Chip vs Chip

ESP32-C3 vs WBZ451

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Side-by-side comparison of ESP32-C3 and WBZ451 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

        A
        
ESP32-C3

      

      

    
    
      

        B
        
WBZ451

      

      

    
  

  

  
  

  






  
  

    
Overview


The ESP32-C3 and WBZ451 both offer BLE connectivity with additional wireless protocols, but in different directions. Espressif's ESP32-C3 combines Wi-Fi 4 and Bluetooth Low Energy 5.0 at ~$1.50, targeting low-cost IoT nodes with strong open-source support. Microchip's WBZ451 pairs BLE 5.2 with Zigbee 3.0 on an ARM Cortex-M4 running at 64 MHz, targeting smart home and industrial mesh applications where Zigbee interoperability and integration with Microchip's PIC/AVR/SAM ecosystem are priorities.




Key Differences


    

  • Protocol set: ESP32-C3 offers Wi-Fi 4 + BLE 5.0; WBZ451 offers BLE 5.2 + Zigbee 3.0 (no Wi-Fi).
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  • BLE version: WBZ451 supports BLE 5.2 vs. ESP32-C3's BLE 5.0—the WBZ451 gains enhanced advertising, ATT">GATT caching, and Direction Finding.
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  • Zigbee: WBZ451 includes certified Zigbee 3.0; ESP32-C3 has no Zigbee support.
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  • Wi-Fi: ESP32-C3 includes Wi-Fi 4; WBZ451 has no Wi-Fi.
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  • Ecosystem: WBZ451 integrates with MPLAB X IDE, Harmony 3 middleware, and Microchip's Trust Platform; ESP32-C3 uses ESP-IDF or Arduino.
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  • Cost: ESP32-C3 is ~$1.50; WBZ451 is ~$3.00–4.00.
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  • Memory: ESP32-C3 has 400 KB SRAM + 4 MB flash; WBZ451 has 256 KB RAM + 1 MB flash.
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Use Cases


Choose ESP32-C3 when:
- Wi-Fi+BLE is the required protocol combination at minimum cost.
- Open-source development speed and library breadth Thread/Wi-Fi." data-category="Protocols & Profiles">matter.
- Zigbee is not required.


Choose WBZ451 when:
- BLE 5.2 + Zigbee 3.0 for smart home mesh interoperability is required.
- The team is already Microchip/MPLAB native and prefers Harmony 3 middleware.
- Certified Zigbee 3.0 compliance for market entry is needed.




Verdict


For Wi-Fi+BLE cost-optimized IoT nodes, the ESP32-C3 is superior. For BLE+Zigbee dual-protocol smart home applications within the Microchip ecosystem, the WBZ451 is the appropriate choice. These chips rarely compete for the same design win; protocol requirements typically make the decision clear.

  

  

  
  

  
  

    




  
Frequently Asked Questions


  

    
    

      
      

        
Our comparisons use verified datasheet specifications to create side-by-side tables. Each comparison includes a verdict explaining when to choose each option based on your project requirements.