How to fix Eventor in Blynk for WeMos D1 mini with photoresist?

Question

Hello. I have made a project in Blynk as attached. I have uploaded a basic program to Wemos under Blynk. I have a photoresistor + resistor connected to A0 and 3.3V connected to GND. I have a relay connected to D1. The Blynk reads the light intensity, there is a graph, I can control the relay via...

khoam · Answer

Please show the extended one. From the picture you posted it is rather impossible to guess this code. . Yes, just like that? What kind of relay is it?

crroo · Answer

Below is the code.
This is a reworked (truncated) code once downloaded from the internet and adapted to my needs, which I have for the greenhouse and there the humidity sensor connected to A0 works.

Log in, to see the code

.

And the relay is such an overlay on the wemos .

.
The relay itself works as I switch this on the buton in the blynk.

I am not very strong in programming

.

khoam · Answer

And where is the transmitBLYNK() function called in this code? This is not a standard supported Blynk function such as BLYNK_READ(). You can take a look at how this is done in the code from the following link: Added after 6 [minutes]: And here:

crroo · Answer

This function is at the end of the code

void transmitBLYNK() { //procedure to send the state of the buttons to the BLYNK server

Blynk.virtualWrite(V0, lux); //sending to Blynk
}

I'll have a look at the links you provided, maybe I'll deduce something

khoam · Answer

. I know that it is at the end of What I don't know is where you call it in your code.

crroo · Answer

Is this how it should be? Code: C / C++Log in, to see the code Unfortunately it does not work .

khoam · Answer

It won't be until you run a timer that calls transmitBLYNK() and reads the analog input every specified time interval.
See the code link from post #4 (the first one) for an implementation of the timer1sek() function and how to configure this timer in setup().

crroo · Answer

I converted the code from the link and it works

Log in, to see the code

.

only i had to disable sleep after 20s

// action.attach(1, 20000, sleep); // put to sleep after 20 sec of operation

I will try to refactor this code for my needs.
Thank you for your help.

crroo · Answer

However, I have a problem with this program, namely this wemos + photoresistor + relay are supposed to give a signal to the alarm, which in the morning (let's say when it reads the intensity of light more than 100) opens the roller blinds and in the evening closes them (when it is less than 50) (such a hysteresis).
It seems to be working OK, but there is a problem: when I turn the project off in Blynk and then on again, the relay switches off at an intensity of, say, 600.
How can I improve this so that the roller shutters do not go up and down unnecessarily?

khoam · Answer

. I would do it like this: store the last N light intensity measurements. After each measurement, I would count the average and the trend from these N measurements and only on this basis would I make a decision on what state the blinds should be in. Added after 2 [minutes]: . It would be good if you showed the current version of the code.

How to fix Eventor in Blynk for WeMos D1 mini with photoresist?

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Didn't find an answer? Ask Artificial Intelligence

Topic summary