#include <Arduino.h>

#define DAC_CH1 25

void dac_set(uint8_t dac_value=0);

void dac_set(uint8_t dac_value){
  Serial.print("DAC = ");
  Serial.println(dac_value);
  dacWrite(DAC_CH1, dac_value);
  delay(3500);
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("DAC DEMO");
}

void loop() {
  dac_set(0);
  dac_set(32);
  dac_set(64);
  dac_set(128);
  dac_set(255);
}