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================
ESP32-S2-Saola-1
================
:link_to_translation:`zh_CN:[中文]`
This user guide provides information on ESP32-S2-Saola-1, a small-sized `ESP32-S2 Datasheet`_ based development board produced by Espressif.
.. figure:: ../../../_static/esp32-s2-saola-1-v1.2-isometric.png
:align: center
:alt: ESP32-S2-Saola-1
:figclass: align-center
ESP32-S2-Saola-1
The document consists of the following major sections:
- `Getting started`_: Provides an overview of the ESP32-S2-Saola-1 and hardware/software setup instructions to get started.
- `Hardware reference`_: Provides more detailed information about the ESP32-S2-Saola-1's hardware.
- `Related Documents`_: Gives links to related documentation.
Getting Started
===============
This section describes how to get started with ESP32-S2-Saola-1. It begins with a few introductory sections about the ESP32-S2-Saola-1, then Section `Start Application Development`_ provides instructions on how to get the ESP32-S2-Saola-1 ready and flash firmware into it.
Overview
--------
ESP32-S2-Saola-1 is a small-sized ESP32-S2 based development board produced by Espressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-S2-Saola-1 on a breadboard.
To cover a wide range of users' needs, ESP32-S2-Saola-1 supports:
- `ESP32-S2-WROVER <https://www.espressif.com/sites/default/files/documentation/esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf>`_
- `ESP32-S2-WROVER-I <https://www.espressif.com/sites/default/files/documentation/esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf>`_
- `ESP32-S2-WROOM <https://www.espressif.com/sites/default/files/documentation/esp32-s2-wroom_esp32-s2-wroom-i_datasheet_en.pdf>`_
- `ESP32-S2-WROOM-I <https://www.espressif.com/sites/default/files/documentation/esp32-s2-wroom_esp32-s2-wroom-i_datasheet_en.pdf>`_
In this guide, we take ESP32-S2-Saola-1 equipped with ESP32-S2-WROVER as an example.
Contents and Packaging
----------------------
Retail orders
^^^^^^^^^^^^^
If you order a few samples, each ESP32-S2-Saola-1 comes in an individual package in either antistatic bag or any packaging depending on your retailer.
For retail orders, please go to https://www.espressif.com/en/company/contact/buy-a-sample.
Wholesale Orders
^^^^^^^^^^^^^^^^
If you order in bulk, the boards come in large cardboard boxes.
For wholesale orders, please check `Espressif Product Ordering Information <https://www.espressif.com/sites/default/files/documentation/espressif_products_ordering_information_en.pdf>`_ (PDF)
Description of Components
-------------------------
.. figure:: ../../../_static/esp32-s2-saola-1-v1.2-annotated-photo.png
:align: center
:alt: ESP32-S2-Saola-1 - front/back
:figclass: align-center
ESP32-S2-Saola-1 - front
.. list-table::
:widths: 30 70
:header-rows: 1
* - Key Component
- Description
* - ESP32-S2-WROVER
- ESP32-S2-WROVER is a powerful, generic Wi-Fi MCU module that integrates ESP32-S2. It has a PCB antenna, a 4 MB external SPI flash and an additional 2 MB PSRAM.
* - I/O Connector
- All available GPIO pins (except for the SPI bus for flash and PSRAM) are broken out to the pin headers on the board. Users can program ESP32-S2 chip to enable multiple functions such as SPI, I2S, UART, I2C, touch sensors, PWM etc.
* - USB to UART Bridge
- Single USB-UART bridge chip provides transfer rates up to 3 Mbps.
* - Boot Button
- Download button. Holding down **Boot** and then pressing **Reset** initiates Firmware Download mode for downloading firmware through the serial port.
* - Reset Button
- Reset button.
* - 3.3 V Power On LED
- Turns on when the USB power is connected to the board.
* - Micro-USB Port
- USB interface. Power supply for the board as well as the communication interface between a computer and the ESP32-S2 chip.
* - RGB LED
- Addressable RGB LED (WS2812), driven by GPIO18.
Start Application Development
-----------------------------
Before powering up your ESP32-S2-Saola-1, please make sure that it is in good condition with no obvious signs of damage.
Required Hardware
^^^^^^^^^^^^^^^^^
- ESP32-S2-Saola-1
- USB 2.0 cable (Standard-A to Micro-B)
- Computer running Windows, Linux, or macOS
Software Setup
^^^^^^^^^^^^^^
Please proceed to :doc:`../../get-started/index`, where Section :ref:`get-started-step-by-step` will quickly help you set up the development environment and then flash an application example into your ESP32-S2-Saola-1.
.. note::
ESP32-S2 only supports ESP-IDF master or version v4.2 and higher.
Hardware Reference
==================
Block Diagram
-------------
A block diagram below shows the components of ESP32-S2-Saola-1 and their interconnections.
