ESP32S3 Walter Module Development Board Pinout and Technical Specifications

Code name: ESP32S3_DEV

Manufacturer: QuickSpot

ESP32S3 Walter Module development board is based on esp32s3 microcontroller and uses xtensa architecture. This development board has a maximum CPU frequency of 240 MHz and a flash size of 16MB.

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ESP32S3 Walter Module Description

Walter is a small, highly integrated IoT module built to tackle complex connectivity and processing needs. At its core is the ESP32-S3, a versatile system-on-chip (SoC) featuring a dual-core processor with hardware acceleration for machine learning, cryptography, and signal processing. It includes a range of peripherals, such as UART, SPI, I²C, and CAN, alongside built-in Wi-Fi b/g/n and Bluetooth 5, providing robust local networking and communication options.

What sets Walter apart is its inclusion of the Sequans GM02SP modem, offering LTE-M and NB-IoT 5G connectivity for low-power, wide-area communication, ideal for IoT applications. The modem also integrates a GNSS receiver, adding precise positioning capabilities for tasks like asset tracking, navigation, or geolocation.

ESP32S3 Walter Module Specs

Below you can find the specifications of ESP32S3 Walter Module, such as features, connectivity options, and ESP32S3 Walter Module technical specs.

Features

LTE: CAT M1/NB1/NB2 (GM02SP module)
GPS: GPS, GNSS Constellation support (GM02SP module)
Ultra low deep sleep current of 9.8µA
Certified for CE, FCC, IC, UKCA, New-Zealand and Australia
24 digital IO pins
22 external interrupt pins
22 analog input pins
22 PWM pins

Connectivity

WiFi: 802.11 b/g/n (2.4 GHz)
Bluetooth: 5.0
WiFi: 5.0
LTE: CAT M1/NB1/NB2

Technical specs

Clock Speed	240 MHz
Flash size	16MB
Microcontroller	esp32s3
Architecture	xtensa

ESP32S3 Walter Module Pinout

ESP32S3 Walter Module External Pins Mapping Functions

Below you can find the ESP32S3 Walter Module pinout. This development board provides 24 digital IO pins, out of which 22 can be used as an external interrupt pins , 22 as analog input pins and 22 pins have Pulse-Width Modulation (PWM) .

Pin	Function	ESP Pin	Input/Output	Description
1	RESET	EN	input	ESP32 reset with 10k pullup
2	IO44/RX0	RXD0	bidirectional	ESP32 UART0 Receive
3	IO43/TX0	TXD0	bidirectional	ESP32 UART0 Transmit
4	DFU/3V3 EN	IO0	bidirectional	DFU when low on boot and 3V3 output enable
5	IO12	IO12	bidirectional	General purpose I/O
6	IO11	IO11	bidirectional	General purpose I/O
7	IO13	IO13	bidirectional	General purpose I/O
8	IO38	IO38	bidirectional	General purpose I/O
9	IO39	IO39	bidirectional	General purpose I/O
10	IO40	IO40	bidirectional	General purpose I/O
11	IO41	IO41	bidirectional	General purpose I/O
12	IO42	IO42	bidirectional	General purpose I/O
13	IO2	IO2	bidirectional	General purpose I/O
14	IO1	IO1	bidirectional	General purpose I/O
15	IO4	IO4	bidirectional	General purpose I/O
16	IO5	IO5	bidirectional	General purpose I/O
17	IO6	IO6	bidirectional	General purpose I/O
18	IO7	IO7	bidirectional	General purpose I/O
19	IO15	IO15	bidirectional	General purpose I/O
20	IO16	IO16	bidirectional	General purpose I/O
21	IO17	IO17	bidirectional	General purpose I/O
22	IO18	IO18	bidirectional	General purpose I/O
23	IO8	IO8	bidirectional	General purpose I/O
24	IO9	IO9	bidirectional	General purpose I/O
25	IO10	IO10	bidirectional	General purpose I/O
26	3V3 OUT	N/A	power output	Switchable 3.3VDC output
27	GND	GND	power ground	GND connection
28	VIN	N/A	power input	DC Power input port

Function - Pin Function

ESP Pin - Pin on ESP32

Input/Output - Input or Output Pin

Description - Pin Description

Default Tools

Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	0x0
Flash mode	dio
Boot mode	qio
PSRAM type	qspi

The ESP32S3 Walter Module 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 "0x0". Flash mode and boot mode for ESP32S3 Walter Module development board by default is dio and qio respectively. The board uses qspi PSRAM type.