The chip used by ESP32-WROVER-B is ESP32-D0WD of the ESP32 series. The ESP32-D0WD chip has the characteristics of scalability and adaptability. The two CPU cores can be controlled separately. The adjustment range of the CPU clock frequency is from 80 MHz to 240 MHz. The user can turn off the power of the CPU and use a low-power coprocessor to monitor the status changes of peripherals or whether certain analog quantities exceed the threshold. ESP32 also integrates a wealth of peripherals, including capacitive touch sensors, Hall sensors, SD card interface, Ethernet interface, high-speed SPI, UART, I2S and I2C.
The integration of Bluetooth®, Bluetooth LE and Wi-Fi ensures that a wide range of applications can be targeted and that the module is all-around: using Wi-Fi allows a large physical range and direct connection to the Internet through a Wi-Fi router while using Bluetooth allows the user to conveniently connect to the phone or broadcast low energy beacons for its detection.
The sleep current of the ESP32 chip is less than 5 µA, making it suitable for battery-powered and wearable electronics applications. The module supports a data rate of up to 150 Mbps and 20 dBm output power at the antenna to ensure the widest physical range. As such the module does offer industry-leading specifications and the best performance for electronic integration, range, power consumption and connectivity.
The operating system chosen for ESP32 is freeRTOS with LwIP; TLS 1.2 with hardware acceleration is built-in as well. Secure (encrypted) over the air (OTA) upgrade is also supported so that users can upgrade their products even after their release, at minimum cost and effort.
