ESP32 WiFi & Bluetooth Development Board
Model(s): ESP32
OEM/Integrators Installations User Manual
Introduction for OEMs and Integrators
This module is intended for OEM installation only. It is designed to be mounted inside an end product by professional installers. The power and control signal settings are managed by the end product's software, and the end user cannot alter these settings.
OEM Integrator Conditions
This device is intended for OEM integrators under the following specific conditions:
- The antenna must be installed such that a minimum distance of 20cm is maintained between the antenna and users. The antenna is a PCB printed antenna with a gain of 2.0dBi.
- The transmitter module must not be co-located with any other transmitter or antenna.
Adherence to these conditions may exempt the integrator from further transmitter testing. However, the integrator remains responsible for testing their end-product for any additional compliance requirements with the module installed.
OEM integrators must not provide end users with information on how to install or remove this RF module. The end user manual for the final product must include all required regulatory information and warnings as presented in this document.
If the FCC identification number is not visible when the module is installed inside another device, the exterior of the host device must display a label referring to the enclosed module, such as: "Contains FCC ID: 2A4RQ-ESP32".
When the module is installed inside another device, the user manual of that device must include the following warning statement:
Federal Communication Commission Interference Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with the instructions, it may cause harmful interference to radio communications. There is no guarantee that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception (which can be determined by turning the equipment off and on), the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. It should be installed and operated with a minimum distance of 20cm between the radiator and your body.
Caution
Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations.
Installation
Download Mode: Directly download code after connecting to the computer via a USB cable. Note: The baud rate cannot be selected as 1152000.
Run Mode: Press the EN key on the development board; the board will then enter run mode.
ESP32 Pin Descriptions
| Pin No. | Pin Name | Pin Description |
|---|---|---|
| 1 | 3.3V | Power Supply |
| 2 | EN | Enable module, active high |
| 3 | SVP | GPIO36, ADC1_CH0, RTC_GPIO0 |
| 4 | SVN | GPIO39, ADC1_CH3, RTC_GPIO3 |
| 5 | P34 | GPIO34, ADC1_CH6, RTC_GPIO4 |
| 6 | P35 | GPIO35, ADC1_CH7, RTC_GPIO5 |
| 7 | P32 | GPIO32, XTAL_32K_P (32.768 kHz Crystals input), ADC1_CH4, TOUCH9, RTC_GPIO9 |
| 8 | P33 | GPIO33, XTAL_32K_N (32.768 kHz Crystals output), ADC1_CH5, TOUCH8, RTC_GPIO8 |
| 9 | P25 | GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0 |
| 10 | P26 | GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RX_DV |
| 11 | P27 | GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV |
| 12 | P14 | GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2 |
| 13 | P12 | GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3 |
| 14 | GND | Ground |
| 15 | P13 | GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER |
| 16 | SD2 | GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD |
| 17 | SD3 | GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD |
| 18 | CMD | GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS |
| 19 | 5V | Power Supply |
| 20 | CLK | GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS |
| 21 | SD0 | GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS |
| 22 | SD1 | GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS |
| 23 | P15 | GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD, EMAC_RXD3 |
| 24 | P2 | GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0 |
| 25 | P0 | GPIO0, ADC2_CH1, TOUCH1, CLK_OUT1, RTC_GPIO11, EMAC_TX_CLK; Download mode: external pull down; Operation mode: suspension or external pull up |
| 26 | P4 | GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER |
| 27 | P16 | GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT |
| 28 | P17 | GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180 |
| 29 | P5 | GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK |
| 30 | P18 | GPIO18, VSPICLK, HS1_DATA7 |
| 31 | P19 | GPIO19, VSPIQ, U0CTS, EMAC_TXD0 |
| 32 | GND | Ground |
| 33 | P21 | GPIO21, VSPIHD, EMAC_TX_EN |
| 34 | RX | GPIO3, U0RXD, CLK_OUT2 |
| 35 | TX | GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2 |
| 36 | P22 | GPIO22, VSPIWP, U0RTS, EMAC_TXD1 |
| 37 | P23 | GPIO23, VSPID, HS1_STROBE |
| 38 | GND | Ground |
Module Visuals and Dimensions
ESP32 Bottom View: Shows the layout of pins and components on the underside of the development board.
ESP32 Top View: Displays the main ESP32 module, Wi-Fi/Bluetooth antenna area, and various components on the top side of the board. Key markings include "CE ESP32 Wi-Fi+BT+BLE MCU IEEE 802.11b/g/n".
Outline Dimensions:
- Length: 48.26mm
- Width: 25.4mm
- Height (including header pins): 12mm
- Pin header height: 5mm
