Smart Wi-Fi Relay Main Board – ESP8266 Remote Power Control | Jaycar XC3804

You don't need to drive across town to kill the power on that heater or check whether the shed light's still on. This board does it for you from your phone, anywhere with a signal. It's a 45 × 28mm ESP8266 relay board with screw terminal blocks so wiring isn't a fiddle. The 5V relay handles loads that'd fry an ordinary dev board. Feed it 5V via the 4-pin header, or tap TX and RX for serial debugging. Program it with the XC4464 – no proprietary lock-in. Set your modem IP once, and you're done. Add to cart and start building tonight

• ESP8266 Wi-Fi module – trigger from an app anywhere in the world
• 45 × 28mm board with screw terminal blocks for easy wiring
• 5V relay handles higher-current loads than a standard dev board
• 4-pin header for 5V power input or TX/RX serial debug access
• Programmable via XC4464 – no proprietary software required