15 November 2017
Telecoms, Datacoms, Wireless, IoT
Espressif Systems’ ESP-WROOM-32U is a powerful, generic Wi-Fi plus Bluetooth plus Bluetooth low energy (BLE) microcontroller module that targets a wide variety of applications, ranging from low-power sensor networks to demanding tasks such as voice encoding, music streaming and MP3 decoding.
At the core of this module is the ESP32-D0WD chip, designed to be scalable and adaptive. There are two CPU cores that can be individually controlled, 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, including capacitive touch sensors, Hall sensors, low-noise sense amplifiers, SD card interface, Ethernet, 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 future proof: 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. It supports a data rate of up to 150 Mbps, and 20.5 dBm output power at the antenna to ensure the widest physical range. The ESP32-WROOM-32U module integrates a U.FL connector.
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