ESPRESSIF SYSTEMS ESP32WROVER Wi-Fi & Bluetooth Module User Manual ESP32 WROVER User Guide pages

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Document ID	3428072
Application ID	8CydzRosTo0ttP5fS3NJ7Q==
Document Description	Users Manual
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	22.01kB (275150 bits)
Date Submitted	2017-06-15 00:00:00
Date Available	2017-06-15 00:00:00
Creation Date	2017-05-27 01:51:46
Producing Software	Mac OS X 10.12.4 Quartz PDFContext
Document Lastmod	2017-06-15 13:29:28
Document Title	ESP32-WROVER_User_Guide.pages
Document Creator	Pages

ESP32-WROVER
User Guide
Version 1.0
Copyright Š 2017
About This Guide
This document is intended to help users set up the basic software development
environment for developing applications using hardware based on the ESP32-WROVER.
Through a simple example, this document illustrates how to use ESP-IDF (Espressif IoT
Development Framework), including the menu based configuration wizard, compiling the
ESP-IDF and firmware download to the ESP32 module.
The document is structured as follows.
Release Notes
Date
Version
Release notes
2017.05
V1.0
First release.
Table of Contents
1. Introduction............................................................................................................................. 1
1.1. ESP32 ........................................................................................................................................1
1.2. ESP-IDF .....................................................................................................................................1
1.3. Preparing the Hardware .............................................................................................................1
2. Getting Started ....................................................................................................................... 2
2.1. Standard Setup of Toolchain for Linux .......................................................................................2
2.1.1.
Install Prerequisites .......................................................................................................2
2.1.2.
Toolchain Setup ............................................................................................................2
2.2. Get ESP-IDF ...............................................................................................................................3
2.3. Set up Path to ESP-IDF .............................................................................................................3
3. Start a Project .........................................................................................................................4
4. Configuration .......................................................................................................................... 5
5. Build and Flash ....................................................................................................................... 6
5.1. Build and Flash ..........................................................................................................................6
5.2. Monitor .......................................................................................................................................7
6. SSC Command Reference .....................................................................................................8
6.1. op ...............................................................................................................................................8
6.2. sta ..............................................................................................................................................8
6.3. ap ...............................................................................................................................................9
6.4. mac ............................................................................................................................................9
6.5. dhcp .........................................................................................................................................10
6.6. ip ..............................................................................................................................................10
6.7. reboot .......................................................................................................................................11
6.8. ram ...........................................................................................................................................11
1. Introduction
1.
Introduction
1.1. ESP32
ESP32 integrates Wi-Fi (2.4 GHz band) and Bluetooth 4.2 solutions on a single chip, along
with dual high performance cores and many other versatile peripherals. Powered by 40 nm
technology, ESP32 provides a robust, highly integrated platform to meet the continuous
demands for efficient power usage, compact design, security, high performance, and
reliability.
Espressif provides the basic hardware and software resources that empowers application
developers to build their ideas around the ESP32 series hardware. The software
development framework provided by Espressif is intended for rapidly developing Internetof-Things (IoT) applications, with Wi-Fi, Bluetooth, flexible power management and other
advanced system features.
The RF frequency range is 2.412-2.462 GHz(Wi-Fi)/2.402-2.480GHz (Bluetooth/
BLE). The maximum RF transmit power is 23 dBm.
The manufacturer is Espressif Systems (Shanghai) Pte., Ltd, which is shown at the bottom
of the product.
1.2. ESP-IDF
The Espressif IoT Development Framework (ESP-IDF for short) is a framework for
developing applications based on the Espressif ESP32. Users can develop applications in
Windows/Linux/MacOS based on ESP-IDF. It is recommended to use Linux distribution.
Lubuntu 16.04 has been used as an example in this document for illustration purposes.
1.3. Preparing the Hardware
• 1 x ESP32-WROVER
• 1 x USB-to-TTL serial cable or a Micro-USB cable.
Espressif
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2. Getting Started
2.
