ESP32-C3-WROOM-02-H4

Part: ESP32-C3-WROOM-02-H4 — Espressif Systems

Type: Wi-Fi and Bluetooth LE Module (ESP32-C3 based)

Description: 2.4 GHz Wi-Fi (802.11b/g/n) and Bluetooth 5 LE module built around the ESP32-C3 single-core 32-bit RISC-V CPU at up to 160 MHz, with 4 MB Quad SPI flash, 15 GPIOs and an on-board PCB antenna, rated for -40 to 105 °C ambient.

Operating Conditions:

• Supply voltage (VDD33): 3.0–3.6 V (3.3 V typ)
• Operating ambient temperature: -40 to 105 °C for the H4 variant (the N-variants are rated -40 to 85 °C)
• Current delivered by external power supply: 0.5 A min

Absolute Maximum Ratings:

• Max supply voltage (VDD33): 3.6 V (min -0.3 V)
• Storage temperature: -40 to 105 °C

Key Specs:

• CPU: 32-bit RISC-V single-core, up to 160 MHz
• Memory: 384 KB ROM, 400 KB SRAM (16 KB for cache), 8 KB RTC SRAM
• Flash: 4 MB Quad SPI (default max flash clock 80 MHz)
• Wi-Fi: IEEE 802.11b/g/n, 2412–2484 MHz, 1T1R, up to 150 Mbps, 20/40 MHz bandwidth
• Bluetooth LE 5 with 125 Kbps, 500 Kbps, 1 Mbps and 2 Mbps rates; Bluetooth mesh
• GPIOs: up to 15
• Module size: 18.0 × 20.0 × 3.2 mm
• Embedded chip revision: v0.4
• Strapping pin hold time (tH): 3 ms min

Features:

• On-board PCB antenna (the -02U variant uses an external antenna connector)
• Integrated 40 MHz crystal oscillator and SPI flash
• Peripherals: SPI, UART, I2C, I2S, remote control, LED PWM, general DMA, TWAI (ISO 11898-1 compatible), USB Serial/JTAG, temperature sensor, SAR ADC, timers, watchdogs
• Wi-Fi: WMM, A-MPDU/A-MSDU, 4 virtual interfaces, Station/SoftAP/Station+SoftAP/promiscuous modes, 802.11mc FTM
• Bluetooth LE: advertising extensions, multiple advertisement sets, channel selection algorithm #2
• Internal Wi-Fi/Bluetooth coexistence sharing the same antenna
• RoHS/REACH green certification

Applications:

• Smart home
• Industrial automation
• Health care
• Consumer electronics
• Smart agriculture
• POS machines
• Service robots
• Audio devices
• Low-power IoT sensor hubs
• Low-power IoT data loggers

Package:

• Module with 19 pins, 18.0 × 20.0 × 3.2 mm (ESP32-C3-WROOM-02 series)

• Supports Single SPI, Dual SPI, and Quad SPI, QPI modes
• Configurable clock frequency with a maximum of 120 MHz in Single Transfer Rate (STR) mode
• Data transmission is in bytes

• Smart Home
• Industrial Automation
• Health Care
• Consumer Electronics
• Smart Agriculture
• POS Machines
• Service Robot
• Audio Devices
• Generic Low-power IoT Sensor Hubs
• Generic Low-power IoT Data Loggers

The module has 19 pins. See pin definitions in T able 3-1 Pin Definitions .

For peripheral pin configurations, please refer to Section 5.2 Peripheral Description .

Table 3-1. Pin Definitions

Cont'd on next page

Table 3-1 - cont'd from previous page

Table 6-3. DC Characteristics (3.3 V, 25 °C)

Stresses above those listed in T able 6-1 Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under T able 6-2 Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Table 6-1. Absolute Maximum Ratings

Table 6-2. Recommended Operating Conditions

This section provides the following resources for your reference:

• Figures for recommended PCB land patterns with all the dimensions needed for PCB design. See Figure 11-1 ESP32-C3-WROOM-02 Recommended PCB Land Pattern and Figure 11-2 ESP32-C3-WROOM-02U Recommended PCB Land Pattern .
• Source files of recommended PCB land patterns to measure dimensions not covered in Figure 11-1 and Figure 11-2. You can view the source files for ESP32-C3-WROOM-02 and ESP32-C3-WROOM-02U with Autodesk Viewer.
• 3D models of ESP32-C3-WROOM-02 and ESP32-C3-WROOM-02U. Please make sure that you download the 3D model file in .STEP format. Beware that some browsers might add .txt.

Figure 11-1. ESP32-C3-WROOM-02 Recommended PCB Land Pattern

Figure 11-2. ESP32-C3-WROOM-02U Recommended PCB Land Pattern