WiFi module Sonoff PSF-B with relay for remote door opening / eWelink /

The WiFi module Sonoff cooperating with the eWelink application can be used as a wireless switch of appliances in the OFF-ON mode (permanently on or off) or OFF- (ON) (momentary switching on 0.7 sec). It is primarily intended for controlling garage or sliding gates. It does not have a condition check, ie. it is not possible to determine remotely whether the door is currently open or closed (In the case where a single pulse is used for opening and closing).


Technical parameters:

- 5VDC (micro USB)
- consumption: <1W
- max. relay current load: 10A (NC + NO contacts)
- Wifi standard: 2.4GHz b / g / n
- standby current: 80mA
- buttons for manual control and for setting the switching and network login modes
- dimensions: 75 × 27 × 23mm

- description eg here:
https://www.youtube.com/watch?v=B5IVg1uV8eI

Note:
It is not recommended to use a 230V relay, as this type of relay with a central contact between the coil supply terminals does not meet the mandatory 4kV surge protection.
The need to register the control software and specific deskurely via a shared password to the home WiFi on the manufacturer's server.

The product is not a stand-alone unit, it requires professional installation.