.. figure:: ../../../_static/esp32-s2-saola-1-v1.2-block-diags.png
:align: center
:scale: 70%
:alt: ESP32-S2-Saola-1 (click to enlarge)
:figclass: align-center
ESP32-S2-Saola-1 (click to enlarge)
Power Supply Options
^^^^^^^^^^^^^^^^^^^^
There are three mutually exclusive ways to provide power to the board:
- Micro USB port, default power supply
- 5V and GND header pins
- 3V3 and GND header pins
Header Block
------------
The two tables below provide the **Name** and **Function** of I/O header pins on both sides of the board. The numbering and names are the same as in the `ESP32-S2-Saola-1 Schematics`_ (PDF).
J2
^^^
=== ==== ===== ===================================
No. Name Type Function
=== ==== ===== ===================================
1 3V3 P 3.3 V power supply
2 IO0 I/O GPIO0, Boot
3 IO1 I/O GPIO1, ADC1_CH0, TOUCH_CH1
4 IO2 I/O GPIO2, ADC1_CH1, TOUCH_CH2
5 IO3 I/O GPIO3, ADC1_CH2, TOUCH_CH3
6 IO4 I/O GPIO4, ADC1_CH3, TOUCH_CH4
7 IO5 I/O GPIO5, ADC1_CH4, TOUCH_CH5
8 IO6 I/O GPIO6, ADC1_CH5, TOUCH_CH6
9 IO7 I/O GPIO7, ADC1_CH6, TOUCH_CH7
10 IO8 I/O GPIO8, ADC1_CH7, TOUCH_CH8
11 IO9 I/O GPIO9, ADC1_CH8, TOUCH_CH9
12 IO10 I/O GPIO10, ADC1_CH9, TOUCH_CH10
13 IO11 I/O GPIO11, ADC2_CH0, TOUCH_CH11
14 IO12 I/O GPIO12, ADC2_CH1, TOUCH_CH12
15 IO13 I/O GPIO13, ADC2_CH2, TOUCH_CH13
16 IO14 I/O GPIO14, ADC2_CH3, TOUCH_CH14
17 IO15 I/O GPIO15, ADC2_CH4, XTAL_32K_P
18 IO16 I/O GPIO16, ADC2_CH5, XTAL_32K_N
19 IO17 I/O GPIO17, ADC2_CH6, DAC_1
20 5V0 P 5 V power supply
21 GND G Ground
=== ==== ===== ===================================
J3
^^^
=== ==== ===== ====================================
No. Name Type Function
=== ==== ===== ====================================
1 GND G Ground
2 RST I CHIP_PU, Reset
3 IO46 I GPIO46
4 IO45 I/O GPIO45
5 IO44 I/O GPIO44, U0RXD
6 IO43 I/O GPIO43, U0TXD
7 IO42 I/O GPIO42, MTMS
8 IO41 I/O GPIO41, MTDI
9 IO40 I/O GPIO40, MTDO
10 IO39 I/O GPIO39, MTCK
11 IO38 I/O GPIO38
12 IO37 I/O GPIO37
13 IO36 I/O GPIO36
14 IO35 I/O GPIO35
16 IO34 I/O GPIO34
17 IO33 I/O GPIO33
17 IO26 I/O GPIO26
18 IO21 I/O GPIO21
19 IO20 I/O GPIO20, ADC2_CH3, USB_D+
20 IO19 I/O GPIO19, ADC2_CH3, USB_D-
21 IO18 I/O GPIO18, ADC2_CH3, DAC_2
=== ==== ===== ====================================
P: Power supply;
I: Input;
O: Output;
T: High impedance.
Pin Layout
^^^^^^^^^^^
.. figure:: ../../../_static/esp32-s2_saola1-pinout.jpg
:align: center
:scale: 45%
:alt: ESP32-S2-Saola1 (click to enlarge)
:figclass: align-center
ESP32-S2 Saola-1 Pin Layout (click to enlarge)
Related Documents
=================
* `ESP32-S2-Saola-1 Schematics`_ (PDF)
* `ESP32-S2-Saola-1 Dimensions`_ (PDF)
* `ESP32-S2 Datasheet`_ (PDF)
* `ESP32-S2-WROVER and ESP32-S2-WROVER-I Datasheet`_ (PDF)
* `ESP32-S2-WROOM and ESP32-S2-WROOM-I Datasheet`_ (PDF)
* `Espressif Product Ordering Information`_ (PDF)
For other design documentation for the board, please contact us at sales@espressif.com.
.. _ESP32-S2-Saola-1 Schematics: https://dl.espressif.com/dl/schematics/ESP32-S2-SAOLA-1_V1.1_schematics.pdf
.. _ESP32-S2-Saola-1 Dimensions: https://dl.espressif.com/dl/schematics/ESP32-S2-Saola-1_V1.2_Dimensions.pdf
.. _ESP32-S2 Datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf
.. _ESP32-S2-WROVER and ESP32-S2-WROVER-I Datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf
.. _ESP32-S2-WROOM and ESP32-S2-WROOM-I Datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-s2-wroom_esp32-s2-wroom-i_datasheet_en.pdf
.. _Espressif Product Ordering Information: https://www.espressif.com/sites/default/files/documentation/espressif_products_ordering_information_en.pdf
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