ET-Board Development Board Pinout and Technical Specifications

Code name: ET-Board

ET-Board development board is based on esp32 microcontroller and uses xtensa architecture. This development board has a maximum CPU frequency of 240 MHz and a flash size of 4MB.

Features

40 digital IO pins
16 external interrupt pins
7 analog input pins
18 PWM pins

Connectivity

WiFi: 802.11 b/g/n (2.4 GHz)
Bluetooth: 4.2
WiFi: 4.2

Technical specs

Clock Speed	240 MHz
Flash size	4MB
Microcontroller	esp32
Architecture	xtensa

ET-Board Pins Mapping Arduino IDE

Below you can find the ET-Board pinout. This development board provides 40 digital IO pins, out of which 16 can be used as an external interrupt pins , 7 as analog input pins and 18 pins have Pulse-Width Modulation (PWM) .

Pin	Analog	PWM	Other
4		PWM
5		PWM	LED_BUILTIN
12		PWM
13		PWM
14		PWM
15		PWM
16		PWM
17		PWM
21		PWM	SDA
22		PWM	SCL
25	A6	PWM	DAC1
26	A7	PWM	DAC2
27		PWM
29		PWM	SS
30		PWM	SCK
31		PWM	MISO
32	A2	PWM
33	A3	PWM
34	A4		TX
35	A5		RX
36	A0
37			MOSI
39	A1

Analog - Analog input pins

Touch - Touch pins

Function - Function pins

RX / TX - Receive (RX) / Transmit (TX)

LED_BUILTIN - Built-in LED

PWM - Pulse-Width Modulation

Default Tools

Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	0x1000
Flash mode	dio
Boot mode	dio
PSRAM type
Maximum upload size	1280 Kb (1310720 B)
Maximum data size	320 Kb (327680 B)

The ET-Board development board by default uses esptool_py uploader tool, esp_ota network uploader tool for Over-the-air (OTA) uploads and esptool_py bootloader tool. The bootloader starts at address "0x1000". Flash mode and boot mode for ET-Board development board by default is dio and dio respectively. When using Arduino IDE, the maximum sketch upload size is 1280 Kb (1310720 B) and maximum data size for variables is 320 Kb (327680 B).