ESP32 Forum

Code: Select all

#include <Arduino.h>
#include "driver/adc.h"

#define DEFAULT_VREF    1100
#define ADC_PIN A4

// Define the ADC channel and attenuation
#define ADC_CHANNEL ADC1_CHANNEL_4 // important check your pin channel, for ESP32-C6 DevkitC I have a pin 4
#define ADC_ATTEN ADC_ATTEN_DB_11

int ADC_VALUE = 0;
double voltage_value = 0.0; 

void setup() {
  Serial.begin(9600);
  pinMode(ADC_PIN, INPUT); // set the analog reference to 3.3V
  // Initialize the ADC configuration
  adc1_config_width(ADC_WIDTH_BIT_12);
  adc1_config_channel_atten(ADC_CHANNEL, ADC_ATTEN);
}

void loop() {
  do_adc();
  delay(500);
}

void do_adc() {
  sensor_reading();
  Serial.print("ADC value: ");
  Serial.println(ADC_VALUE);
  Serial.print("ADC voltage: ");
  Serial.println(voltage_value);
}


float sensor_reading() {
  ADC_VALUE = adc1_get_raw(ADC_CHANNEL);
  voltage_value = (ADC_VALUE * 3.3 );
  return voltage_value;
}

Code: Select all

#[main]
fn main() -> ! {
    let mut adc1_config = AdcConfig::new();
    let pin = adc1_config.enable_pin_with_cal::<GpioPin<4>, AdcCalBasic<ADC1>>(hw_390_pin, Attenuation::_11dB);
    let adc1 = Adc::new(peripherals.ADC1, adc1_config);
    loop {
        let out: i32 = block!(adc.read_oneshot(&mut pin)).unwrap() as i32;
        info!("read: {:?}", out);
        delay.delay_millis(500);
    }
}

Code: Select all

pub struct AdcPin<PIN, ADCI, CS = ()> {
    /// The underlying GPIO pin
    pub pin: PIN,
    /// Calibration scheme used for the configured ADC pin
    #[cfg_attr(esp32, allow(unused))]
    pub cal_scheme: CS,
    _phantom: PhantomData<ADCI>,
}