Espressif ESP32 User Guide

2. Getting Started
2.1.4.
Uploading Firmware
1.
Power on the board with 5V/1A power.
2.
Connect the development board to a PC.
3.
Toggle 8-digit Toggle Switch to the Download Boot as Table 1-2.
4.
Install Minicom.
sudo apt-get install minicom
5.
Run Minicom.
sudo minicom -s
6.
Configure the items as Figure 2-2.
Figure 2-2. Configuration items of Minicom
Note：
If your project is successfully compiled, the irom1.bin, irom0_flash.bin, and user.ota files will be
generated in /Workspace/ESP32_BIN directory. Current contents of /Workspace/ESP32_BIN
directory is shown as Table2-1.
Table 2-1. ESP32_BIN Directory Files
File Name
Description
blank.bin
•
Provided with the SDK.
•
Used to initialize the system parameters.
boot.bin
•
Provided with the SDK.
•
Main program.
irom1.bin
•
Generated from compiling.
•
Main program.
irom0_flash.bin
•
Generated from compiling.
•
Main program.
User.ota
•
Generated from compiling.
•
Main program.
•
Don’t need to be uploaded, and will be updated by OTA.
Espressif
2015.12
Confidential

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