My friends and me have a little sonoff community and often use the mini R4 as a sensor (in following mode with an end-state-switch connected to the R4 input) to detect if the garage door is open. It is a replacement for the the poor wifi capatibilities of the DW2 sensor with 802.11b wich slows down the network for all other devices when 802.11b is allowed at the access point. It works great but in ewelink app/ihost the R4 is displayed as a switch (even in following mode) so it is not reliable to use as a sensor because you can manually change the state. DW2 ist displayed as a sensor with the time of the last trigger event in the icon. Is it possible that the mini R4 will get a configuration option to display as a sensor when it is in following mode? So it would be a great device to get simple states of many devices that have an output.