DAC

DAC

About

DAC (digital to analog converter) is a very common peripheral used to convert a digital signal to an analog form.

ESP32 and ESP32-S2 have two 8-bit DAC channels. The DAC driver allows these channels to be set to arbitrary voltages.

DACs can be used for generating a specific (and dynamic) reference voltage for external sensors, controlling transistors, etc.

========= ========= ========= ESP32 SoC DAC_1 pin DAC_2 pin ========= ========= ========= ESP32 GPIO 25 GPIO 26 ESP32-S2 GPIO 17 GPIO 18 ========= ========= =========

Arduino-ESP32 DAC API

dacWrite

This function is used to set the DAC value for a given pin/DAC channel.

.. code-block:: arduino

void dacWrite(uint8_t pin, uint8_t value);

• pin GPIO pin.
• value to be set. Range is 0 - 255 (equals 0 V - 3.3 V).

dacDisable

This function is used to disable DAC output on a given pin/DAC channel.

.. code-block:: arduino

void dacDisable(uint8_t pin);

• pin GPIO pin.