Using If This Then That Logic via GUI? Temp to Control AC via Relay

Need Help With My Project
1

Hi All,

Looking to improve an existing project.
Using BME280 Temp/humidity sensor in my work room via ESP8266

Everything works great.
I want to make the sensor smarter and learn how to hookup a relay to manage temp in a room via Fan or AC

So currently V0 shows Temp.

I want to use logic like

if V0 > 90 Degrees Turn Relay On ( turns on fan/ac)
if V0 < 75 Degrees Turn Off Relay ( Turns off fan/ac)

Is that possible using widgets?

Thanks!

2

Look at Eventor.

3

You don’t really need an extra widget to do this. You have the temperature, you just have to write code to turn the relay off/on.

But if you want to take the project a bit further, you can change the set temperature and hysteresis with widgets. You can then use Blynk to set the temperature in the room.

4

@Costas thank you.

This sounds perfect but for some reason i cant find that widget in the widget box.
Latest version of Blynk app on ios.

I added an RTC widget like the instructions said.

Do i have to do anything special to be able to insert Eventor?

5

@Eugene any ETA for Eventor.

@Morty sell the iOS and buy a couple of Android devices.

1 Like
6

You can also install BlueStacks. It’s an Android emulator for the PC. That way you can enjoy the Blynk App in it’s most natural habitat, a.k.a. Android :slight_smile:

1 Like
7

Eventor widget just passes a rule to be executed on server. This has its up and down sides. For example, in your case, the relay won’t turn on/off when needed if for some reason the network connection on your device is lost.

That is why, some might want to add those 3 lines of code checking temperature and turning relay on/off on the device itself.

Sorry, we can’t provide an accurate ETA due to always-changing pipeline of tasks for business customers.

8

It will for the OP because temperature is checked on a regular basis and a well designed system shouldn’t suffer with network disconnects.

9

Hi all.
I have an android for testing purposes and its doing what i want so… yay!

Once last question about eventor.

What would be the best way to wrap timing constraints to eventor events.
So for example… if i only want eventor logic from 9am to 5pm and disable eventor from 6 pm to 8am, what would be the best way to accomplish this?

10

Set a time constraint on it in the eventor itself I presume. Have it disable/enable the Timers I’d reckon.