
-                        
+                    ledc_set_duty_and_update(LEDC_LOW_SPEED_MODE,LEDC_CHANNEL_1,1024,0);
+                    ledc_set_duty_and_update(LEDC_LOW_SPEED_MODE,LEDC_CHANNEL_0,0,0);   
 
 
                     }