In the current Link App version, it is possible to control On/Off devices. The On/Off Devices are Danfoss Link™ PR and Danfoss Link™ HR, 1st generation only. These relays have been phased out and we are currently developing new PR, which we aim to launch in first quarter of 2018. HR will be discontinued.
Until then follow the product launch of the new relays on smartheating.danfoss.com