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-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.

• 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

• Datasheet