Wi-Fi Modules
34 products
Wi-Fi modules are compact communication units that enable embedded systems and microcontroller-based projects to connect to wireless networks. This category includes popular modules like ESP8266, ESP32, CC3000, ATWINC1500, as well as development board formats such as NodeMCU and Wemos D1 Mini. From IoT applications and home automation to remote data acquisition and wireless sensor networks, these modules sit at the core of countless designs.
Key Considerations When Selecting a Module
- Communication Protocol and Standard: 802.11 b/g/n support, operating frequency (2.4 GHz / 5 GHz) and security protocols (WPA/WPA2) determine network compatibility.
- Microcontroller Integration: Some modules (like ESP32) include a built-in processor and GPIOs, while others (such as ESP-01) require an external MCU and communicate via UART/SPI. Choose based on your main board architecture.
- Power Supply and Consumption: 3.3V vs 5V tolerance and deep sleep current draw are critical for battery-powered projects.
- Firmware and Library Support: Favor modules with robust library and community support on platforms like Arduino IDE, MicroPython, or ESP-IDF to speed up development.
- Antenna Option: PCB antenna, IPEX connector, or external antenna directly affect range and signal quality.
Common Pitfalls
Connecting a 3.3V module directly to a 5V supply is the most frequent mistake; always verify the operating voltage. Insufficient current from the power source can cause intermittent disconnections—ensure your supply can deliver at least 500 mA. Incorrect baud rate or malformed AT commands during initial setup often result in unresponsive modems. Stick to the module documentation and test step by step.
