ESP32-S2-SOLO and ESP32-S2-SOLO-U are two powerful, generic Wi-Fi MCU modules that have a rich set of peripherals. They are an ideal choice for a wide variety of application scenarios relating to Internet of Things (IoT), wearable electronics and smart home.
ESP32-S2-SOLO comes with an on-board PCB antenna, and ESP32-S2-SOLO-U with an external antenna connector. Both ESP32-S2-SOLO and ESP32-S2-SOLO-U have three variants:
• integrating the ESP32-S2 chip (which has no embedded flash and PSRAM), and a flash that operates at –40 ~ 85 °C
• integrating the ESP32-S2 chip (which has no embedded flash and PSRAM), and a flash that operates at –40 ~ 105 °C
• integrating the ESP32-S2R2 chip (which is embedded with a 2 MB PSRAM) , and a flash that operates at –40 ~ 85 °C
The three variants differ in the chip integrated and the ambient operating temperature. In this datasheet unless otherwise stated, ESP32-S2-SOLO refers to all variants of ESP32-S2-SOLO, whereas ESP32-S2-SOLO-U refers to all variants of ESP32-S2-SOLO-U. The ESP32-S2 chip and the ESP32-S2R2 chip falls into the same category, namely ESP32-S2 series. ESP32-S2 series of chips has an Xtensa® 32-bit LX7 CPU that operates at up to 240 MHz. It has a low-power co-processor that can be used instead of the CPU to save power while performing tasks that do not require much computing power, such as monitoring of peripherals.
ESP32-S2 integrates a rich set of peripherals, ranging from SPI, I2S, UART, I2C, LED PWM, TWAI®, LCD, Camera interface, ADC, DAC, touch sensor, temperature sensor, as well as up to 43 GPIOs. It also includes a full-speed USB On-The-Go (OTG) interface to enable USB communication.
The ESP32-S2 chip and the ESP32-S2R2 chip vary only in whether a PSRAM is embedded.
Key Benefits
- 2.4 GHz Wi-Fi module
- ESP32-S2FH4 or ESP32-S2FN4R2 embedded, Xtensa® single-core 32-bit LX7 microprocessor, up to 240 MHz
- Support IEEE 802.11 b/g/n standards
- 2 MB PSRAM (ESP32-S2R2 only)
- 4 MB SPI flash
- 40 MHz crystal oscillator
- On-board PCB antenna (ESP32-S2-SOLO)
- External antenna via a connector (ESP32-S2-SOLO-U)
- Operating ambient temperature –40 ~ 105 °C
