ESP32 WiFi + BL Dual-core CPU IoT

ESP-WROOM-32 is a general-purpose Wi-Fi + BT + BLE MCU module. It is powerful and versatile. It can be used for low-power sensor networks and demanding tasks such as voice encoding, audio streaming, and MP3. Decoding etc.

CPU and memory:
ESP32-D0WDQ6 includes two low-power Xtensa; 32-bit LX6 MCUs. On-chip storage includes:
a. 448 KB of ROM for program startup and kernel function calls.
b. 520 KB of on-chip SRAM for data and instruction storage.
c. 8 KB of SRAM in RTC, that is, RTC slow memory, can be accessed by the coprocessor in Deep-sleep mode.
d. 8 KB of SRAM in RTC, that is, RTC fast memory, can be used for data storage and accessed by the main CPU when RTC starts in Deep-sleep mode.
e. 1 kbit eFuse, of which 256 bits are dedicated to the system (MAC address and chip settings); the remaining 768 bits are reserved for user applications. These applications include flash encryption and chip ID.
f. ESP-WROOM-32 integrates 4MB SPIFlash

The core of this module is the ESP32-D0WDQ6 chip *, which is scalable and adaptive. The two CPU cores can be controlled or powered on separately. The clock frequency can be adjusted from 80 MHz to 240 MHz. The user can cut off the power of the CPU and use a low-power coprocessor to continuously monitor the status change of the peripheral or whether certain analog quantities exceed the threshold. ESP32 also integrates a variety of peripherals, including capacitive touch sensors, Hall sensors, low-noise sensor amplifiers, SD card interfaces, Ethernet interfaces, high-speed SDIO / SPI, UART, I2S, and I2C.