Description of ESP8266 ESP 12F 4 Channel Wifi IoT Smart Switch ESP8266 ESP-12F 4 Channel Wifi IoT Smart Switch The ESP-12F WiFi 4-Channel Relay Module is a highly integrated solution for smart home automation and IoT applications. Built on the reliable ESP8266 ESP-12F WiFi module, this relay board enables wireless control of up to four AC or DC loads via mobile apps or microcontroller-based systems. Designed with a robust AC-DC power module and secondary development in mind, it supports Arduino IDE, ECLIPSE, and other development platforms. Key Features Built-in stable ESP-12F WiFi module with 4MB flash memory. All GPIO and UART ports are broken out for easy secondary development. Wide power input support: AC 90–250V / DC 7–30V / 5V. Onboard reset button for the ESP module. Compatible with Arduino IDE, ECLIPSE, and other development tools. 4-channel 5V relays support up to AC250V or DC30V switching. Onboard power LED, programmable LED, and relay status indicators. Technical Specifications: Parameter Specification AC Power Supply 90–250V DC Power Supply 7–30V or 5V WiFi Module Built-in ESP-12F with 4MB Flash Memory I/O and UART Access All ports are accessible via headers Power Supply Module Onboard AC-DC switching module Development Support Compatible with Arduino IDE Relay Output 5V relays control AC/DC loads up to 10A Indicators Power LED, 1 programmable LED, relay indicators Board Dimensions 93mm × 88mm Interface Description Programming Port: Connect GND, RX, TX, and 5V of ESP8266 to external TTL serial port (GND to GND, TX to RX, RX to TX, 5V to 5V) Connect IO0 to GND during programming, then disconnect after upload Relay Output: NC (Normally Closed): Connected to COM before relay activation COM (Common): Relay common terminal NO (Normally Open): Connected to COM after relay activation GPIO Pinout: All standard GPIOs of ESP8266 are accessible via headers for custom functionality or sensor integration Program Download Guide Connect IO0 to GND using jumper wires or caps Use a TTL-to-USB adapter (e.g., FT232) and connect to PC Connect to the board: GND↔GND, TX↔RX, RX↔TX, 5V↔5V Select the correct COM port and board type in Arduino IDE Click "Upload"; the code will compile and transfer to the board After upload, disconnect IO0 from GND and reset the board Applications Smart home device control Wireless industrial automation IoT-based switching systems Remote ON/OFF control Security and access automation Smart farming systems Packaging Details 1 X ESP8266 ESP-12F 4 Channel Wifi IoT Smart Switch Why Choose This ESP8266 ESP-12F 4 Channel Wifi IoT Smart Switch? Perfect for smart home, IoT devices, and automation systems. With wide voltage support, Arduino compatibility, and 4-channel control, it's a reliable and scalable choice for developers and enthusiasts in Bangladesh. Where to Buy ESP8266 ESP-12F 4 Channel Wifi IoT Smart Switch? This Product is available at TechShop, a trusted supplier of Robotics & Electronics in Bangladesh. Visit our office or order online to enjoy swift delivery across the country. We offer the ESP8266 ESP-12F 4 Channel Wifi IoT Smart Switch at the best price in Bangladesh. Our product ensures reliability and quality, backed by customer support from a skilled technical team. Enjoy prompt shipping and warranty protection for a worry-free purchase. Why Should You Buy Products from TechShop? There are many reasons to shop at TechShop. Reliability: We ensure that all our products are of the highest quality and come with a Warranty and Replacement service Easy Policies: If you encounter any issues, our quick and hassle-free replacement policy ensures your work continues without interruptions. Customer Support: Our customer support team is always available to ensure you have the best shopping experience. Buying from TechShop means a safe, hassle-free, and cost-effective experience! Attention Note: This item is non-returnable. If this item arrives damaged or is not functioning properly, please contact us to determine if further actions may be taken. Need Help? Our engineers are available to assist you. If you have any queries, please leave a comment below or call 09678110110 from 09:00 am to 08:00 pm (7 days a week). You can also reach us via Live Chat or Facebook Inbox.
