Arduino Nano ESP32 DAC pin

Projects General Guidance
1

I bought Arduino Nano ESP32 today and I have check the manual for the DAC pin. I couldn't find it. I would appreciate any response.

the task I have is :slight_smile:

I have an analog sensor connected to the ADC pin and I want to feed the digital output of the ADC to the DAC pin.

2
3

Thanks but there is no Arduino Nano ESP32 on the attached file

4

This is the link to the documentation but I can find the DAC pin.
https://docs.arduino.cc/tutorials/nano-esp32/cheat-sheet/

5

There is no "DAC".
There is I2S.

6

It seems that GPIO25,26 are not exposed to the user on the Arduino Nano ESP32.
Leo..

7

looking at Comparison table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6 the ESP32-S3 column has ? against the DAC

8

Of course it shows as there is a DAC in the comparison link you provided BUT… as Wawa mentioned

Use I2S as @runaway_pancake mentioned

9

Yes! The following digrams validate the above comment.

image
image890×890 61.8 KB

esp32-30Pin-Pic
esp32-30Pin-Pic1227×606 88.7 KB

Any idea why is the following sketch not being compiled in Nano ESP32; but, it is compiled in ESP32 classic? (dacWrite() is not recognied under Nano ESP32)

#include <esp32-hal-dac.h>
#define DAC1 12  //an attempt to route the DAC1's output on DPin-12 of NanoESP32

void setup()
{
  Serial.begin(115200);

}

void loop()
{ // Generate a Sine wave
  // int Value = 255; //255= 3.3V 128=1.65V
  for (int i = 0; i < 255; i = i + 10)
  {
    dacWrite(DAC1, i);

    delay(1000);
  }
}
10

It's not a matter of re-mapping.
"DAC1 /2" seem misnomers anyway (those are the I2S pins).

11

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