Espressif ESP32 User Manual

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2. Environment Setup
The hardware connection for ESP-WROOM-32 is shown in Figure 2-2. To enable its
downloading mode, connect ESP-WROOM-32's GPIO0 to GND. After downloading, leave
GPIO0 floating and restart the module to enable its working mode.
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Figure 2-2. Hardware Connection for ESP-WROOM-32
2.3. Software Installation
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Download and install the EspRFtestTool.
• Install the software components of the RF tester (IQView).
Espressif
! /!4 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