![]() ![]() What is the resolution of the ESP32 ADC pins? These pins have a resolution of 12 bits, which means you can get values from 0 to 4095. ![]() This board also provide RTC pins which can be used to trigger ESP32 from sleep mode. But if we can also map these pins to other GPIO pins also in Arduino or esp-idf. What kind of GPIO pins do I need for ESP32? By default ESP32 has two SPI communication channels VSPI and HSPI and following table provides the defaults SPI pins for both channels. ![]() Grab your ESP32 board pinout and locate the ADC pins. Only 15 are available in the DEVKIT V1 DOIT board (version with 30 GPIOs). It accepts as argument, the GPIO you want to read: The ESP32 supports measurements in 18 different channels. Recommended reading: ESP32 GPIO Reference Guide Scan I2C Address with ESP32 How to read analog input from Arduino ESP32? Reading an analog input with the ESP32 using the Arduino IDE is as simple as using the analogRead () function. FAQ about Arduino Esp32 Pinout University What are the I2C pins for Arduino ESP32? When using the ESP32 with Arduino IDE, the default I2C pins are GPIO 22 (SCL) and GPIO 21 (SDA) but you can configure your code to use any other pins. ![]()
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