Error : Why my TDS Sensor get 0 ppm when I put the blynk code?

[PeteKnight]

No, the contents of your old void loop, minus the blocking delay(), will be in a function which is called with a timer.

I’d recommend calling that timer every 5 seconds or more, as the DHT sensors don’t respond well to higher frequency readings.

Also, it’s better to use BlynkTimer rather than SimpleTimer.

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 …

Pete.