This is ESP WROOM 32 targets a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music streaming, and MP3 decoding.

At the core of this module is the ESP32 chip, which is designed to be scalable and adaptive. There are 2 CPU cores that can be individually controlled or powered, and the clock frequency is adjustable from 80 MHz to 240 MHz.

The user may also power off the CPU and make use of the low-power coprocessor to constantly monitor the peripherals for changes or crossing of thresholds. ESP32 integrates a rich set of peripherals, ranging from capacitive touch sensors, Hall sensors, low-noise sense amplifiers, SD card interface, Ethernet, high-speed SDIO/SPI, UART, and I²C.

Using Bluetooth, users can connect to their phone or broadcast low energy beacons for its detection. The use of Wi-Fi enables a large physical range, as well as a direct connection to the internet via a Wi-Fi router. Perfect for wearable electronic or battery powered applications, the ESP32 chip uses less than 5µA.

In addition, this module can support data rates of up to 150 Mbps and 22 dBm output power at the PA in order to allow for the widest physical range.

Specifications:

• Manufacturer: Espressif
• Protocol Supported: 802.11 b/g/n
• Frequency: 2.4 GHz to 2.5 GHz
• Protocol - WiFi - 802.11: WiFi
• Protocol - Bluetooth: Bluetooth v4.2 BR/EDR and BLE specification
• Series: ESP32
• Module Interfaces: SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC
• On-chip Sensor: Hall sensor
• Integrated Crystal: 40 MHz crystal
• Integrated SPI flash: 4MB
• Operating Voltage/Power Supply: 3V ~ 5V
• Operating Current Average: 80 mA
• Minimum Current Delivered by Power Supply: 500 mA
• Operating Temperature: –40 °C ~ +85 °C
• Moisture Sensitivity Level (MSL): Level 3
• Dimensions: 54.4 x 27.9mm
• Weight: 10g

Comparison:

Key Applications:

• ESP32: A powerful, dual-core microcontroller suitable for applications needing both Wi-Fi and Bluetooth Classic/BLE support. Ideal for general-purpose IoT.
• ESP32-S2: A low-power single-core option without Bluetooth but with USB OTG support, making it suitable for battery-powered IoT devices and USB-based applications.
• ESP32-S3: A high-performance dual-core option with AI/ML capabilities, improved Bluetooth 5.0, and USB OTG, designed for edge computing and AIoT applications.