Pin 16 is used as the chip select for PSRAM, and 17 is used for the clock signal. It would probably be good to note this above. You can see it on the schematics on the WROVER datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-wrover_datasheet_en.pdf

2023年9月21日 · esp32具有2个uart接口，即uart0和uart2，可提供异步通信（rs232和rs485）和irda支持，并以最高5mbps进行通信。 同样，GPIO36（VP）和GPIO39（VN）引脚也是ADC超低噪声前放大器的组成部分，这有助于配置Pre-Amp的采样时间和噪声。

If you want to set the trigger type of e.g. of GPIO16, gpio_num should be GPIO_NUM_16 (16); Enable GPIO module interrupt signal. ESP32: Please do not use the interrupt of GPIO36 and GPIO39 when using ADC or Wi-Fi and Bluetooth with sleep mode enabled.

ESP32 Enable Pin. The EN pin is the enable pin for the ESP32, pulled high by default. When pulled HIGH, the chip is enabled; when pulled LOW, the chip is disabled. The EN pin is also connected to a pushbutton switch that can pull the pin LOW and trigger a reset.

2021年12月9日 · esp32 pwm 控制器主要设计用于控制 led 的强度，但它也可用于生成其他目的的 pwm 信号。它有16个通道，可以产生独立的pwm波形。 esp32 pwm 控制器有 8 个高速通道和 8 个低速通道，我们总共有 16 个通道。它们根据速度分为两组。每组有 4 个定时器/8 个通道。

ESP32 pinout diagram and explanation of all pins with ESP32 devkit and how to use these GPIO pins? Which pin to use with step by step guide

The ESP32 chip features 34 physical GPIO pins (GPIO0 ~ GPIO19, GPIO21 ~ GPIO23, GPIO25 ~ GPIO27, and GPIO32 ~ GPIO39). Each pin can be used as a general-purpose I/O, or be connected to an internal peripheral signal.

2022年1月19日 · ESP32 has 16 independent LED PWM channels that can be configured to generate PWM signals at a resolution of 16-bit. Any output pin can be configured to produce LED PWM signals. Note: GPIO34 to 39 can not be used to …

2021年11月17日 · esp32 led pwm控制器有16个独立通道，可以配置为生成具有不同特性的pwm信号。 所有可以作为输出的管脚都可以用作PWM管脚（GPIOs 34到39不能产生PWM）。 要设置脉冲宽度调制信号，需要在代码中定义这些参数：

The ESP32 supports up to 16 independent PWM channels, and these channels can be mapped to various GPIO pins. Most GPIO pins on the ESP32 can be configured as PWM outputs, with the exception of pins that are dedicated as input-only or reserved for specific functions.