ESP32-S3-DevKitC ADC Pins Behaving Erratically

Question

I am working with a few ESP32-S3-DevKitC-1-N8 boards and have a simple program that reads analog data to the serial monitor using the two SAR ADCs (Program below). I am having a problem where the ADC channels are reading values between 50mV and 930mV when connected to nothing. As in no external circuit so the pins should be reading 0 volts. I thought it might be an issue with the board so I tried it with a few others and got the same outcome. My only other thought is that it is a problem with my program. I am coding in VSCode using the ESP-IDF 4.4 CMD to flash my code using the following commands:

idf.py set-target esp32s3

idf.py -p COM4 -b 480600 flash monitor

#include <stdio.h>
#include <driver/adc.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_spi_flash.h"
#include "esp_adc_cal.h"

void app_main(void)
{   
    printf("Hello world!\n");

  
    /* ADC Configuration and Callibration Documentation: |
    ------------------------------------------------------
        VRef of the ESP32-S3 is 1100 mV                  |
                                                         
        Right Channel: GPIO 4 ADC1 Channel 3             |
        Left Channel: GPIO 11 ADC2 Channel 0             |             

        ADC Attenuation Options:                         |
        ADC_ATTEN_DB_0   : 0 - 950 mV                    |
        ADC_ATTEN_DB_2_5 : 0 - 1250 mV                   |
        ADC_ATTEN_DB_6   : 0 - 1750 mV                   |
        ADC_ATTEN_DB_11  : 0 - 3100 mV                   |

        ADC Accuracy Options:                            |
        ADC_WIDTH_9Bit                                   |
        ADC_WIDTH_10Bit                                  |
        ADC_WIDTH_11Bit                                  |
        ADC_WIDTH_12Bit                                  |
        ADC_WIDTH_BIT_DEFAULT (Max Bit Width)            |
    -----------------------------------------------------*/

    // Configure desired precision and attenuation for ADC pins
    adc1_config_width(ADC_WIDTH_BIT_DEFAULT);
    adc1_config_channel_atten(ADC1_CHANNEL_0,ADC_ATTEN_DB_0);
    adc2_config_channel_atten(ADC2_CHANNEL_3,ADC_ATTEN_DB_0);

    // Create ADC channel characteristics structs for use in calibration functions
    
    esp_adc_cal_characteristics_t adc1_chars;
    esp_adc_cal_characteristics_t adc2_chars;
    esp_adc_cal_characterize(ADC_UNIT_1,ADC_ATTEN_DB_0,ADC_WIDTH_BIT_DEFAULT,1100,&adc1_chars);
    esp_adc_cal_characterize(ADC_UNIT_2,ADC_ATTEN_DB_0,ADC_WIDTH_BIT_DEFAULT,1100,&adc2_chars);

    int val1;
    int val2;
    int counter = 0;
    while(true){ 
        
        val1 = adc1_get_raw(ADC1_CHANNEL_0);
        adc2_get_raw(ADC2_CHANNEL_3,ADC_WIDTH_BIT_DEFAULT,&val2);

        // printf("%d, %d\n",val1,val2);
            
        int adc1_voltage = esp_adc_cal_raw_to_voltage(val1,&adc1_chars);
        int adc2_voltage = esp_adc_cal_raw_to_voltage(val2,&adc2_chars);
        printf("\n%d, %d",adc1_voltage,adc2_voltage);
        vTaskDelay(10);
        counter++;
    }
}