WARNING:pdfminer.pdfpage:The PDF <_io.BufferedReader name='/Volumes/Scratch/Incoming/eg-scratch/5995050.pdf'> contains a metadata field indicating that it should not allow text extraction. Ignoring this field and proceeding. Use the check_extractable if you want to raise an error in this case ESP8685WROOM05 User Manual Pre-release v0.1 Espressif Systems Copyright 2022 www.espressif.com About This Document This user manual shows how to get started with the ESP8685-WROOM-05 module. Document Updates Please always refer to the latest version on https://www.espressif.com/en/support/download/documents. Revision History For revision history of this document, please refer to the last page. Documentation Change Notification Espressif provides email notifications to keep you updated on changes to technical documentation. Please sub-
scribe at www.espressif.com/en/subscribe. Certification Download certificates for Espressif products from www.espressif.com/en/certificates. Contents Contents 1 Overview 1.1 Module Overview 1.2 Pin Description 2 Get Started on ESP8685WROOM05 2.1 What You Need 2.2 2.3 Hardware Connection Set up Development Environment 2.3.1 Install Prerequisites 2.3.2 Get ESP-IDF 2.3.3 2.3.4 Set up Tools Set up Environment Variables 2.4 Create Your First Project 2.4.1 Start a Project 2.4.2 Connect Your Device 2.4.3 Configure 2.4.4 Build the Project 2.4.5 Flash onto the Device 2.4.6 Monitor 3 U.S. FCC Statement 4 IC Statement Learning Resources 5 5.1 Must-Read Documents 5.2 Important Resources Revision History 4 4 5 7 7 7 8 8 8 9 9 9 9 9 9 10 11 12 13 17 20 20 20 21 Espressif Systems 3 ESP8685-WROOM-05 User Manual v0.1 1 Overview 1 Overview 1.1 Module Overview ESP8685-WROOM-05 is a general-purpose Wi-Fi and Bluetooth LE module. The rich set of peripherals and a small size make this module an ideal choice for smart homes, industrial automation, health care, consumer electronics, etc. Table 1: ESP8685WROOM05 Specifications Categories Parameters Specifications Wi-Fi Bluetooth Protocols Frequency range Protocols Radio Module interfaces Integrated crystal 802.11 b/g/n (up to 150 Mbps) 2412 ~ 2462 MHz Bluetooth LE: Bluetooth 5 and Bluetooth mesh Class-1, class-2 and class-3 transmitter GPIO, SPI, UART, I2C, I2S, remote control peripheral, LED PWM controller, general DMA controller, TWAI controller (compatible with ISO 11898-1), temperature sensor, SAR ADC 40 MHz crystal Operating voltage/Power supply 3.0 V ~ 3.6 V Hardware Operating current Average: 80 mA Minimum current delivered by power supply Ambient temperature Moisture sensitivity level (MSL) 500 mA 40 C ~ +105 C Level 3 Espressif Systems 4 ESP8685-WROOM-05 User Manual v0.1 1 Overview 1.2 Pin Description Figure 1: Pin Layout (Top View) The module has 7 pins and 6 test points. See pin definitions in Table 2. For peripheral pin configurations, please refer to ESP8685 Datasheet . Table 2: Pin Definitions Name No. Type1 Function IO3 IO7 IO6 IO4 IO5 GND 1 2 3 4 5 6 I/O/T GPIO3, ADC1_CH3, LED PWM I/O/T GPIO7, FSPID, MTDO, LED PWM I/O/T GPIO6, FSPICLK, MTCK, LED PWM I/O/T GPIO4, ADC1_CH4, FSPIHD, MTMS, LED PWM I/O/T GPIO5, ADC2_CH0, FSPIWP, MTDI, LED PWM P Ground Contd on next page Espressif Systems 5 ESP8685-WROOM-05 User Manual v0.1 Keepout ZonePin Layout (Top)1234567IO3IO7IO6IO4IO5GND3V3GND3V3RXTXIO9ENEPADPin Layout (Bottom)Keepout Zone76543213V3GNDIO5IO4IO6IO7IO3891011121314 1 Overview Table 2 contd from previous page Name No. Type1 Function 3V3 7 P Power supply 1 P: power supply; I: input; O: output; T: high impedance. Table 3: Test Point Definitions Name No. Type1 Function GND 3V3 RX TX IO9 EN 8 9 10 11 12 13 P P Ground Power supply I/O/T GPIO20, U0RXD I/O/T GPIO21, U0TXD I/O/T GPIO9 High: on, enables the chip. I Low: off, the chip powers off. By default, this pin is internally pulled high. 1 P: power supply; I: input; O: output; T: high impedance. Espressif Systems 6 ESP8685-WROOM-05 User Manual v0.1 2 Get Started on ESP8685-WROOM-05 2 Get Started on ESP8685WROOM05 2.1 What You Need To develop applications for ESP8685-WROOM-05 module you need:
1 x ESP8685-WROOM-05 module 1 x Espressif RF testing board 1 x USB-to-Serial board 1 x Micro-USB cable 1 x PC running Linux In this user guide, we take Linux operating system as an example. For more information about the configuration on Windows and macOS, please refer to ESP-IDF Programming Guide. 2.2 Hardware Connection 1. Solder the ESP8685-WROOM-05 module to the RF testing board as shown in Figure 2. Figure 2: Hardware Connection 2. Connect the RF testing board to the USB-to-Serial board via TXD, RXD, and GND. 3. Connect the USB-to-Serial board to the PC. 4. Connect the RF testing board to the PC or a power adapter to enable 5 V power supply, via the Micro-USB cable. 5. During download, connect IO0 to GND via a jumper. Then, turn ON the testing board. 6. Download firmware into flash. For details, see the sections below. Espressif Systems 7 ESP8685-WROOM-05 User Manual v0.1 2 Get Started on ESP8685-WROOM-05 7. After download, remove the jumper on IO9 and GND. 8. Power up the RF testing board again. ESP8685-WROOM-05 will switch to working mode. The chip will read programs from flash upon initialization. Note:
IO9 is internally logic high. If IO9 is pulled low, the Download mode is selected. In other cases, the Boot mode is selected. 2.3 Set up Development Environment The Espressif IoT Development Framework (ESP-IDF for short) is a framework for developing applications based on the Espressif chips. Users can develop applications with ESP chips in Windows/Linux/macOS based on ESP-IDF. Here we take Linux operating system as an example. 2.3.1 Install Prerequisites To compile with ESP-IDF you need to get the following packages:
CentOS 7:
sudo yum install git wget flex bison gperf python cmake ninja-build ccache dfu-util Ubuntu and Debian (one command breaks into two lines):
sudo apt-get install git wget flex bison gperf python python-pip python-setuptools cmake ninja-build ccache libffi-dev libssl-dev dfu-util Arch:
sudo pacman -S --needed gcc git make flex bison gperf python-pip cmake ninja ccache dfu-util Note:
This guide uses the directory ~/esp on Linux as an installation folder for ESP-IDF. Keep in mind that ESP-IDF does not support spaces in paths. 2.3.2 Get ESPIDF To build applications for ESP8685-WROOM-05 module, you need the software libraries provided by Espressif in ESP-IDF repository. To get ESP-IDF, create an installation directory (~/esp) to download ESP-IDF to and clone the repository with git clone:
mkdir -p ~/esp cd ~/esp git clone --recursive https://github.com/espressif/esp-idf.git ESP-IDF will be downloaded into ~/esp/esp-idf. Consult ESP-IDF Versions for information about which ESP-IDF version to use in a given situation. Espressif Systems 8 ESP8685-WROOM-05 User Manual v0.1 2 Get Started on ESP8685-WROOM-05 2.3.3 Set up Tools Aside from the ESP-IDF, you also need to install the tools used by ESP-IDF, such as the compiler, debugger, Python packages, etc. ESP-IDF provides a script named install.sh to help set up the tools in one go. cd ~/esp/esp-idf
./install.sh 2.3.4 Set up Environment Variables The installed tools are not yet added to the PATH environment variable. To make the tools usable from the command line, some environment variables must be set. ESP-IDF provides another script export.sh which does that. In the terminal where you are going to use ESP-IDF, run:
. $HOME/esp/esp-idf/export.sh Now everything is ready, you can build your first project on ESP8685-WROOM-05 module. 2.4 Create Your First Project 2.4.1 Start a Project Now you are ready to prepare your application for ESP8685-WROOM-05 module. You can start with get-started/hello_world project from examples directory in ESP-IDF. Copy get-started/hello_world to ~/esp directory:
cd ~/esp cp -r $IDF_PATH/examples/get-started/hello_world . There is a range of example projects in the examples directory in ESP-IDF. You can copy any project in the same way as presented above and run it. It is also possible to build examples in-place, without copying them first. 2.4.2 Connect Your Device Now connect your ESP8685-WROOM-05 module to the computer and check under what serial port the module is visible. Serial ports in Linux start with /dev/tty in their names. Run the command below two times, first with the board unplugged, then with plugged in. The port which appears the second time is the one you need:
ls /dev/tty*
Note:
Keep the port name handy as you will need it in the next steps. 2.4.3 Configure Navigate to your hello_world directory from Step 2.4.1. Start a Project, set ESP8685 as the target and run the project configuration utility menuconfig. cd ~/esp/hello_world idf.py set-target esp32c3 idf.py menuconfig Espressif Systems 9 ESP8685-WROOM-05 User Manual v0.1 2 Get Started on ESP8685-WROOM-05 Setting the target with idf.py set-target esp32c3 should be done once, after opening a new project. If the project contains some existing builds and configuration, they will be cleared and initialized. The target may be saved in environment variable to skip this step at all. See Selecting the Target for additional information. If the previous steps have been done correctly, the following menu appears:
Figure 3: Project Configuration Home Window The colors of the menu could be different in your terminal. You can change the appearance with the option --style. Please run idf.py menuconfig --helpfor further information. 2.4.4 Build the Project Build the project by running:
idf.py build This command will compile the application and all ESP-IDF components, then it will generate the bootloader, partition table, and application binaries.
