ESP8266 / ESP32 Serial WiFi Module — NodeMCU, Wemos D1 Mini, ESP-01S, for Arduino & IoT

ESP8266 / ESP32 Serial WiFi Wireless Module — NodeMCU, Wemos D1 Mini, ESP-01S

This product line covers the most popular ESP8266 and ESP32 WiFi modules for Arduino and IoT development. Whether you need a compact ESP-01S for AT command WiFi bridging, a NodeMCU V3 for full standalone development, or a Wemos D1 Mini for compact IoT builds, all variants are fully supported by the Arduino IDE and MicroPython.

Module Variants & Key Specs

Module	Chip	Flash	GPIO	Notes
ESP-01S	ESP8266	1MB	2	AT command WiFi bridge, UART interface
NodeMCU V3	ESP8266 (ESP-12E)	4MB	11	CH340G USB, breadboard-friendly
Wemos D1 Mini	ESP8266	4MB	11	Compact, shield ecosystem
ESP32 DevKit V1	ESP32 dual-core	4MB	30+	WiFi + Bluetooth, 240MHz
ESP32-CAM	ESP32-S	4MB	10	OV2640 camera, microSD slot

Common Specifications (ESP8266)

• WiFi Standard: 802.11 b/g/n, 2.4GHz
• Operating Voltage: 3.3V
• Operating Temperature: -40°C to +80°C
• Programming: Arduino IDE, MicroPython, AT commands
• Protocol Support: TCP/IP, HTTP, MQTT, WebSocket

Why Choose ESP8266 / ESP32?

• ✅ Arduino IDE compatible — install ESP8266/ESP32 board package and start coding
• ✅ Built-in WiFi — no external WiFi shield needed
• ✅ Large community — thousands of libraries and tutorials available
• ✅ Low cost — most affordable WiFi-enabled MCU platform
• ✅ OTA update support — update firmware over WiFi without USB

Typical Applications

• IoT sensor data upload to cloud (MQTT, HTTP)
• Home automation (smart switch, thermostat, door sensor)
• WiFi-controlled LED strips and relays
• Web server on ESP8266 / ESP32
• ESP32-CAM security camera and face detection
• AT command WiFi bridge for Arduino Uno / Mega

Package Contents

• 1 × ESP8266 or ESP32 WiFi Module (variant as selected)

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