Esp32 vs arduino nano pinout1/6/2023 If you are using Arduino IDE, then the default I 2C pins are: There are two I 2C interfaces in ESP32 with complete flexibility on assigning pins i.e., SCL and SDA pins for both I 2C interfaces can be assigned in the program by the user. SPI is used to interface with Flash Memory. The ESP32 Wi-Fi chip features three SPI blocks (SPI, HSPI and VSPI) in both master and slave modes. These Touch GPIOs can be used in implementing capacitive touch pads, without any additional hardware. The ESP32 SoC has 10 capacitive-sensing GPIOs, which can detect variations in capacitance on a pin due to touching or approaching the GPIO Pin with a finger or stylus. The following two GPIO Pins are associated with DAC functionalities. The DAC has internal resistor network and uses power supply as input reference voltage. DACĮSP32 Microcontroller has two independent 8-bit Digital to Analog Converter channels to convert digital values to analog voltage signals. With 12-bit resolution, the output Digital values will be in the range of 0 – 4093. So, ADC1 and ADC2 blocks combined together have 18 channels of 12-bit ADC. ADCĮSP32 has two 12-bit SAR Analog to Digital Converter Modules with 8-channels and 10-channels each. These pins can be used to wake ESP32 from deep sleep as external wake-up source. RTC GPIOĮSP32 has 16 RTC GPIOs, which are part of the RTC Low-Power subsystem. can be assigned to any GPIO pin through program. But other functions like PWM, SPI, UART, I 2C etc. You can configure a pin as either a GPIO or an ADC or an UART in the program.ĪDC and DAC pins are predefined and you have to use the manufacturer specified pins. ESP32 has 34 GPIO pins with each pin carrying out more than one function (only one will be active). The most commonly used peripheral is the GPIO. Let us now focus on some of the important peripherals of ESP32 and their associated pins. Now that we have seen a little bit about ESP32 Pinout. Finally, you just get one extra pin (GPIO0 – Pin 23). So, they shouldn’t be used for other purposes. In the 36-Pin version, 6 GPIO pins (GPIO6 to GPIO11) are used for SPI Flash IC. Note that the pinout of both the 30-pin and the 36-pin versions of ESP32 Development Boards are very identical except for some pins at the bottom. But if you happen to have a 36-pin ESP32 board, the following pinout will be very helpful. This version is not as popular as the 30-pin version. The following image shows the pinout of a 30-pin ESP32 DevKit Development Board.Īs you can see from the image, each pin has more than one possible functionality and while using a pin for particular task, double check its alternative functions.Īnother version of ESP32 DevKit Board comes with 36-pins. It consists of ESP-WROOM-32 as the baseboard and additionally few pins and components to easily interact with ESP32. One popular ESP32 Development Board available today is the 30-pin version shown in the above image. Use this pinout of ESP-WROOM-32 module as a reference if you are using such module in your hardware design. If you notice the previous ESP-WROOM-32 image, then the Microcontroller and other components are not visible as they placed under the RF Shield. The other short edge is left for PCB Antenna. It consists of 38-pin (14 pins on each long edge and 10 on bottom short edge). The following image show the pinout of a typical ESP-WROOM-32 Module. Let us start exploring the ESP32 Pinout by taking a look at the ESP WROOM 32 Pinout.
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