Getting Started
2.1. Standard Setup of Toolchain for Linux
Depending on your experience and preferences, you may follow standard installation
process or customize your environment. Instructions immediately below are for standard
installation. To set up the system your own way go to section Customized Setup of
Toolchain.
2.1.1. Install Prerequisites
To compile with ESP-IDF you need to get the following packages:
• CentOS 7:
sudo yum install git wget make ncurses-devel flex bison gperf python pyserial
• Ubuntu and Debian:
sudo apt-get install git wget make libncurses-dev flex bison gperf python python-serial
• Arch:
sudo pacman -S --needed gcc git make ncurses flex bison gperf python2-pyserial
2.1.2. Toolchain Setup
ESP32 toolchain for Linux is available for download from Espressif website:
• for 64-bit Linux:
https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-61-gab8375a-5.2.0.tar.gz
• for 32-bit Linux:
https://dl.espressif.com/dl/xtensa-esp32-elf-linux32-1.22.0-61-gab8375a-5.2.0.tar.gz
Download this file, then extract it in ~/esp directory
mkdir -p ~/esp
cd ~/esp
tar -xzf ~/Downloads/xtensa-esp32-elf-linux64-1.22.0-61-gab8375a-5.2.0.tar.gz
The toolchain will be extracted into ~/esp/xtensa-esp32-elf/ directory.
To use it, you will need to update your ``PATH`` environment variable in ~/.bash_profile file.
To make xtensa-esp32-elf` available for all terminal sessions, add the following line to your
~/.bash_profile file:
export PATH=$PATH:$HOME/esp/xtensa-esp32-elf/bin
Alternatively, you may create an alias for the above command. This way you can get the
toolchain only when you need it. To do this, add different line to your ~/.bash_profile file:
Espressif
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2. Getting Started
alias get_esp32="export PATH=$PATH:$HOME/esp/xtensa-esp32-elf/bin"
Then when you need the toolchain you can type get_esp32 on the command line and the
toolchain will be added to your PATH.
2.2. Get ESP-IDF
Once you have the toolchain (that contains programs to compile and build the application)
installed, you also need ESP32 specific API / libraries. They are provided by Espressif in
ESP-IDF repository. To get it, open terminal, navigate to the directory you want to put ESPIDF, and clone it using git clone command:
cd ~/esp
git clone --recursive https://github.com/espressif/esp-idf.git
ESP-IDF will be downloaded into ~/esp/esp-idf.
📖 Note:
Do not miss the --recursive option. If you have already cloned ESP-IDF without this option, run another
command to get all the submodules:
cd ~/esp/esp-idf
git submodule update --init
2.3. Set up Path to ESP-IDF
The toolchain programs access ESP-IDF using IDF_PATH environment variable. This
variable should be set up on your PC, otherwise projects will not build. Setting may be
done manually, each time PC is restarted. Another option is to set up it permanently by
defining IDF_PATH in user profile.
Set up IDF_PATH by adding the following line to ~/.bash file:
export IDF_PATH=~/esp/esp-idf
Log off and log in back to make this change effective.
If you do not like to have IDF_PATH set up permanently, you should enter it manually in
terminal window on each restart or logout.
Run the following command to check if IDF_PATH is set:
printenv IDF_PATH
The path previously entered in ~/.bash file (or set manually) should be printed out.
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3. Start a Project
3.
Start a Project
Now you are ready to prepare your application for ESP32. To start off quickly, we will use
get-started/hello_world project from examples directory in IDF.
Copy get-started/hello_world to ~/esp directory:
cd ~/esp
cp -r $IDF_PATH/examples/get-started/hello_world .
You can also find a range of example projects under the examples directory in ESP-IDF.
These example project directories can be copied in the same way as presented above, to
begin your own projects.
📖 Note:
The ESP-IDF build system does not support spaces in paths to ESP-IDF or to projects.
Espressif
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4. Configuration
4.
Configuration
You are almost there. To be able to proceed further, connect ESP32-WROVER to PC,
check under what serial port the board is visible and verify if serial communication works.
