Is this any different then the adafruit huzzah esp8266 breakout?

This unit can be programmed directly by connecting a micro-usb cable. The huzzah esp8266 breakout requires a ftdi cable for programming. The huzzah feather is closer to this unit but costs about 20 dollars.

Does this dev board have an integrated power regulator

Yes, it has a integrated power regulator. You can supply 5V (via USB or board pin) and the system runs on 3.3V. You can even pull 3.3V off the pin(s) to your external components, or supply 3.3V on the appropriate pin.

Is it meant to be powered by the USB port?

While you can power it from any USB port, the point is after you load your code to the board it's wi-fi and can operate independently with a 5vdc power source. The ESP32 CAM modules are really cool. You can set up a 5 camera home security system for about $50.

do I just plug this into my Arduino Uno? will it work with other stacked shields?

Short answer: no. But you can get a simpler (and cheaper, incidentally) esp8266 module (not the dev board) and use it to connect your Arduino to wifi. I suppose you probably could rig this up to work, actually, but it would kind of be overkill, and would NOT work with shields. A small basic esp8266 might be able to be worked into a proto shield for what you seem to be looking for. There are several tutorials on using the esp8266-01 (this is the -12e) to connect Arduino to wifi.

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HiLetgo 3pcs ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Large)

Product ID: 170107353

Details

Brand
HiLetgo
CPU Model
MediaTek
CPU Speed
80 MHz
Memory Storage Capacity
0.5 MB
Model Name
NodeMCU LUA

⚡80 MHz CPU speed

📶Built-in Wi-Fi 802.11b connectivity

🔌Integrated Micro-USB with flash/reset switches

€ 36.70

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Description

🚀 Code smarter, connect faster, create bigger!

TRIPLE POWER PACK - Three development boards in one set to fuel multiple projects or team collaborations.
COMPACT YET MIGHTY - 80 MHz Espressif CPU with 0.5 MB memory for efficient IoT applications.
OPEN SOURCE FREEDOM - Access extensive community resources and firmware for limitless customization.
EFFORTLESS CONNECTIVITY - Built-in Wi-Fi module ensures your devices stay connected in the smart ecosystem.
PLUG PLAY PROGRAMMING - Seamlessly compatible with Arduino IDE & MicroPython for rapid prototyping.

The HiLetgo 3pcs ESP8266 NodeMCU CP2102 ESP-12E Development Boards are compact, Wi-Fi-enabled microcontroller modules featuring an 80 MHz Espressif CPU and 0.5 MB memory. Designed for seamless integration with Arduino IDE and MicroPython, these open-source boards come with built-in Micro-USB ports and flash/reset switches, empowering developers and makers to rapidly prototype IoT projects with ease and flexibility.

Specifications

ASIN	B081CSJV2V
Best Sellers Rank	#1,239 in Single Board Computers (Computers & Accessories)
Brand	HiLetgo
Built-In Media	3pcs HiLetgo ESP8266 NodeMCU CP2102 Development Module
CPU Model	MediaTek MT8125
Compatible Devices	ESP8266
Connectivity Technology	Wi-Fi
Customer Reviews	4.6 4.6 out of 5 stars (1,400)
Manufacturer	HiLetgo
Memory Storage Capacity	0.5 MB
Model Name	NodeMCU LUA ESP8266 CP2102 ESP-12E
Number of Items	3
Operating System	Minimalistic operating system or RTOS for microcontrollers
Processor Brand	Espressif
Processor Count	1
Processor Speed	80 MHz
RAM Memory Technology	LPDDR3
Total Usb Ports	1
Wireless Compability	802.11b

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€ 36.70

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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2 months ago

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