Espressif ESP32 User Manual

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2. Environment Setup
2.1.2. Software Preparation
2.2. Hardware Connection
•
Connect the SMA (SubMiniature version A) RF head to the antenna of the DUT. Users
should cut off the PCB antenna of the DUT after soldering the RF cable to it; otherwise,
the test results will be inaccurate.
•
Connect the demo board and the PC via a micro-USB cable. For instructions on how to
install the UART driver on the PC, please refer to Appendix Ⅰ.
• Use Dupont lines to connect the backplane's GND, TXD and RXD pins to the demo
board's GND, TXD and RXD pins, respectively.
The hardware connection for ESP-WROOM-02 is shown in Figure 2-1. To enable its
downloading mode, connect ESP-WROOM-02's GPIO0 and GPIO15 to GND. After
downloading, leave GPIO0 floating and restart the module to enable its working mode.
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Figure 2-1. Hardware Connection for ESP-WROOM-02
Table 2-2. Software Preparation
Name
Description
ft232r-usb-uart.zip
USB-UART converter driver
RF test tool
(EspRFtestTool)
This is a program that integrates the downloading and running of the test firmware.
Espressif
! /!3 19
2018.03

Espressif ESP32 Specifications

General

Clock Speed	Up to 240 MHz
SRAM	520 KB
Wi-Fi	802.11 b/g/n
Bluetooth	Bluetooth v4.2 BR/EDR and BLE
GPIO Pins	34
Operating Voltage	2.2V to 3.6V
Operating Temperature	-40°C to +125°C
Processor	Tensilica Xtensa LX6
Flash Memory	4MB (varies by module)
ADC	12-bit SAR ADC up to 18 channels
DAC	2 channels of 8-bit DACs
I2C	2 x I2C
I2S	2 x I2S
Interfaces	CAN 2.0
SPI	4 SPI interfaces
UART	3 x UART