The Beken BK7238 and the Espressif ESP8685 are two different microcontroller chips designed for IoT and embedded applications. Here is a detailed comparison:


  • BK7238: Produced by Beken Corporation.
  • ESP8685: Developed by Espressif Systems.

Key Features


  • Core: ARM Cortex-M33.
  • Clock Speed: Up to 120 MHz.
  • Wireless Connectivity: Wi-Fi (802.11 b/g/n), Bluetooth Low Energy (BLE) 5.0.
  • Memory:
  • SRAM: Typically 352 KB (varies with specific models)
  • Flash: Integrated, typically up to 4 MB.
  • GPIOs: Varies by model (typically fewer than ESP8685).
  • Peripherals: SPI, I2C, UART, ADC, PWM, etc.
  • Power Consumption: Various low-power modes.
  • Security: Basic security features (some models may have advanced features).


  • Core: Single-core RISC-V (based on Espressif’s design).
  • Clock Speed: Up to 160 MHz.
  • Wireless Connectivity: Wi-Fi (802.11 b/g/n), Bluetooth Low Energy (BLE) 5.0.
  • Memory:
  • SRAM: Typically 320 KB
  • Flash: 2 MB embedded.
  • GPIOs: 17 GPIOs.
  • Peripherals: SPI, I2C, UART, ADC, DAC, PWM, etc.
  • Power Consumption: Various low-power modes, including deep sleep and light sleep.
  • Security: Secure boot, flash encryption, cryptographic hardware acceleration.

Use Cases

  • BK7238: Suitable for applications requiring moderate processing power, Wi-Fi and BLE connectivity, and cost-effective solutions. Commonly used in consumer electronics, simple IoT devices, and smart home products.
  • ESP8685: Ideal for applications that need a compact and integrated solution with Wi-Fi and BLE connectivity, enhanced security features, and more processing power. Suitable for IoT devices, smart home products, wearables, and more advanced applications.

Ecosystem and Development

  • BK7238: Development support varies, often includes SDKs provided by Beken. Community support and documentation may not be as extensive as Espressif’s.
  • ESP8685: Supported by Espressif’s ESP-IDF (Espressif IoT Development Framework) and the Arduino IDE. Extensive community support and comprehensive documentation.


  • The ESP8685 offers a more robust security feature set, slightly higher processing power, and better development ecosystem support compared to the BK7238.
  • The BK7238 is a cost-effective solution with decent performance and basic security, suitable for simpler applications where cost is a significant factor.

Choosing between the two depends on the specific requirements of the application, including the need for processing power, security features, development support, and cost considerations.

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