#include <stdio.h>
#include <pico/stdlib.h>
#include "hardware/adc.h"


int main() {
    stdio_init_all();

    adc_init();
    adc_select_input(4);  // Select internal temperature sensor (ADC4)

    while (true) {
        uint16_t raw = adc_read();

        // Convert ADC reading to voltage (assuming 3.3V reference)
        float voltage = raw * 3.3f / 4095.0f;

        // Convert voltage to temperature in Celsius per RP2040 datasheet
        float temperature = 27.0f - (voltage - 0.706f) / 0.001721f;

        printf("Raw ADC: %d, Voltage: %.3f V, Temperature: %.2f °C\n", raw, voltage, temperature);

        sleep_ms(1000);
    }
}