Blynk sprinkler system

[PeteKnight]

@daniel_calin89

Blynk version: 2.27.32
Blynk library version: v1.0.1

You’re using Blynk legacy. It’s always a good idea to use library version 0.6.1 with Legacy, but it’s an even better idea to switch to Blynk IoT, as legacy will be retired and decommissioned at some point.

Your project uses digital pins, which is another bad idea, you would be far better using virtual pins.

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…

You could use a BlynkTimer to periodically check if your device is connected to WiFi or Blynk, and turn off all of your relays if it isn’t.

It’s probably a good idea to switch to up a managing your own WiFi connection and using Blynk.config and Blynk.connect instead of Blynk.begin

Pete.