Download The Ewelink App - Sonoff DIY DUAL R3 User Manual

SONOFF TECHNOLOGIES CO., LTD.
③
Connect dry contact sensors in the following mode:
+
External power
-
supply
+
External power
-
supply
N In
L In
Make sure the neutral wire and live wire connection is correct.
The device still works normally if no a physical light switch is connected to S1/S2.
If S1/S2 is connected to a physical light switch, the corresponding working mode
is required in eWeLink APP to select for normal use.

3. Download the eWeLink APP

Dry contact
sensor
Dry contact
sensor
eWeLink
S2 S1
N In L In L In L
Out
2 L
Out
1
L Out 2
eWeLink
Android™ & iOS
12
English
1
2
L Out 1