# ESP32-C3 WROOM Module - 4MB (PCB Antenna)

**Type:** Product page · **SKU:** WRL-18034 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/esp32-c3-wroom-module-4mb-pcb-antenna.html ([markdown](https://core-electronics.com.au/esp32-c3-wroom-module-4mb-pcb-antenna.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

The Espressif ESP32-C3 is the next version of the popular ESP32 Bluetooth® and WiFi enabled module. This module features a single core, [RISC-V](https://riscv.org/)-based processor with WiFi and Bluetooth LE 5.0 radios built into the SoC. The module features a PCB antenna and castellated plated pins for surface-mount soldering. This variation has 4 MB of on-board SPI flash and is the 85 °C temperature tolerant version.

The 32-bit core RISC-V microcontroller features a maximum clock speed of 160 MHz. With 22 configurable GPIOs, 400 KB of internal RAM and low-power-mode support, it can facilitate many different use-cases involving connected devices. The high-temperature support makes it ideal for industrial and lighting use-cases as well. The module is supported through Espressif’s open-source ESP-IDF making it easy to develop around.

WiFi and Bluetooth LE 5.0 with long-range (LR) support help building devices with great coverage and improved usability. ESP32-C3 continues to support Bluetooth LE SIG Mesh and Espressif WiFi Mesh. Furthermore, the solid RF performance of ESP32-C3 is sustained at a higher operating temperature.

Security is now a main feature of the ESP32 line. The ESP32-C3 ensures that the availability of features, such as the RSA-3072-based secure boot and the AES-128-XTS-based flash encryption, can be used to build connected devices securely. The innovative digital signature peripheral and the HMAC peripheral provide a secure device identity for applications. Hardware acceleration support for cryptographic algorithms ensures good performance for the secure communication both in a local network and with the Cloud.

#### Specifications 

- **MCU**
    
    
    - ESP32-C3 embedded, 32-bit RISC-V single-coreprocessor, up to 160 MHz
    - 384 KB ROM
    - 400 KB SRAM (16 KB for cache)
    - 8 KB SRAM in RTC
- **WiFi**
    
    
    - IEEE 802.11 b/g/n-compliant
    - Center frequency range of operating channel:2412~2484 MHz
    - Supports 20 MHz, 40 MHz bandwidth in 2.4 GHzband
    - 1T1R mode with data rate up to 150 Mbps
    - Wi-Fi Multimedia (WMM)
    - TX/RX A-MPDU, TX/RX A-MSDU
    - Immediate Block ACK
    - Fragmentation and defragmentation
    - Transmit opportunity (TXOP)
    - Automatic Beacon monitoring (hardware TSF)
    - 4 × virtual Wi-Fi interfaces
    - Simultaneous support for Infrastructure BSS inStation mode, SoftAP mode, Station + SoftAPmode, and promiscuous modeNote that when ESP32-C3 family scans in Stationmode, the SoftAP channel will change along withthe Station channel.
    - Antenna diversity
    - 802.11mc FTM
- **Bluetooth**
    
    
    - Bluetooth LE: Bluetooth 5, Bluetooth mesh
    - Speed: 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps
    - Advertising extensions
    - Multiple advertisement sets
    - Channel selection algorithm #2
- **Hardware**
    
    
    - Interfaces:
        - GPIO
        - SPI
        - UART
        - I2C
        - I2S
        - remotecontrol peripheral
        - LED PWM controller
        - general DMA controller
        - TWAI® controller (compatible withISO 11898-1)
        - temperature sensor
        - SAR ADC
    - 40 MHz crystal oscillator
    - 4 MB SPI flash
    - Operating voltage/Power supply: 3.0~3.6 VDC
    - Operating ambient temperature: –40~85 °C (This is the 85 °C version module)
    - Dimensions: (18.0 × 20.0 × 3.2) mm

**Resources**

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/esp32-c3-wroom-02_datasheet_en_90609088aba.pdf)
- [ESP32-C3 Technical Reference Manual](https://core-electronics.com.au/attachments/localcontent/esp32-c3_technical_reference_manual_en_92725243376.pdf)
- [ESP-IDF Programming guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32c3/get-started/index.html)
- [GitHub Repo](https://github.com/espressif)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_662.jpg)