Home semi-auto function

[PeteKnight]

@Shafiq_Anuar

ON/OFF widget button do not display correctly based on the situation for example the button show OFF by default, when PIR sensor trigger and relay turn ON, the widget button still at the OFF position.

That’s because your code that turns the relay on/off (case 1: and case 2:) don’t include any blynk.virtualWrite(vpin,value) commands to update the switch widget to reflect the state of the relay.

@Shafiq_Anuar

When I manually turn ON the relay by using widget button, the relay turn ON very well but, if the PIR Sensor trigger something in that time, the relay will turn OFF - turn ON repeatedly until I turn OFF widget button.

For the relay to ignore the off command (the case 2: option in relayOnOff() you need to add an additional “flag” variable which is checked before turning the relay off in case 2:
You could use a boolean variable type for this, and set it to true whe you turn the light on with the button widget and false when turned off with the button widget.

Also, you should remove the

@Shafiq_Anuar

relayOnOff();

call from your void loop and instead call it with a BlynkTimer.

This topic covers BlynkTimers:

Using BlynkTimer or SimpleTimer

Many users seem to struggle with the basic concepts of using BlynkTimer in their projects, despite the excellent discussions and tutorials that exist on this forum, so I thought I’d write a guide that will hopefully help clarify things. It’s rather long, as it attempts to explain the reasoning behind why and how we use timers, and covers some more advanced subjects, but I’ve tried to organise it in a way that helps people to find answers to specific questions… Why use a timer at all? Let’s say …

and the section called " Overriding a Timer (auto/manual mode)" explains a little more about how to use a flag variable to override the PIR sensor.

Pete.