$ idf.py build Running cmake in directory /path/to/hello_world/build Executing cmake -G Ninja --warn-uninitialized /path/to/hello_world... Warn about uninitialized values.
-- Found Git: /usr/bin/git (found version 2.17.0)
-- Building empty aws_iot component due to configuration
-- Component names: ...
-- Component paths: ... .. (more lines of build system output)
[527/527] Generating hello-world.bin esptool.py v2.3.1 Project build complete. To flash, run this command:
Espressif Systems 10 ESP8685-WROOM-05 User Manual v0.1 2 Get Started on ESP8685-WROOM-05
../../../components/esptool_py/esptool/esptool.py -p (PORT) -b 921600 write_flash --flash_mode dio
--flash_size detect --flash_freq 40m 0x10000 build/hello-world.bin build 0x1000 build/bootloader/bootloader.bin 0x8000 build/partition_table/partition-table.bin or run idf.py -p PORT flash If there are no errors, the build will finish by generating the firmware binary .bin file. 2.4.5 Flash onto the Device Flash the binaries that you just built onto your ESP8685-WROOM-05 module by running:
idf.py -p PORT [-b BAUD] flash Replace PORT with your modules serial port name from Step: Connect Your Device. You can also change the flasher baud rate by replacing BAUD with the baud rate you need. The default baud rate is 460800. For more information on idf.py arguments, see idf.py. Note:
The option flash automatically builds and flashes the project, so running idf.py build is not necessary. .. esptool.py --chip esp32c3 -p /dev/ttyUSB0 -b 460800 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 2MB 0x8000 partition_table/partition-table.bin 0x0 bootloader/bootloader.bin 0x10000 hello-world.bin esptool.py v3.0 Serial port /dev/ttyUSB0 Connecting.... Chip is ESP8685 Features: Wi-Fi Crystal is 40MHz MAC: 7c:df:a1:40:02:a4 Uploading stub... Running stub... Stub running... Changing baud rate to 460800 Changed. Configuring flash size... Compressed 3072 bytes to 103... Writing at 0x00008000... (100 %) Wrote 3072 bytes (103 compressed) at 0x00008000 in 0.0 seconds (effective 4238.1 kbit/s)... Hash of data verified. Compressed 18960 bytes to 11311... Writing at 0x00000000... (100 %) Wrote 18960 bytes (11311 compressed) at 0x00000000 in 0.3 seconds (effective 584.9 kbit/s)... Hash of data verified. Compressed 145520 bytes to 71984... Writing at 0x00010000... (20 %) Writing at 0x00014000... (40 %) Writing at 0x00018000... (60 %) Writing at 0x0001c000... (80 %) Espressif Systems 11 ESP8685-WROOM-05 User Manual v0.1 2 Get Started on ESP8685-WROOM-05 Writing at 0x00020000... (100 %) Wrote 145520 bytes (71984 compressed) at 0x00010000 in 2.3 seconds (effective 504.4 kbit/s)... Hash of data verified. Leaving... Hard resetting via RTS pin... Done If everything goes well, the hello_world application starts running after you remove the jumper on IO0 and GND, and re-power up the testing board. 2.4.6 Monitor To check if hello_world is indeed running, type idf.py -p PORT monitor (Do not forget to replace PORT with your serial port name). This command launches the IDF Monitor application:
$ idf.py -p /dev/ttyUSB0 monitor Running idf_monitor in directory [...]/esp/hello_world/build Executing python [...]/esp-idf/tools/idf_monitor.py -b 115200 [...]/esp/hello_world/build/hello-world.elf...
