ESP32-WROOM Development Board Pinout and Technical Specifications
Code name: ESP32_WROOM_DA
ESP32-WROOM development board is based on esp32 microcontroller and uses xtensa architecture. This development board has a maximum CPU frequency of 240 MHz and a flash size of 4MB.
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ESP32-WROOM Description
The ESP32-WROOM-32 is a versatile and powerful Wi-Fi + Bluetooth® + Bluetooth LE module, designed to support a wide range of applications. It is equally suitable for low-power sensor networks as well as high-demand tasks like voice encoding, music streaming, and MP3 decoding.
At the heart of the module is the ESP32-D0WDQ6 chip, engineered for scalability and adaptability. This chip features two CPU cores that can be independently controlled, with an adjustable clock frequency ranging from 80 MHz to 240 MHz. Additionally, it includes a low-power coprocessor, which is ideal for handling tasks that require minimal computing power—such as peripheral monitoring—while conserving energy.
The ESP32 integrates a rich set of peripherals, including capacitive touch sensors, an SD card interface, Ethernet, high-speed SPI, UART, I2S, and I2C. Its combination of power, flexibility, and connectivity makes the ESP32-WROOM-32 a perfect choice for a broad spectrum of IoT and embedded applications.
ESP32-WROOM Specs
Below you can find the specifications of ESP32-WROOM, such as features, connectivity options, and ESP32-WROOM technical specs.
Features
- 40 digital IO pins
- 16 external interrupt pins
- 16 analog input pins
- 19 PWM pins
Connectivity
- WiFi: 802.11 b/g/n (2.4 GHz)
- Bluetooth: 4.2
- WiFi: 4.2
Technical specs
| Clock Speed | 240 MHz |
| Flash size | 4MB |
| Microcontroller | esp32 |
| Architecture | xtensa |
ESP32-WROOM Pinout
The ESP32-WROOM pinout is designed to offer developers a highly versatile and feature-packed layout for a variety of IoT and embedded applications. The ESP32 WROOM includes essential power pins such as 5V, 3.3V, and GND, ensuring stable power delivery for external components. Key communication protocols are well-supported, with pins for UART (RXD0, TXD0), SPI (MISO, MOSI, SCK, and SS), and I2C (SDA and SCL) to interface with a wide range of peripherals.
The ESP32 WROOM Devkit also supports multiple ADC pins (IO34, IO35, IO36, etc.), making it ideal for projects that require analog input, such as reading sensor data. Additionally, specialized pins such as DAC (IO25, IO26) and Touch Pins enhance its usability in advanced applications. The inclusion of RTC GPIOs further adds low-power features, allowing developers to take full advantage of the ESP32-WROOM pinout for efficient power management.
ESP32-WROOM External Pins Mapping Functions
Below you can find the ESP32-WROOM pinout. This development board provides 40 digital IO pins, out of which 16 can be used as an external interrupt pins , 16 as analog input pins and 19 pins have Pulse-Width Modulation (PWM) .
| Pin | Function | ESP Pin | Input/Output | Description |
|---|---|---|---|---|
| 1 | SENSOR_VP | GPIO36 | input | ADC1_CH0, RTC_GPIO0 |
| 2 | SENSOR_VN | GPIO39 | input | ADC1_CH3, RTC_GPIO3 |
| 3 | IO34 | GPIO34 | input | ADC1_CH6, RTC_GPIO4 |
| 4 | IO35 | GPIO35 | input | ADC1_CH7, RTC_GPIO5 |
| 5 | IO32 | GPIO32 | bidirectional | XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9 |
| 6 | IO33 | GPIO33 | bidirectional | XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8 |
| 7 | IO25 | GPIO25 | bidirectional | DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0 |
