Espressif ESP32 User Manual

About This Guide
This guide demonstrates how to run an RF performance tests on ESP8266 and ESP32
devices with an RF tester. ESP-WROOM-02 and ESP-WROOM-32 are used as examples
in this document.
Release Notes
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Date
Version
Release notes
2017.12
V1.0
First release
2018.03
V2.0
Major revision: An RF test tool is used to run the tests

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