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Espressif Systems ESP8684-WROOM-02C User Manual

2.4 ghz wi-fi (802.11 b/g/n) and bluetooth 5 module

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ESP8684-WROOM-02C
User Manual
2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth
Built around ESP8684 series of SoC, RISC-V single-core microprocessor
2 MB/4 MB flash in chip package
14 GPIOs
On-board PCB antenna
®
5 module
ESP8684-WROOM-02C
www.espressif.com
Version0.5
Espressif Systems
Copyright © 2022

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Summary of Contents for Espressif Systems ESP8684-WROOM-02C

  • Page 1 ESP8684-WROOM-02C User Manual ® 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 module Built around ESP8684 series of SoC, RISC-V single-core microprocessor 2 MB/4 MB flash in chip package 14 GPIOs On-board PCB antenna ESP8684-WROOM-02C Version0.5 Espressif Systems Copyright © 2022...
  • Page 2 ESP8684-WROOM-02C is a general-purpose Wi-Fi and Bluetooth LE module. The rich set of peripherals and high performance make this module an ideal choice for smart homes, industrial automation, health care, consumer electronics, etc. ESP8684-WROOM-02C comes with an on-board PCB antenna. It can be mounted onto the surface of a PCB board. Espressif Systems ESP8684-WROOM-02C Datasheet v0.5...
  • Page 3 1 Module Overview The ordering information for ESP8684-WROOM-02C is as follows: Table 1: ESP8684-WROOM-02C Ordering Information Module Dimensions Module Ordering Code Chip Embedded SiP Flash (mm) ESP8684-WROOM-02C-N2 ESP8684H2 2 MB 20.0 × 18.0 × 3.2 ESP8684-WROOM-02C ESP8684-WROOM-02C-N4 ESP8684H4 4 MB The ESP8684H2 chip and the ESP8684H4 chip fall into the same category, namely ESP8684 chip series.
  • Page 4 Create Your First Project 3.4.1 Start a Project 3.4.2 Connect Your Device 3.4.3 Configure 3.4.4 Build the Project 3.4.5 Flash onto the Device 3.4.6 Monitor U.S. FCC Statement Related Documentation and Resources Revision History Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 5 Table 2: Pin Definitions Name Type Function Power supply High: on, enables the chip. Low: off, the chip powers off. Note: Do not leave the CHIP_EN pin floating. Cont’d on next page Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 6 GPIO19, U0RXD I/O/T GPIO20, U0TXD — IO18 I/O/T GPIO18 I/O/T GPIO3, ADC1_CH3 I/O/T GPIO2, ADC1_CH2, FSPIQ I/O/T GPIO1, ADC1_CH1 I/O/T GPIO0, ADC1_CH0 Ground P: power supply; I: input; O: output; T: high impedance. Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 7 ESP-IDF Programming Guide. 3.2 Hardware Connection 1. Solder the ESP8684-WROOM-02C 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.
  • Page 8 /esp on Linux as an installation folder for ESP-IDF. • Keep in mind that ESP-IDF does not support spaces in paths. 3.3.2 Get ESP-IDF To build applications for ESP8684-WROOM-02C module, you need the software libraries provided by Espressif in ESP-IDF repository.
  • Page 9 Now everything is ready, you can build your first project on ESP8684-WROOM-02C module. 3.4 Create Your First Project 3.4.1 Start a Project Now you are ready to prepare your application for ESP8684-WROOM-02C module. You can start with get-started/hello_world project from examples directory in ESP-IDF.
  • Page 10 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”... Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 11 --flash_mode dio --flash_freq 80m --flash_size 2MB 0x0 bootloader/bootloader. 0x10000 hello_world.bin 0x8000 partition_table/partition-table.bin esptool.py v3.2-dev Serial port /dev/ttyUSB0 Connecting..Chip is ESP8684 Features: WiFi, BLE Crystal is 40MHz MAC: 7c:df:a1:e0:00:64 Uploading stub... Running stub... Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 12 --- 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 Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 13 Restarting in 8 seconds... Restarting in 7 seconds... To exit IDF monitor use the shortcut Ctrl+]. That’s all what you need to get started with ESP8684-WROOM-02C module! Now you are ready to try some other examples in ESP-IDF, or go right to develop your own applications.
  • Page 14 The module must be installed in the host equipment such that at least 20 cm 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 ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 15 Only when all the test results of test modes comply with FCC requirements, then the end product can be sold legally. Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 16 • 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. Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 17 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-ESP868402C”. Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 18 Find an Espressif hardware product suitable for your needs by comparing or applying filters. https://products.espressif.com/#/product-selector?language=en Contact Us • See the tabs Sales Questions, Technical Enquiries, Circuit Schematic & PCB Design Review, Get Samples (Online stores), Become Our Supplier, Comments & Suggestions. https://espressif.com/en/contact-us/sales-questions Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 19 Revision History Revision History Date Version Release notes 2022-08-29 v0.5 For certification only Espressif Systems ESP8684-WROOM-02C Datasheet v0.5 Submit Documentation Feedback...
  • Page 20 The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance. The Bluetooth logo is a registered trademark of Bluetooth SIG. All trade names, trademarks and registered trademarks mentioned in this document are property www.espressif.com of their respective owners, and are hereby acknowledged. Copyright © 2022 Espressif Systems (Shanghai) Co., Ltd. All rights reserved.

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