--- 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
... After startup and diagnostic logs scroll up, you should see Hello world! printed out by the application. .. Hello world!
Restarting in 10 seconds... This is esp32c3 chip with 1 CPU core, WiFi/BLE Restarting in 9 seconds... Restarting in 8 seconds... Restarting in 7 seconds... To exit IDF monitor use the shortcut Ctrl+]. Thats all what you need to get started with ESP8685-WROOM-05 module! Now you are ready to try some other examples in ESP-IDF, or go right to developing your own applications. Espressif Systems 12 ESP8685-WROOM-05 User Manual v0.1 3 U.S. FCC Statement 3 U.S. FCC Statement The device complies with KDB 996369 D03 OEM Manual v01. Below are integration instructions for host product manufacturers according to the KDB 996369 D03 OEM Manual v01. List of Applicable FCC Rules FCC Part 15 Subpart C 15.247 Specific Operational Use Conditions The module has WiFi and BLE functions. Operation Frequency:
WiFi: 2412 ~ 2462 MHz Bluetooth: 2402 ~ 2480 MHz Number of Channel:
WiFi: 11 Bluetooth: 40 Modulation:
WiFi: DSSS; OFDM Bluetooth: GFSK Type: On-board PCB antenna Gain: 3.96 dBi Max The module can be used for IoT applications with a maximum 3.96 dBi antenna. The host manufacturer installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation. The host manufacturer has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Limited Module Procedures Not applicable. The module is a single module and complies with the requirement of FCC Part 15.212. Trace Antenna Designs Not applicable. The module has its own antenna, and does not need a hosts printed board microstrip trace antenna, etc. RF Exposure Considerations The module must be installed in the host equipment such that at least 20cm is maintained between the antenna and users body; and if RF exposure statement or module layout is changed, then the host product manufacturer Espressif Systems 13 ESP8685-WROOM-05 User Manual v0.1 3 U.S. FCC Statement required to take responsibility of the module through a change in FCC ID or new application. The FCC ID of the module cannot be used on the final product. In these circumstances, the host manufacturer will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. Antennas Antenna specification are as follows:
Type: On-board PCB antenna Gain: 3.96 dBi This device is intended only for host manufacturers under the following conditions:
The transmitter module may not be co-located with any other transmitter or antenna. The module shall be only used with the external antenna(s) that has been originally tested and certified with this module. The antenna must be either permanently attached or employ a unique antenna coupler. As long as the conditions above are met, further transmitter test will not be required. However, the host manufac-
turer is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.). Label and Compliance Information Host product manufacturers need to provide a physical or e-label stating Contains FCC ID: 2AC7Z-ESP868505 with their finished product. Information on test modes and additional testing requirements Operation Frequency:
WiFi: 2412 ~ 2462 MHz Bluetooth: 2402 ~ 2480 MHz Number of Channel:
WiFi: 11 Bluetooth: 40 Modulation:
WiFi: DSSS; OFDM Bluetooth: GFSK Host manufacturer must perform test of radiated and conducted emission and spurious emission, etc., according to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. Only when all the test results of test modes comply with FCC requirements, then the end product can be sold legally. Espressif Systems 14 ESP8685-WROOM-05 User Manual v0.1 3 U.S. FCC Statement Additional testing, Part 15 Subpart B compliant The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part15 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 and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause 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 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. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference. This device must accept any interference received, including interference that may cause undesired opera-
tion. Caution:
Any changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This device and its antenna must not be co-located or operating in conjunction with any other antenna or transmitter. The antennas used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. OEM Integration Instructions This device is intended only for OEM integrators under the following conditions:
The transmitter module may not be co-located with any other transmitter or antenna. The module shall be only used with the external antenna(s) that has been originally tested and certified with this module. As long as the conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.). Espressif Systems 15 ESP8685-WROOM-05 User Manual v0.1 3 U.S. FCC Statement Validity of Using the Module Certification In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization for this module in combination with the host equipment is no longer considered valid and the FCC ID of the module cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. End Product Labeling The final end product must be labeled in a visible area with the following: Contains Transmitter Module FCC ID:
2AC7Z-ESP868505. Espressif Systems 16 ESP8685-WROOM-05 User Manual v0.1 4 IC Statement 4 IC Statement This device complies with Industry Canadas licence-exempt RSSs. Operation is subject to the following two conditions:
This device may not cause interference; and This device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR dIndustrie Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes:
