Sonoff Basic R3, R4 type devices
Used for Windows based Home Automation
(remote access via eWeLink)
What you can do with this device?:
Use it to turn a device on or off
Test to see if the device is on or off
Used in a circuit, test if the circuit is live or not
Instructions for use
Sample usage in a BAT file
SonoffPost operating program
Sonoff Basic R3 Product overview