Sonoff Basic R4 Relay Module

Introducing the Sonoff Basic R4: The Ultimate Smart Switch

Take control of your home appliances like never before with the Sonoff Basic R4, our entry-level smart switch that’s packed with features and functionality. This WiFi + Bluetooth enabled relay switch module is designed to make it easy to turn on/off electrical devices remotely using our eWeLink app for iOS and Android.

Key Features:

• Remote control through eWeLink app (iOS and Android)
• Scheduled on/off switching
• Physical push button switch for local control
• Share remote access with family members or friends
• Compatible with Sonoff’s eWeLink-Remote remote controllers (S-MATE / S-MATE2 modules, R5 wireless switch)

Smart Features:

• Timing functions: set specific times, recurring times, countdown timer/timer, and cycle
• Timed shutdown: automatically shut down devices at a set time after each power on
• Pulse switching: switch devices for a short period of time (e.g. 0.5 or 1 second)
• Grouping and room organization in the eWeLink app

Voice Control Integration:

• Compatible with Amazon Alexa, Google Assistant, and Google Nest for voice control

Perfect for:

• Smart control of household devices that don’t need to be on all the time (e.g. aquarium circulator or aerator)
• Conveniently turn on appliances remotely before you get home
• Save energy and money by timing off devices when not in use

Note: The Sonoff Basic R4 does not have an external thermometer/humidity sensor input, so if you need temperature range or humidity level control, consider our Sonoff TH relay series instead.