ESP32C3WROOM02 User Manual Pre-release v0.1 Espressif Systems Copyright © 2022 www.espressif.
About This Document This user manual shows how to get started with the ESP32-C3-WROOM-02 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 subscribe at www.espressif.com/en/subscribe.
Contents Contents 1 Overview 4 1.1 Module Overview 4 1.2 Pin Description 5 2 Get Started on ESP32C3WROOM02 7 2.1 What You Need 7 2.2 Hardware Connection 7 2.3 Set up Development Environment 8 2.3.1 Install Prerequisites 8 2.3.2 Get ESP-IDF 8 2.3.3 Set up Tools 9 2.3.4 Set up Environment Variables 9 2.4 Create Your First Project 9 2.4.1 Start a Project 9 2.4.2 Connect Your Device 9 2.4.3 Configure 9 2.4.4 Build the Project 10 2.4.
1 Overview 1 Overview 1.1 Module Overview ESP32-C3-WROOM-02 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: ESP32C3WROOM02 Specifications Categories Wi-Fi Bluetooth ® Parameters Specifications Protocols 802.
1 Overview 1.2 Pin Description Keepout Zone 1 3V3 IO0 18 2 EN IO1 17 3 IO4 IO2 16 4 IO5 IO3 15 IO19 14 IO18 13 GND GND GND GND Pin 19 GND GND GND GND GND 5 IO6 6 IO7 7 IO8 TXD 12 8 IO9 RXD 11 9 GND IO10 10 Figure 1: Pin Layout (Top View) The module has 19 pins. See pin definitions in Table 2. For peripheral pin configurations, please refer to ESP32-C3 Family Datasheet . Table 2: Pin Definitions Name No.
1 Overview Table 2 – cont’d from previous page Name No. Type Function TXD0 12 I/O/T U0TXD, GPIO21 IO18 13 — GPIO18, USB_D- IO19 14 I/O/T GPIO19, USB_D+ IO3 15 I/O/T GPIO3, ADC1_CH3 IO2 16 I/O/T GPIO2, ADC1_CH2, FSPIQ IO1 17 I/O/T GPIO1, ADC1_CH1, XTAL_32K_N (32.768 kHz crystal output) IO0 18 I/O/T GPIO0, ADC1_CH0, XTAL_32K_P (32.768 kHz crystal input) Espressif Systems 6 ESP32-C3-WROOM-02 User Manual v0.
2 Get Started on ESP32-C3-WROOM-02 2 Get Started on ESP32C3WROOM02 2.1 What You Need To develop applications for ESP32-C3-WROOM-02 module you need: • 1 x ESP32-C3-WROOM-02 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.
2 Get Started on ESP32-C3-WROOM-02 7. After download, remove the jumper on IO0 and GND, and the jumper wire to pull up IO8. 8. Power up the RF testing board again. ESP32-C3-WROOM-02 will switch to working mode. The chip will read programs from flash upon initialization. Note: IO0 is internally logic high. If IO0 is pulled low, and IO8 is pulled high, the Boot mode is selected. In other cases, the Download mode is selected.
2 Get Started on ESP32-C3-WROOM-02 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. 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. 1 cd ~/esp/esp-idf 2 ./install.sh 2.3.
2 Get Started on ESP32-C3-WROOM-02 1 cd ~/esp/hello_world 2 idf.py set-target esp32c3 3 idf.py menuconfig 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.
2 Get Started on ESP32-C3-WROOM-02 12 [527/527] Generating hello-world.bin 13 esptool.py v2.3.1 14 15 Project build complete. To flash, run this command: 16 ../../../components/esptool_py/esptool/esptool.py -p (PORT) -b 921600 write_flash --flash_ mode dio 17 --flash_size detect --flash_freq 40m 0x10000 build/hello-world.bin 18 build/bootloader/bootloader.bin 0x8000 build/partition_table/partition-table.bin build 0x1000 19 or run ’idf.
2 Get Started on ESP32-C3-WROOM-02 20 Compressed 18960 bytes to 11311... 21 Writing at 0x00000000... (100 %) 22 Wrote 18960 bytes (11311 compressed) at 0x00000000 in 0.3 seconds (effective 584.9 23 Hash of data verified. 24 Compressed 145520 bytes to 71984... 25 Writing at 0x00010000... (20 %) 26 Writing at 0x00014000... (40 %) 27 Writing at 0x00018000... (60 %) 28 Writing at 0x0001c000... (80 %) 29 Writing at 0x00020000...
2 Get Started on ESP32-C3-WROOM-02 That’s all what you need to get started with ESP32-C3-WROOM-02 module! Now you are ready to try some other examples in ESP-IDF, or go right to developing your own applications. Espressif Systems 13 ESP32-C3-WROOM-02 User Manual v0.
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 & 15.209 Specific Operational Use Conditions The module has WiFi, and BLE functions.
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.
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 & 15.209 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.
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.
4 IC Statement 4 IC Statement This device complies with Industry Canada’s 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 présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence.
4 IC Statement Cet appareil est conçu uniquement pour les intégrateurs OEM dans les conditions suivantes (Pour utilisa tion de dispositif module): • L’antenne doit être installée de telle sorte qu’une distance de 20 cm est respectée entre l’antenne et les utilisateurs, et • Le module émetteur peut ne pas être coïmplanté avec un autre émetteur ou antenne. Tant que les 2 conditions ci-dessus sont remplies, des essais supplémentaires sur l’émetteur ne seront pas nécessaires.
4 IC Statement de l’utilisateur final doit inclure toutes les informations réglementaires requises et avertissements comme indiqué dans ce manuel. This radio transmitter [IC:21098-ESPC3WROOM] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. • • Type: On-board PCB antenna • • Gain: 3.
5 Learning Resources 5 Learning Resources 5.1 MustRead Documents Please familiarize yourself with the following documents: • ESP32-C3 Family Datasheet This is an introduction to the specifications of the ESP32-C3 hardware, including overview, pin definitions, functional description, peripheral interface, electrical characteristics, etc. • ESP-IDF Programming Guide Extensive documentation for the ESP-IDF development framework, ranging from hardware guides to API reference.
Revision History Revision History Date Version Release notes 2022-04-28 V0.1 Preliminary release Espressif Systems 22 ESP32-C3-WROOM-02 User Manual v0.
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