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

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

void dacWrite(uint8_t pin, uint8_t value);

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

void dacDisable(uint8_t pin);