Button Widget + simple timer

[PeteKnight]

@Joepl10

I tested with simple timer and blynk timer but nothing works out

Did you use a BlynkTimer in Timeout mode, preferably as part of a Lambda function?

Read the “Timeout Timers” section of this document, and don’t forget to declare your BlynkTimer object and add timer.run(); to your void loop.

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 …

Once you have this working, if you want to add a slider or time input widget to your app to change the amount of time that the relay stays on for with each button press then you can use the technique described in the "Using variables instead of hard-coded numbers2 section of that document.

You may also need to learn about how to retrieve values from virtual pins, and how to sync the current values when the device starts up. That’s covered here…

Using Virtual Pins to control physical devices

I thought I’d write a guide about how to use virtual pins with app widgets such as buttons, to control physical devices such as relays, LEDs etc… Why use virtual pins anyway? I’d always recommend using virtual pins over physical pins when developing your code. There are a number of reasons, but here are what I consider to be the main ones: Virtual pins are hardware independent. This means that it’s far easier to port your code from one hardware platform to another in future (when you realise…

Pete.