Inching mode can switch relay ON for few seconds and then automatically switch in OFF (break circuit).
It would be very useful to make "reverse inching" - break circuit for few seconds from ON position. Default state should be ON - after button press (app, remote, RF button) switch to OFF for few seconds then switch ON again automatically.
Can be used for rebooting devices.
I tested on RF Basic 2.6.0 - when I enable inching mode in app it turns OFF as default position. To implement just need to let it stay in current state :
- if now OFF - enabling inching in setting should enable standard inching
- in now ON - enabling inching in setting should enable "reverse inching"
To do that the relay would have to be continuously energized by default and deenergized to produce the break. Not very energy efficient and a mains power interruption would cause it to change state. What is really needed on these things is a spdt relay so you could access both NO and NC contacts.
SPDT relay is a separate device. Sonoff device already has a relay, wireless interface, remote, logic and a sensor button and in-wall mounting form-factor (for T1 switch), just need a small new firmware feature.
Please understand... The feature you are asking for would keep the internal relay continuously energized. If the power failed the circuit would open. Swap the relay for a SPDT relay and use the NO contacts.