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 speed

📶100m+ Wi-Fi & BLE5.0 range

🔋Ultra-low 44μA deep sleep power

Description

🚀 Tiny Board, Giant IoT Impact — Power Your Edge AI Revolution!

EDGE AI READY - 11 digital + 4 analog I/O with UART/IIC/SPI/IIS support, optimized for TinyML and next-gen smart devices.
COMPACT YET CAPABLE - Thumb-sized 21x17.5mm footprint with rich I/O ports—perfect for sleek, production-ready designs.
POWERHOUSE RISC V CORE - 160MHz processing for lightning-fast IoT and edge AI performance.
BATTERY SMART EFFICIENCY - Deep sleep mode at just 44μA plus onboard Li-ion/LiPo charging for all-day wearable freedom.
UNMATCHED WIRELESS REACH - U.FL antenna delivers stable Wi-Fi & BLE connectivity beyond 100 meters—stay connected anywhere.

The Seeed Studio XIAO ESP32C3 is a compact, production-ready microcontroller board featuring a 160MHz 32-bit RISC-V CPU, ultra-low power consumption with deep sleep at 44μA, and robust long-range Wi-Fi/BLE5.0 connectivity via an external U.FL antenna. Designed for IoT and edge AI applications, it supports Arduino and CircuitPython, offers 11 digital and 4 analog I/O ports, and includes onboard battery charging for Li-ion/LiPo batteries—making it the ultimate tiny powerhouse for wearable and wireless smart 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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