Pool temp application

Need Help With My Project
1

My application is a temperature sensor in my pool that each five minutes should report to blynk app. The platform is Arduino nano. As it runs on batteries, it is in deep power down mode most of the time. The nano can control the power to the esp8266 wifi module via a FET.

Both is “up” only a short time to read the temperature sensor and send the temperature, maybe for 20 seconds.

Will this work? I mean, will the blynk server store the temperature until the blynk app asks for it? Or must the app and the platform be online together?

It works when it sends the temperature every 15 seconds, but not when I change to each 5 minutes. Then I get no new values to the app.

Another question: Can other family members install the app to see the temperature? Or is it only single user?

2

Yes.

This is only requirement for widgets in “Frequency mode” that is not in PUSH mode. Any operation Blynk.virtualWrite is stored on server.

Yes. We have sharing feature for that - Introduction - Blynk Documentation

3

Hi @Magnus,
If I were you, I’d rather use the Wemos mini D1 or NodeMCU instead of the Nano and the Esp as Shield. You would save energy from your batteries and reduce the number of items. Btw, the use deep sleep function with the Esp8266 is really easy.
Regards!

1 Like
4

I use history graph and value display. Both assigned to V1. I guess value display is a frequency type, while history graph is not? Will this work?

I use that command you mentioned.

5

If so. it will be stored and no need for active app. For more info please read this - Introduction - Blynk Documentation