Being in terminal window, go to directory of hello_world application by typing cd ~/esp/
hello_world. Then start project configuration utility menuconfig:
cd ~/esp/hello_world
make menuconfig
If previous steps have been done correctly, the following menu will be displayed:
In the menu, navigate to Serial flasher config > Default serial port to configure the serial
port, where project will be loaded to. Confirm selection by pressing enter, save
configuration by selecting < Save > and then exit application by selecting < Exit >.
Here are couple of tips on navigation and use of menuconfig:
• Use up & down arrow keys to navigate the menu.
• Use Enter key to go into a submenu, Escape key to go out or to exit.
• Type ? to see a help screen. Enter key exits the help screen.
• Use Space key, or Y and N keys to enable (Yes) and disable (No) configuration items
with checkboxes “[*]“.
• Pressing ? while highlighting a configuration item displays help about that item.
• Type / to search the configuration items.
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5. Build and Flash
5.
Build and Flash
5.1. Build and Flash
Now you can build and flash the application. Run:
make flash
This will compile the application and all the ESP-IDF components, generate bootloader,
partition table, and application binaries, and flash these binaries to your ESP32 board.
esptool.py v2.0-beta2
Flashing binaries to serial port /dev/ttyUSB0 (app at offset 0x10000)...
esptool.py v2.0-beta2
Connecting........___
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Attaching SPI flash...
Configuring flash size...
Auto-detected Flash size: 4MB
Flash params set to 0x0220
Compressed 11616 bytes to 6695...
Wrote 11616 bytes (6695 compressed) at 0x00001000 in 0.1 seconds (effective 920.5 kbit/s)...
Hash of data verified.
Compressed 408096 bytes to 171625...
Wrote 408096 bytes (171625 compressed) at 0x00010000 in 3.9 seconds (effective 847.3 kbit/
s)...
Hash of data verified.
Compressed 3072 bytes to 82...
Wrote 3072 bytes (82 compressed) at 0x00008000 in 0.0 seconds (effective 8297.4 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting...
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5. Build and Flash
If there are no issues, at the end of build process, you should see messages describing
progress of loading process. Finally, the end module will be reset and “hello_world”
application will start.
5.2. Monitor
To see if “hello_world” application is indeed running, type make monitor. This command is
launching IDF Monitor application:
$ make monitor
MONITOR
--- idf_monitor on /dev/ttyUSB0 115200 ----- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H --ets Jun
8 2016 00:22:57
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
ets Jun
8 2016 00:22:57
...
Several lines below, after start up and diagnostic log, you should see “Hello world!” printed
out by the application.
...
Hello world!
Restarting in 10 seconds...
I (211) cpu_start: Starting scheduler on APP CPU.
Restarting in 9 seconds...
Restarting in 8 seconds...
Restarting in 7 seconds...
To exit monitor use shortcut Ctrl+]. To execute make flash and make monitor in one shoot
type make flash monitor.
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6. SSC Command Reference
6.
SSC Command Reference
Here lists some common Wi-Fi commands for you to test the module.
6.1. op
Description
op commands are used to set and query the Wi-Fi mode of the system.
Example
op -Q
op -S -o wmode
Parameter
Table 6-1. op Command Parameter
Parameter
Description
-Q
Query Wi-Fi mode.
-S
Set Wi-Fi mode.
There are 3 Wi-Fi modes:
wmode
• mode = 1: STA mode
• mode = 2: AP mode
• mode = 3: STA+AP mode
6.2. sta
Description
sta commands are used to scan the STA network interface, connect or disconnect AP, and
query the connecting status of STA network interface.
Example
sta -S [-s ssid] [-b bssid] [-n channel] [-h]
sta -Q
sta -C [-s ssid] [-p password]
sta -D
Parameter
Table 6-2. sta Command Parameter
Espressif
Parameter
Description
-S scan
Scan Access Points.
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6. SSC Command Reference
Parameter
Description
-s ssid
Scan or connect Access Points with the ssid.
