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Product Overview

ESP32-S2 family is a highly-integrated, low-power, 2.4 GHz Wi-Fi System-on-Chip (SoC) solution. With its state-of-the-art power and RF performance, this SoC is an ideal choice for a wide variety of application scenarios relating to Internet of Things (IoT), wearable electronics and smart home.

ESP32-S2 family includes a Wi-Fi subsystem that integrates a Wi-Fi MAC, Wi-Fi radio and baseband, RF switch, RF balun, power amplifier, low noise amplifier (LNA), etc. The chip is fully compliant with the IEEE 802.11b/g/n protocol and offers a complete Wi-Fi solution.

At the core of this chip is an Xtensa® 32-bit LX7 CPU that operates at up to 240 MHz. The chip supports application development, without the need for a host MCU.

The on-chip memory includes 320 KB SRAM and 128 KB ROM. It also supports multiple external SPI/QSPI/OSPI flash and external RAM chips for more memory space.

ESP32-S2 family is designed for ultra-low-power applications with its multiple low-power modes. Its featured fine-grained clock gating, dynamic voltage and frequency scaling, and adjustable power amplifier output power, contribute to an optimal trade-off between communication range, data rate and power consumption.

The device provides a rich set of peripheral interfaces including SPI, I2S, UART, I2C, LED_PWM, LCD interface, camera interface, ADC, DAC, touch sensor, temperature sensor, as well as 43 GPIOs. It also includes a full-speed USB On-The-Go (OTG) interface to enable USB communication.

ESP32-S2 family has several dedicated hardware security features. Cryptographic accelerators are integrated for AES, SHA and RSA algorithms. Additional hardware security features are provided by the RNG, HMAC and Digital Signature modules as well as flash encryption and secure boot signature verification features. These features allow the device to meet stringent security requirements.

Block Diagram


• IEEE 802.11 b/g/n-compliant
• Supports 20 MHz, 40 MHz bandwidth in 2.4 GHz band
• Single-band 1T1R mode with data rate up to 150 Mbps
• Immediate Block ACK
• Fragmentation and defragmentation
• Automatic Beacon monitoring (hardware TSF)
• 4 × virtual Wi-Fi interfaces
• Simultaneous support for Infrastructure Station, SoftAP, and Promiscuous modes
Note that when ESP32-S2 family is in Station mode and performs a scan, the SoftAP channel will change along with the Station channel.
• Antenna diversity
• 802.11mc FTM

CPU and Memory
• Xtensa® single-core 32-bit LX7 microprocessor, up to 240 MHz
• 128 KB ROM
• 320 KB SRAM
• 16 KB SRAM in RTC
• Embedded flash and PSRAM
• SPI/QSPI/OSPI supports multiple flash and external RAM chips

Advanced Peripheral Interfaces
• 43 × programmable GPIOs
• 2 × 13-bit SAR ADCs, up to 20 channels
• 2 × 8-bit DAC
• 14 × touch sensing IOs
• 4 × SPI
• 1 × I2S
• 2 × I2C
• 2 × UART
• LED PWM controller, up to 8 channels
• 1 × full-speed USB OTG
• 1 × temperature sensor
• 1 × DVP 8/16 camera interface, implemented using the hardware resources of I2S
• 1 × LCD interface (8-bit serial RGB/8080/6800), implemented using the hardware resources of SPI2
• 1 × LCD interface (8/16/24-bit parallel), implemented using the hardware resources of I2S
• 1 × TWAI® controller compatible with ISO 11898-1 (CAN Specification 2.0)

• Secure boot
• Flash encryption
• 4096-bit OTP, up to 1792 bits for users
• Cryptographic hardware acceleration:
– AES-128/192/256 (FIPS PUB 197)
– Hash (FIPS PUB 180-4)
– Random Number Generator (RNG)
– Digital signature

Applications (A Non-exhaustive List)
• Generic Low-power IoT Sensor Hubs
• Generic Low-power IoT Data Loggers
• Cameras for Video Streaming
• Over-the-top (OTT) Devices
• USB Devices
• Speech Recognition
• Image Recognition
• Mesh Networks
• Home Automation
– Light control
– Smart plugs
– Smart door locks
• Smart Buildings
– Smart lighting
– Energy monitoring
• Industrial Automation
– Industrial wireless control
– Industrial robotics
• Smart Agriculture
– Smart greenhouses
– Smart irrigation
– Agriculture robotics
• Audio Applications
– Internet music players
– Live streaming devices
– Internet radio players
– Audio headsets
• Health Care Applications
– Health monitoring
– Baby monitors
• Wi-Fi-enabled Toys
– Remote control toys
– Proximity sensing toys
– Educational toys
• Wearable Electronics
– Smart watches
– Smart bracelets
• Retail & Catering Applications
– POS machines
– Service robots
• Touch Sensing Applications
– Waterproof design
– Distance sensing applications
– Linear slider, wheel slider designs


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