| 8 | IO26 | GPIO26 | bidirectional | DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1 |
| 9 | IO27 | GPIO27 | bidirectional | ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV |
| 10 | IO14 | GPIO14 | bidirectional | ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2 |
| 11 | IO12 | GPIO12 | bidirectional | ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3 |
| 12 | GND | N/A | power ground | Ground connection |
| 13 | IO13 | GPIO13 | bidirectional | ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER |
| 14 | SHD/SD2 | GPIO9 | bidirectional | SD_DATA2, SPIHD, HS1_DATA2, U1RXD |
| 15 | SWP/SD3 | GPIO10 | bidirectional | SD_DATA3, SPIWP, HS1_DATA3, U1TXD |
| 16 | SCS/CMD | GPIO11 | bidirectional | SD_CMD, SPICS0, HS1_CMD, U1RTS |
| 17 | SCK/CLK | GPIO6 | bidirectional | SD_CLK, SPICLK, HS1_CLK, U1CTS |
| 18 | SDO/SD0 | GPIO7 | bidirectional | SD_DATA0, SPIQ, HS1_DATA0, U2RTS |
| 19 | SDI/SD1 | GPIO8 | bidirectional | SD_DATA1, SPID, HS1_DATA1, U2CTS |
| 20 | IO15 | GPIO15 | bidirectional | ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD, EMAC_RXD3 |
| 21 | IO2 | GPIO2 | bidirectional | ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0 |
| 22 | IO0 | GPIO0 | bidirectional | ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK |
| 23 | IO4 | GPIO4 | bidirectional | ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER |
| 24 | IO16 | GPIO16 | bidirectional | HS1_DATA4, U2RXD, EMAC_CLK_OUT |
| 25 | IO17 | GPIO17 | bidirectional | HS1_DATA5, U2TXD, EMAC_CLK_OUT_180 |
| 26 | IO5 | GPIO5 | bidirectional | VSPICS0, HS1_DATA6, EMAC_RX_CLK |
| 27 | IO18 | GPIO18 | bidirectional | VSPICLK, HS1_DATA7 |
| 28 | IO19 | GPIO19 | bidirectional | VSPIQ, U0CTS, EMAC_TXD0 |
| 29 | NC | N/A | not connected | No connection |
| 30 | IO21 | GPIO21 | bidirectional | VSPIHD, EMAC_TX_EN |
| 31 | RXD0 | GPIO3 | bidirectional | U0RXD, CLK_OUT2 |
| 32 | TXD0 | GPIO1 | bidirectional | U0TXD, CLK_OUT3, EMAC_RXD2 |
| 33 | IO22 | GPIO22 | bidirectional | VSPIWP, U0RTS, EMAC_TXD1 |
| 34 | IO23 | GPIO23 | bidirectional | VSPID, HS1_STROBE |
| 35 | GND | N/A | power ground | Ground connection |
ESP32-WROOM Pins Mapping Arduino IDE
Below you can find the ESP32-WROOM pinout. This development board provides 40 digital IO pins, out of which 16 can be used as an external interrupt pins , 16 as analog input pins and 19 pins have Pulse-Width Modulation (PWM) .
| Pin | Analog | Touch | PWM | Other |
|---|---|---|---|---|
| 0 | A11 | T1 | ||
| 1 | PWM | TX | ||
| 2 | A12 | T2 | PWM | ANT1 |
| 3 | PWM | RX | ||
| 4 | A10 | T0 | PWM | |
| 5 | PWM | SS | ||
| 12 | A15 | T5 | PWM | |
| 13 | A14 | T4 | PWM | |
| 14 | A16 | T6 | PWM | |
| 15 | A13 | T3 | PWM | |
| 18 | PWM | SCK | ||
| 19 | PWM | MISO | ||
| 21 | PWM | SDA | ||
| 22 | PWM | SCL | ||
| 23 | PWM | MOSI | ||
| 25 | A18 | PWM | DAC1 ANT2 | |
| 26 | A19 | PWM | DAC2 | |
| 27 | A17 | T7 | PWM | |
| 32 | A4 | T9 | PWM | |
| 33 | A5 | T8 | PWM | |
| 34 | A6 | |||
| 35 | A7 | |||
| 36 | A0 | |||
| 39 | A3 |
Default Tools
| Bootloader tool | esptool_py |
| Uploader tool | esptool_py |
| Network uploader tool | esp_ota |
| Bootloader address | 0x1000 |
| Flash mode | dio |
| Boot mode | dio |
| PSRAM type | |
| Maximum upload size | 1280 Kb (1310720 B) |
| Maximum data size | 320 Kb (327680 B) |
The ESP32-WROOM development board by default uses esptool_py uploader tool, esp_ota network uploader tool for Over-the-air (OTA) uploads and esptool_py bootloader tool. The bootloader starts at address "0x1000". Flash mode and boot mode for ESP32-WROOM development board by default is dio and dio respectively.
