Cytron ESP8266 WiFi Shield V2.0 W/ Micro SD Card Slot For Arduino Uno | High-Performance IoT Wireless Expansion Board

Description

The Cytron ESP8266 WiFi Shield V2.0 W/ Micro SD Card Slot For Arduino Uno is a professional-grade wireless expansion board designed to seamlessly bring Internet of Things (IoT) connectivity to the standard Arduino ecosystem. Featuring the pre-assembled, industrial-standard ESP-WROOM-02 (ESP8266-12 based) module, this shield eliminates the complex level-shifting, intricate wiring, and tedious breadboarding typically required to interface standard 3.3V ESP modules with 5V microcontrollers.

Engineered for modularity and ease of deployment, the shield features standard Arduino R3 layout compatibility, stacking directly onto an Arduino Uno, Mega 2560, Leonardo, or compatible mainboard. The onboard hardware features flexible mini-jumpers that allow developers to route UART/Serial communication to hardware serial pins (D0/D1), direct USB-to-Serial lines for immediate ESP8266 flashing, or a wide selection of digital pins for Software Serial configurations. Pre-flashed with stable AT-command firmware while breaking out crucial ESP8266 I/O pins, this shield offers an incredibly adaptable foundation for developing connected embedded devices, remote data loggers, and web-controlled robotics platforms.

Note: Product images are for reference only. For stable network operations under high transmission loads, ensure the host Arduino is powered by a high-quality external DC power source capable of feeding the onboard 500mA regulator.

Key Features

• Pre-Assembled ESP-WROOM-02 Core: Certified WiFi module offering stable 802.11 b/g/n connectivity with an integrated TCP/IP protocol stack.
• Configurable UART Routing: Onboard mini-jumpers enable quick hardware selection between Direct USB flashing, Hardware Serial (D0/D1), or multiple Software Serial pins (D2, D3, D8–D13).
• Integrated Storage Expansion: Features a built-in Micro SD card slot, ideal for local data caching, web asset hosting, and IoT data logging applications.
• Robust Power Delivery: Onboard high-efficiency 3.3V voltage regulator delivers up to 500mA of continuous current, ensuring transmission stability during peak WiFi power bursts (+19.5dBm).
• Standard R3 Form Factor: Stackable mechanical layout fits seamlessly onto Arduino UNO R3, Mega 2560, Leonardo, and CT-UNO platforms without external jumper wires.
• Flexible Firmware Support: Works right out of the box using robust AT-command libraries, or allows completely custom firmware compilation directly via the broken-out ESP8266 IO channels.

Benefits

• Plug-and-Play Simplicity: Accelerates development timelines by bypassing manual soldering, power level shifting, and discrete component selection.
• Advanced RF Performance: Fully integrated TR switch, balun, LNA, power amplifier, and matching networks maximize signal integrity and transmission distance.
• Versatile Network Topology: Native support for Wi-Fi Direct (P2P) and Soft-AP modes allows flexible device-to-device interaction without an external router.
• Simplified Diagnostics: Clean silkscreen documentation and jumper configurations enable rapid debugging and hardware re-allocation during cross-platform porting.

Applications

• Internet of Things (IoT) Edge Nodes: Perfect for connecting legacy embedded installations to cloud services and remote databases.
• Environmental Data Logging: Enables sensor-rich telemetry platforms to simultaneously save logs to a Micro SD card and stream them to remote dashboards.
• Wireless Robotics & Telemetry: Provides an affordable, high-speed control link for web-dashboard-driven robotic platforms and autonomous rovers.
• Industrial Automation & Monitoring: A dependable solution for deploying small-scale standalone web servers, remote gateway interfaces, and smart automated fixtures.

Package Includes

• 1 x Cytron ESP8266 WiFi Shield V2.0 W/ Micro SD Card Slot For Arduino Uno

Specifications