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ESP32 SoC Lineup: Which One Fits Your IoT Project Best?

ESP32 SoC Lineup: Which One Fits Your IoT Project Best?

Choosing the right ESP product for your IoT project can be a daunting task, given the wide range of options provided by Espressif Systems. Range of ESP32 SoC developed by Espressif systems are widely used in IoT applications due to their low cost, low power consumption, and compatibility with a wide range of sensors and modules.

In this blog, we will be looking at the specification of the following ESP32 Socs:

  • ESP32
  • ESP32 S2
  • ESP32 S3
  • ESP32 C2
  • ESP32 C6
  • ESP32 H2

Also, we will be comparing these ESP32 SoC on the basis of Processing Power, Memory, Connectivity and  Price. I hope this blog helps you to choose the best ESP product for your IoT project

ESP32 ESP32-S2 ESP32-S3 ESP32-C3 ESP32-C6 ESP32-H2
Processor Tensilica Xtensa 32-bit 240MHz dual core Tensilica Xtensa 32 bit 240MHz single-core Tensilica Xtensa 32 bit 240MHz dual-core RISC V 32 bit 160MHz RISC V 32 bit 160MHz RISC V 32 bit 160MHz
SRAM 520KB 320KB 520KB 400KB 512KB 320KB
ROM 448KB 128KB 384KB 384KB 320KB 128KB
WiFi WiFi 4 WiFi4 WiFi4 WiFi4 WiFi6 WiFi6
BLE BLE 4.2 No BLE5.0 BLE5.0 BLE5.0 BLE5.0
RTC 16KB 16KB 16KB 8KB 16KB x
Flash Encryption Yes XTS-AES-128/256 Yes XTS-AES-128 XTS-AES-128 XTS-AES-128

Processing Power:

Selecting the right processing power for your IoT project is crucial when choosing an ESP microcontroller. High processing power needs call for a dual-core processor like the ESP32, and ESP32 S3, while single-core processors such as ESP32 C2, ESP32 S2, or ESP32 H2 are suitable for lower processing power requirements.


Memory capacity is another critical factor. The ESP32 S3 offers 512KB SRAM and 4MB flash memory for projects with high memory demands. For projects needing less memory, consider ESP products with smaller capacities like ESP32 C6 or ESP32 C3, which provide 400KB of SRAM.

Power Consumption:

For IoT projects relying on battery power, energy efficiency is vital, especially if your IoT product runs on a battery. ESP32 C6, ESP32 C3, or ESP32 H2 use RISC V 32-bit processors which are designed to consume less power making them ideal for battery-powered devices and wearables.


ESP Products are known for their WiFi and BLE connectivity capabilities, which makes them an ideal choice for IoT applications. If your project requires WiFi 6 connectivity, you should consider ESP32 C6 else you can consider ESP32 S3 or ESP32 S2. If your project requires BLE5.2 then you can go with ESP32-S3, ESP32-C3 or ESP32-C6.


In today's connected world, IoT device security is paramount. If you want to make your IoT project more secure, you should consider ESP32-S2, ESP32-C3 or ESP32-C6 which comes with XTS-AES-128/256 flash encryption.

Zigbee and Openthread Compatibility:

ESP32-C6 and ESP32-H2 have integrated radios for Thread and Zigbee protocols. Additionally, ESP32 C Series is matter certified. ESP32 S and ESP32 C can be used as board routers for thread applications and ESP32 H2 as radio coprocessors making them an ideal choice for Thread, Matter and Zigbee-based projects.


Finally, the price is an essential consideration when choosing an ESP product for your IoT project. ESP products are known for their affordability, but the price can depend on the features and specifications of the microcontroller. You should choose an ESP SoC that fits within your budget while still meeting the requirements of your IoT project.


In conclusion, I hope this summary will help you choose an ESP SoC that meets your project requirements and helps your IoT goals.

I hope you gained valuable insights from this comparison summary. As we continue to come up with more interesting tutorials and maker content, we invite you to explore Bytebeam further and see how our platform can empower your projects.

Stay tuned!