User's Guide

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1. Introduction
1. Introduction
1.1. ESP-WROOM-32D
ESP-WROOM-32D is a powerful, generic Wi-Fi+BT+BLE MCU module that 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-D0WD chip*.
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 $\mu$A,
making it suitable for battery powered and wearable electronics applications. ESP32
supports a data rate of up to 150 Mbps, and 20.5 dBm output power at the antenna to
ensure the widest physical range. As such the chip 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 developers can continually upgrade their products even after their
release.
1.2. ESP-IDF
The Espressif IoT Development Framework (ESP-IDF for short) is a framework for
developing applications based on the Espressif ESP32. Users can develop applications in
Windows/Linux/MacOS based on ESP-IDF. It is recommended to use Linux distribution.
Lubuntu 16.04 has been used as an example in this document for illustration purposes.
1.3. Preparation
To develop applications for ESP-WROOM-32D you need:
• PC loaded with either Windows, Linux or Mac operating system
•
Toolchain to build the Application for ESP32
• ESP-IDF that essentially contains API for ESP32 and scripts to operate the Toolchain
•
A text editor to write programs (Projects) in C, e.g. Eclipse
• The ESP32 board itself and a USB cable to connect it to the PC
Espressif
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2017.11