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The ESP32-C3 – a cost-sensitive IoT chip with secure BT and Wi-Fi

The topic of security is here to stay in today’s IoT world, but many applications are simple and do not require dual-core MCUs. The previous ESP32 was already a security-oriented device and this trend was reinforced with the ESP32-S2 WiFi-only module, but until now no single-core combo modules were available from Espressif.

Espressif fills the gap between the successful but insecure ESP8266 and the dual-core ESP32 with the ESP32-C3. This new module targets simple and secure IoT applications where cost is an important consideration. The freely accessible RISC-V architecture and the BLE5 with long-range and coded PHY support make the ESP32-C3 one of the most promising combination modules on the market.

The ESP32-C3 is available as SoC as well as various pre-certified modules with PCB antenna or IPEX / UFL connector (of external antennas). Evaluation boards are available for both, the space-saving ESP32-C3-MINI-1 and the standard ESP32-C3-WROOM module. For more information, please refer to the PDF documents below.


Espressif starts this year with the ESP32-S3 an upgrade to the High-End Dual-Core „ESP32-X“. So also for high performance applications like modern A.I. solutions for image recognition Espressif will offer suitable products in the future.

Read the latest news about the next SoC generation here (ESP32-H2 and C6)

But back to the ESP32-C3 SoC and its modules presented here. The following overview gives a more detailed view of the main functions, possible further fields of application and your advantages when developing products with Wi-Fi and Bluetooth connectivity


  • WiFi (IEEE 802.11 b/g/n-compliant)
  • 32 bit RISC-V
    • Single core, up to 160MHz
  • Security
    • Flash encryption
    • Secure boot
    • Hardware cryptographic accelerators
  • BLE 5 (mesh, Long range, PHY w/ 2Mbps support)
  • Wide set of peripherals
    • 12 bit SAR ADC, temperature sensor
    • I2C, SPI, UART, TWAI, I2S
    • PWM 6 channel
    • DMA



  • General IoT applications
    • Home automation, voice controlled
    • Sensors
    • Thermostats
  • Smart agriculture
  • Bluetooth/WiFi medical equipment
    • Baby monitor, Health monitor
  • Wearable
    • Smart watch, fitness trackers


  • Combo WiFi+BLE5 with long range and mesh support
  • Extremely competitive price
  • Wide open source resources and documentation

We will be happy to support you directly to find the right product for your development in the growing number of product families offered by Espressif – please contact us!

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