Summary of ESPRESSIF ANNOUNCES THE RELEASE OF ESP32-S2 SECURE WI-FI MCU
The ESP32-S2 is a low-power, 2.4 GHz Wi-Fi SoC by Espressif featuring an Xtensa® single-core 32-bit LX7 processor clocked at 240 MHz. It offers 43 GPIOs, advanced security, and power management, making it ideal for smart home and wearable IoT devices. By utilizing the ESP-IDF framework, it balances performance and cost without needing external MCUs.
Parts used in the ESP32-S2:
- Xtensa single-core 32-bit LX7 microcontroller
- Ultra-low-power co-processor
- 320 kB SRAM
- 128 kB ROM
- 16 KB RTC memory
- External SPIRAM support (128 MB total)
- Up to 1 GB of external flash support
- Separate instruction and data cache
- Wi-Fi 802.11 b/g/n transceiver
- TLS 1.0, 1.1, and 1.2 support
Espressif announces the release of the ESP32-S2 Secure Wi-Fi MCU, which is a highly integrated, low-power, 2.4 GHz Wi-Fi Microcontroller SoC supporting Wi-Fi HT40 and 43 GPIOs. Based on Xtensa® single-core 32-bit LX7 processor, ESP32-S2 can be clocked at up to 240 MHz.

ESP32-S2 is a highly integrated, low-power, 2.4 GHz Wi-Fi Microcontroller SoC supporting Wi-Fi HT40 and 43 GPIOs. Based on Xtensa® single-core 32-bit LX7 processor, it can be clocked at up to 240 MHz.
With state-of-the-art power management and RF performance, IO capabilities and security features, ESP32-S2 is an ideal choice for a wide variety of IoT or connectivity-based applications, including smart home and wearables. With an integrated 240 MHz Xtensa® core, ESP32-S2 is sufficient for building the most demanding connected devices without requiring external MCUs.
By leveraging Espressif’s mature and production-ready software development framework (ESP-IDF), ESP32-S2 achieves a balance of performance and cost, thus bringing faster and more secure IoT connectivity solutions to the market.
Features
CPU And Memory
- Xtensa® single-core 32-bit LX7 microcontroller
- 7-stage pipeline
- Clock frequency of up to 240 MHz
- Ultra-low-power co-processor
- 320 kB SRAM, 128 kB ROM, 16 KB RTC memory
- External SPIRAM (128 MB total) support
- Up to 1 GB of external flash support
- Separate instruction and data cache
Connectivity
- Wi-Fi 802.11 b/g/n
- 1×1 transmit and receive
- HT40 support with data rate up to 150 Mbps
- Support for TCP/IP networking, ESP-MESH networking, TLS 1.0, 1.1 and 1.2 and other networking protocols over Wi-Fi
- Support Time-of-Flight (TOF) measurements with normal Wi-Fi packets
Read more: ESPRESSIF ANNOUNCES THE RELEASE OF ESP32-S2 SECURE WI-FI MCU
- What is the maximum clock frequency of the ESP32-S2?
The ESP32-S2 can be clocked at up to 240 MHz. - How many GPIOs does the ESP32-S2 support?
The chip supports 43 GPIOs. - Does the ESP32-S2 require an external MCU?
No, it is sufficient for building connected devices without requiring external MCUs. - What type of processor does the ESP32-S2 use?
It uses an Xtensa single-core 32-bit LX7 microcontroller with a 7-stage pipeline. - Can the ESP32-S2 support external flash memory?
Yes, it supports up to 1 GB of external flash. - What software development framework does the ESP32-S2 leverage?
It leverages Espressif's mature and production-ready software development framework known as ESP-IDF. - Does the ESP32-S2 support Time-of-Flight measurements?
Yes, it supports Time-of-Flight measurements with normal Wi-Fi packets. - What is the maximum data rate supported by the Wi-Fi HT40 feature?
The Wi-Fi HT40 support allows for data rates up to 150 Mbps.
