Alright, i can post again. The site wouldnt let me post anymore because i reached the max ammount of replies. I never deleted the code i just didnt include it in the picture, its all still there. I tried running the code on my board, it displays the temp/moisture just fine, the slider controlls the LED but it doesnt turn it on or off when it reaches a specific number, its acts like a potentiometer. Other than that the code works perfectly.
Except, where it is now it doesn’t serve the purpose that it’s defined for.
What you are doing is…
- take a reading from your DHT11
- compare this reading to your set point and turn GPIO14 on or off
- check where the reading from the DHT11 was valid or not
Can’t you see that this data validity check belongs immediately after the bit where you take a reading??
What do you have attached to GPIO14 ?
Pete.
Also GPIO14?? I honestly had no idea wat that was, i had to look it up. I dont think i used that…
I connected my sensor to D2 it says that one is GPIO4, ground and the 5v pin.
Oh i think i see what you mean, it says that GPIO14 is the D6 pin, yea thats my LED
, im using the built in arduino LED.
I think you’ll find that on the MKR1000, the pin labelled D6 is GPIO6
Pete.
Oh i just looked up GPIO14 not knowing what it is, my bad on the picture i saw it was pin 6 on some random board and assumed its the same for all of them.
Alright, sorry for the lack of activity, i had some issues to take care of. So, um how do i fix my virtual slider acting like a potentiometer?`
#define BLYNK_PRINT SerialUSB
#include <SPI.h>
#include <WiFi101.h>
#include <BlynkSimpleWiFiShield101.h>
#include <DHT.h>
char auth[] = "";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "";
char pass[] = "";
float humidty_setpoint,h,t;
#define DHTPIN 2
#define DHTTYPE DHT11
DHT dht(2,11);
BlynkTimer timer;
void sendSensor()
{
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;}
if (h > humidty_setpoint)
{digitalWrite(6,HIGH);}
else
{digitalWrite(6,LOW);}
Blynk.virtualWrite(V5, t);
Blynk.virtualWrite(V6, h);
}
void setup()
{
pinMode(14, OUTPUT);
// Debug console
SerialUSB.begin(9600);
Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);
dht.begin();
timer.setInterval(1000L, sendSensor);
}
BLYNK_WRITE(V1){
int humidty_setpoint = param.asInt();
}
void loop()
{
Blynk.run();
timer.run();
}
code looks like this
???
You also need to re-read post #4 where I said…
and compare this to your existing BLYNK_WRITE(V1) function.
Pete.
Yeah i changed it back to humidity, i dont know whats wrong with the pin mode. I originally changed the humidity_setpoint to temp because my LED is supposed to light up when the temp gets under the desired temperature. So i thought that it wasnt working because it said humidity,
The pin issues…
To use a pin, you declare it as an input or output pin with a pinMode function, then if it’s an output pin you write to it with a digitalWrite command.
You are doing digitalWrites to pin 6, but you have no corroborating pinMode command for pin 6.
Instead, you have a pinMode command for pin 13, which you are not using.
The variable scope issue…
You are declaring a global float variable called humidity_setpoint at the top of your sketch.
You are then re-declaring a local version of humidity_setpoint as an integer within your BLYNK_WRITE(V1) function, by placing int in front of the variable name.
That int declaration isn’t in the code snippet I posted in post #4, but you’ve added it in to your code. Please, go back and re-read post #4 as understanding variable scope is one of the most important issues in C++ coding.
Pete.