lappareil ne doit pas produire de brouillage, et lutilisateur de lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est suscep-
tible den compromettre le fonctionnement. Radiation Exposure Statement This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator and your body. Dclaration dexposition aux radiations:
Cet quipement est conforme aux limites dexposition aux rayonnements ISED tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec un minimum de 20 cm de distance entre la source de rayonnement et votre corps. RSS247 Section 6.4 (5) The device could automatically discontinue transmission in case of absence of information to transmit, or opera-
tional failure. Note that this is not intended to prohibit transmission of control or signaling information or the use of repetitive codes where required by the technology. Lappareil peut interrompre automatiquement la transmission en cas dabsence dinformations transmettre ou de panne oprationnelle. Notez que ceci nest pas destin interdire la transmission dinformations de contrle ou de signalisation ou lutilisation de codes rptitifs lorsque cela est requis par la technologie. This device is intended only for OEM integrators under the following conditions (For module device use):
The antenna must be installed such that 20 cm is maintained between the antenna and users, and The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed. Espressif Systems 17 ESP8685-WROOM-05 User Manual v0.1 4 IC Statement Cet appareil est conu uniquement pour les intgrateurs OEM dans les conditions suivantes (Pour utilisa tion de dispositif module):
Lantenne doit tre installe de telle sorte quune distance de 20 cm est respecte entre lantenne et les utilisateurs, et Le module metteur peut ne pas tre complant avec un autre metteur ou antenne. Tant que les 2 conditions ci-dessus sont remplies, des essais supplmentaires sur lmetteur ne seront pas nces-
saires. Toutefois, lintgrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformit supplmentaires requis pour ce module install. IMPORTANT NOTE:
In the event that these conditions can not be met (for example certain laptop configurations or colocation with another transmitter), then the Canada authorization is no longer considered valid and the IC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product
(including the transmitter) and obtaining a separate Canada authorization. NOTE IMPORTANTE:
Dans le cas o ces conditions ne peuvent tre satisfaites (par exemple pour certaines configurations dordinateur portable ou de certaines co-localisation avec un autre metteur), lautorisation du Canada nest plus consid-
r comme valide et lID IC ne peut pas tre utilis sur le produit final. Dans ces circonstances, lintgrateur OEM sera charg de rvaluer le produit final (y compris lmetteur) et lobtention dune autorisation distincte au Canada. End Product Labeling This transmitter module is authorized only for use in device where the antenna may be installed such that 20 cm may be maintained between the antenna and users. The final end product must be labeled in a visible area with the following: Contains IC: 21098-ESP868505. Plaque signaltique du produit final Ce module metteur est autoris uniquement pour une utilisation dans un dispositif o lantenne peut tre installe de telle sorte quune distance de 20cm peut tre maintenue entre lantenne et les utilisateurs. Le produit final doit tre tiquet dans un endroit visible avec linscription suivante: Contient des IC: 21098-ESP868505. Manual Information to the End User The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the users manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual. Manuel dinformation lutilisateur final Lintgrateur OEM doit tre conscient de ne pas fournir des informations lutilisateur final quant la faon dinstaller ou de supprimer ce module RF dans le manuel de lutilisateur du produit final qui intgre ce module. Le manuel Espressif Systems 18 ESP8685-WROOM-05 User Manual v0.1 4 IC Statement de lutilisateur final doit inclure toutes les informations rglementaires requises et avertissements comme indiqu dans ce manuel. Espressif Systems 19 ESP8685-WROOM-05 User Manual v0.1 5 Learning Resources 5 Learning Resources 5.1 MustRead Documents Please familiarize yourself with the following documents:
ESP-IDF Programming Guide Extensive documentation for the ESP-IDF development framework, ranging from hardware guides to API reference. Espressif Products Ordering Information 5.2 Important Resources Here are the important ESP8685-related resources. ESP32 BBS Engineer-to-Engineer (E2E) Community for Espressif products where you can post questions, share knowl-
edge, explore ideas, and help solve problems with fellow engineers. Espressif Systems 20 ESP8685-WROOM-05 User Manual v0.1 Revision History Revision History Date Version Release notes 2022-06-28 V0.1 Preliminary release Espressif Systems 21 ESP8685-WROOM-05 User Manual v0.1 Disclaimer and Copyright Notice Information in this document, including URL references, is subject to change without notice. ALL THIRD PARTYS INFORMATION IN THIS DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES TO ITS AUTHENTICITY AND ACCURACY. NO WARRANTY IS PROVIDED TO THIS DOCUMENT FOR ITS MERCHANTABILITY, NON-
INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, NOR DOES 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. www.espressif.com All trade names, trademarks and registered trademarks mentioned in this document are property of their respective owners, and are hereby acknowledged. Copyright 2022 Espressif Systems (Shanghai) Co., Ltd. All rights reserved.