-b bssid
Scan the Access Points with the bssid.
-n channel
Scan the channel.
-h
Show scan results with hidden ssid Access Points.
-Q
Show STA connect stutus.
-D
Disconnected with current Access Points.
6.3. ap
Description
ap commands are used to set the parameter of AP network interface.
Example
ap -S [-s ssid] [-p password] [-t encrypt] [-n channel] [-h] [-m max_sta]
ap –Q
ap –L
Parameter
Table 6-3. ap Command Parameter
Parameter
Description
-S
Set AP mode.
-s ssid
Set AP ssid.
-p password
Set AP password.
-t encrypt
Set AP encrypt mode.
-h
Hide ssid.
-m max_sta
Set AP max connections.
-Q
Show AP parameters.
-L
Show MAC Address and IP Address of the connected station.
6.4. mac
Description
mac commands are used to query the MAC address of the network interface.
Example
mac -Q [-o mode]
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6. SSC Command Reference
Parameter
Table 6-4. mac Command Parameter
Parameter
Description
-Q
Show MAC address.
-o mode
• mode = 1: MAC address in STA mode.
• mode = 2: MAC address in AP mode.
6.5. dhcp
Description
dhcp commands are used to enable or disable dhcp server/client.
Example
dchp -S [-o mode]
dhcp -E [-o mode]
dhcp -Q [-o mode]
Parameter
Table 6-5. dhcp Command Parameter
Parameter
Description
-S
Start DHCP (Client/Server).
-E
End DHCP (Client/Server).
-Q
show DHCP status.
-o mode
• mode = 1 : DHCP client of STA interface.
• mode = 2 : DHCP server of AP interface.
• mode = 3 : both.
6.6. ip
Description
ip command are used to set and query the IP address of the network interface.
Example
ip -Q [-o mode]
ip -S [-i ip] [-o mode] [-m mask] [-g gateway]
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6. SSC Command Reference
Parameter
Table 6-6. ip Command Parameter
Parameter
Description
-Q
Show IP address.
-o mode
• mode = 1 : IP address of interface STA.
• mode = 2 : IP address of interface AP.
• mode = 3 : both
-S
Set IP address.
-i ip
IP address.
-m mask
Subnet address mask.
-g gateway
Default gateway.
6.7. reboot
Description
reboot command is used to reboot the board.
Example
reboot
6.8. ram
ram command is used to query the size of the remaining heap in the system.
Example
ram
Espressif
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FCC Warning:
Any changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following
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 operaion.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance
20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna
or transmitter.
FCC Label Instructions:
If using a permanently affixed label, the modular transmitter must be labeled with its own
FCC identification number, and, if the FCC identification number is not visible when the
module is installed inside another device, then the outside of the device into which the module
is installed must also display a label referring to the enclosed module. This exterior label
can use wording such as the following:
“Contains Transmitter Module FCC ID: 2AC7Z-ESP32WROVER, or
“Contains FCC ID: 2AC7Z-ESP32WROVER
Any similar wording that expresses the same meaning may be used. The Grantee may
either provide such a label, an example of which must be included in the application for
equipment authorization, or, must provide adequate instructions along with the module which
explain this requirement.
Disclaimer and Copyright Notice
Information in this document, including URL references, is subject to change without
notice.
THIS DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER,
INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, FITNESS
FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT
OF ANY PROPOSAL, SPECIFICATION OR SAMPLE.
All liability, including liability for infringement of any proprietary rights, relating to use of
information in this document is disclaimed. No licenses express or implied, by estoppel or
otherwise, to any intellectual property rights are granted herein.
The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance. The Bluetooth logo is
a registered trademark of Bluetooth SIG.
Espressif IOT Team
All trade names, trademarks and registered trademarks mentioned in this document are
property of their respective owners, and are hereby acknowledged.
www.espressif.com
Copyright Š 2017 Espressif Inc. All rights reserved.
Espressif
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2017.05

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