esp32 VS React-Ionic

• Powerful Dual-core Processor
  The ESP32 features a dual-core processor, offering robust processing capability which is suitable for complex IoT applications and tasks that require a high performance.
• Integrated Wi-Fi and Bluetooth
  It comes with integrated Wi-Fi and Bluetooth (both Classic and BLE), which makes it very versatile for wireless communication in various projects.
• Low Power Consumption
  ESP32 is designed for low power consumption, making it a great choice for battery-powered devices and applications that require energy efficiency.
• Rich Peripheral Set
  The ESP32 includes a wide range of peripherals such as ADCs, DACs, capacitive touch sensors, and more, enabling diverse applications.
• Extensive Library Support
  There is strong community and library support, making development smoother with ready-to-use libraries and examples.
• Cost-effective
  Given its features, the ESP32 offers great value for money, being cost-effective for developers and prototyping needs.

Possible disadvantages

• Complexity in Setup and Use
  Due to its advanced features and configuration options, beginners might find the setup process and initial learning curve to be complex.
• Limited RAM
  The ESP32 has a limited amount of RAM, which can be a constraint for applications that require a lot of memory and data processing.
• Power Supply Sensitivity
  The ESP32 can be sensitive to power supply fluctuations, necessitating a stable power supply for reliable operation.
• Variability in Module Quality
  There is variability in quality across different ESP32 modules from various manufacturers, which can affect performance and reliability.

• Cross-Platform Development
  React-Ionic allows developers to build applications that run on both iOS and Android platforms using a single codebase, effectively saving time and resources.
• React Ecosystem
  Integration with the React ecosystem provides access to numerous libraries and tools, allowing developers to use familiar technologies and streamline the development process.
• Ionic Components
  Leverages Ionic's UI components that are designed to look and feel native on both iOS and Android, providing a consistent and polished user experience across platforms.
• Live Reloading
  Features like live reloading and hot module replacement can speed up the development process by allowing developers to see changes in real-time.
• Community Support
  Being part of the larger React and Ionic communities, developers can tap into extensive community support and resources to help solve issues and improve their applications.

Possible disadvantages

• Performance Overhead
  Applications built with React-Ionic may experience performance overhead compared to fully native apps, which can be a concern for performance-intensive applications.
• Learning Curve
  Developers new to the ecosystem might face a learning curve due to the combination of React and Ionic concepts and components.
• Platform-Specific Customization
  While React-Ionic provides cross-platform functionality, achieving platform-specific look and feel or leveraging native features can require additional customization and work.
• Ecosystem Dependence
  Reliance on both the Ionic framework and React means developers must stay current with updates and changes in both ecosystems, which can cause maintenance challenges.
• Bundle Size
  The inclusion of both React and Ionic libraries can lead to larger application bundle sizes, which might impact load times and performance on lower-end devices.

ESP32 Review: Using the ESP32 with the Arduino IDE

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• how and where to learn programming ESP32 in C?

  Esp32.net has a bunch of additional references, projects, and places to gather information. Source: over 5 years ago

• Is there any true Open Source WiFi cards over 802.11g?

  Closest thing is the ESP32 from Espressif Systems See ESP32 link for details. Since you specifically asked for open source, so some tinkering and compile is required. Source: over 5 years ago

• Buying advice, not sure which dev boards are really supported

  There's also many more dev boards, chips and modules listed here, though they may not necessarily have platformio IDs. Source: over 5 years ago

Tracking React-Ionic since Mar 2021.