// 25 & 26 DAC pinout
//https://www.upesy.com/cdn/shop/files/doc-esp32-pinout-reference-wroom-devkit.png?width=1038
#define DACPin 25
void setup() {
Serial.begin(115200);
}
void loop() {
// DAC 8-bit: max 255, min 0
int dacVal = 255;
//write value to DAC output
//255: 3.3V
//0: 0 V
//out_voltage = 3.3 * dacVal / 255
//https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/peripherals/dac.html
dacWrite(DACPin, dacVal);
Serial.printf("DAC Val: %d\n", dacVal);
delay(100);
}