https://notenoughtech.com/home-automation/sonoff-dual-r3/

ShutterOpenDuration 20

setoption80 1

shuttermode 1

interlock 1

• calibration

https://tasmota.github.io/docs/Blinds-and-Shutters/#operation

{"NAME":"Sonoff Dual R3 v2","GPIO":[32,0,0,0,0,0,0,0,0,576,225,0,0,0,0,0,0,0,0,0,0,3200,8128,224,0,0,0,0,160,161,0,0,0,0,0,0],"FLAG":0,"BASE":1}

https://templates.blakadder.com/sonoff_DUALR3.html

{"NAME":"Sonoff Dual R3","GPIO":[32,0,0,0,0,0,0,0,0,576,225,0,0,0,0,0,0,0,0,0,0,7296,7328,224,0,0,0,0,160,161,0,0,0,0,0,0],"FLAG":0,"BASE":1}

• shutters

https://tasmota.github.io/docs/Blinds-and-Shutters/#commands  

• Shutter mode 1 - Normal Operation

Relay1: UP/OFF, Relay2: DOWN/OFF

• (Interlocked relay pair)

Interlock 1,2 
Interlock ON