According to google esp32 can support 3 uart connections but the specs for this device says one uart. does that mean i can only have 1 uart sensor? i

This is a ESP32, but it is also quite a lot like an ESP8266.

Seeed Studio XIAO ESP32C3 - Tiny MCU Board with Wi-Fi and BLE for IoT Controlling Scenarios. Microcontroller with Battery Charge, Power Efficient, and Rich Interface for Tiny Machine Learning. …

Seeed Studio XIAO ESP32C3 - Tiny MCU Board with Wi-Fi and BLE for IoT Controlling Scenarios. Microcontroller with Battery Charge, Power Efficient, and Rich Interface for Tiny Machine Learning. …

Product ID: 574539028

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Details

Brand
seeed studio
CPU speed
160 MHz
Memory storage capacity
4 MB
Model name
XIAO ESP32C3
RAM memory installed size
0.4 MB

⚡160MHz RISC-V CPU

📶100m+ Wi-Fi/BLE range

🔋44μA deep sleep power

Description

🚀 Tiny Board, Giant Leap for Your IoT Projects!

PLUG PLAY VERSATILITY - Supports Arduino & CircuitPython with rich I/O (11 digital + 4 analog) and multiple serial ports for seamless prototyping.
BATTERY SMART EFFICIENCY - Ultra-low power modes with onboard Li-ion/LiPo charging keep your projects running longer and greener.
UNMATCHED WIRELESS REACH - U.FL antenna ensures rock-solid Wi-Fi and Bluetooth 5 connectivity beyond 100 meters—stay connected, always.
DESIGNED FOR THE FUTURE OF IO T - Optimized for TinyML and edge computing, this board is your gateway to next-gen smart wearables and devices.
POWERHOUSE IN A THUMB SIZED PACKAGE - 160MHz 32-bit RISC-V chip delivers blazing-fast edge AI and IoT performance without bulk.

The Seeed Studio XIAO ESP32C3 is a compact 21x17.5mm microcontroller board powered by a 160MHz 32-bit RISC-V ESP32-C3 chip. It features ultra-low power consumption with deep sleep current as low as 44μA, integrated battery charging for Li-ion/LiPo batteries, and a U.FL antenna for stable Wi-Fi and Bluetooth 5 connectivity over 100 meters. With 11 digital and 4 analog I/O pins plus multiple serial interfaces, it supports Arduino and CircuitPython, making it ideal for IoT, edge AI, and TinyML applications in wearables and portable devices.

Specifications

ASIN	B0B94JZ2YF
Best Sellers Rank	61,896 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 232 in Microcontrollers
Box Contents	/
Brand	seeed studio
Brand Name	seeed studio
CPU speed	160 MHz
Compatible Devices	Wi-Fi and Bluetooth enabled devices
Connectivity technology	Wi-Fi
Customer Reviews	4.5 out of 5 stars 707 Reviews
Item Dimensions L x W x H	5L x 4W x 3H centimetres
Manufacturer	seeed studio
Manufacturer Part Number	ESP32-C3
Memory Storage Capacity	4 MB
Memory storage capacity	4 MB
Model Name	XIAO ESP32C3
Model Number	ESP32-C3
Model name	XIAO ESP32C3
Network Connectivity Technology	Wi-Fi
Operating System	Arduino
Processor Brand	Espressif
Processor Count	1
Processor Speed	160 MHz
RAM Memory Installed	0.4 MB
RAM Memory Technology	LPDDR2, DDR2
RAM memory installed size	0.4 MB
Total USB Ports	1
Unit Count	1.0 count
Wireless Compability	Bluetooth

Reviews

N**I

Perfect

It's a great little board. Now even easier to program using ChatGPT.

19.12.2025

S**E

Excellent

Excellent product and seller

7.06.2025

M**E

Tiny But Mighty

Powerful but tiny microcontroller. The built-in battery management makes it ideal for stand-alone digital electronics projects.

13.04.2025

K**Y

It has 8MB RAM, NOT 32GB!

It's tiny, but powerful, BUT IT HAVE ONLY 8MB RAM!!! Please fix the description!

14.11.2025

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