Mitch K
Published © GPL3+

Moisture Monitor - Orchid & Plant IoT w/ Blynk

A simple 4 channel design/program for monitoring orchid and plant moisture levels.

IntermediateShowcase (no instructions)5 hours2,740
Moisture Monitor - Orchid & Plant IoT w/ Blynk

Things used in this project

Hardware components

Arduino Micro & Genuino Micro
Arduino Micro & Genuino Micro
×1
ESP8266 ESP-01
Everything ESP ESP8266 ESP-01
×1
DHT22 Temperature Sensor
DHT22 Temperature Sensor
DHT11 will work just fine also
×1
Soil Moisture Sensor
×4
Linear Regulator (7805)
Linear Regulator (7805)
×1
Capacitor 100 µF
Capacitor 100 µF
×1
Resistor 100k ohm
Resistor 100k ohm
×2
Double-Side Prototype PCB - 4cm x 6cm
×1

Software apps and online services

Arduino IDE
Arduino IDE
Blynk
Blynk
Fusion 360
Autodesk Fusion 360

Hand tools and fabrication machines

3D Printer (generic)
3D Printer (generic)

Story

Read more

Custom parts and enclosures

Case - Bottom

This is the bottom part for the enclosure

Case - Top

Schematics

Layout

Moisty schem vdqw44yvu1

Code

blynk_AT_4x_soil.ino

Arduino
// AT+UART_DEF=9600,8,1,0,0

//#define BLYNK_PRINT Serial
#include <ESP8266_Lib.h>
#include <BlynkSimpleShieldEsp8266.h>
#include <SimpleTimer.h>
#include <DHT.h>
#include <Adafruit_Sensor.h>


#define DHTPIN 9
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);


char auth[] = "you code here";
char ssid[] = "your wifi SSID here";
char pass[] = "Wifi password here";

SimpleTimer timer;

#define EspSerial Serial1

#define ESP8266_BAUD 9600

ESP8266 wifi(&EspSerial);

const int soilPin1 = A0;
const int soilPowerPin1 = 5;
int soilVal1;

const int soilPin2 = A1;
const int soilPowerPin2 = 4;
int soilVal2;

const int soilPin3 = A2;
const int soilPowerPin3 = 3;
int soilVal3;

const int soilPin4 = A3;
const int soilPowerPin4 = 2;
int soilVal4;



const int boardLed = 17;

const int numReadings = 6;

int readings[numReadings];      // the readings from the analog input
int readIndex = 0;              // the index of the current reading
int total = 0;                  // the running total
int average = 70;                // the average


int notifyMe = 0;

void setup()
{

	EspSerial.begin(ESP8266_BAUD);
	delay(10);

	Blynk.begin(auth, wifi, ssid, pass);
	timer.setInterval(10000, check);
	dht.begin();
	pinMode(soilPin1, INPUT);
	pinMode(soilPin2, INPUT);
	pinMode(soilPin3, INPUT);
	pinMode(soilPin4, INPUT);
	pinMode(soilPowerPin1, OUTPUT);
	pinMode(soilPowerPin2, OUTPUT);
	pinMode(soilPowerPin3, OUTPUT);
	pinMode(soilPowerPin4, OUTPUT);

	pinMode(boardLed, OUTPUT);

//  digitalWrite(boardLed, HIGH);
}





void check()
{

	total = total - readings[readIndex];

	readings[readIndex] = (dht.readTemperature(true));

	total = total + readings[readIndex];

	readIndex = readIndex + 1;


	if (readIndex >= numReadings)
		{
			readIndex = 0;
		}

	average = total / numReadings;

	Blynk.virtualWrite(V10,average);

	Blynk.virtualWrite(V12,(dht.readHumidity()));
	delay(500);

	digitalWrite(soilPowerPin1, HIGH);
	delay(500);
	soilVal1 = (1024 - analogRead(soilPin1));
	Blynk.virtualWrite(V0, soilVal1);
	digitalWrite(soilPowerPin1, LOW);

	digitalWrite(soilPowerPin2, HIGH);
	delay(500);
	soilVal2 = (1024 - analogRead(soilPin2));
	Blynk.virtualWrite(V1, soilVal2);
	digitalWrite(soilPowerPin2, LOW);

	digitalWrite(soilPowerPin3, HIGH);
	delay(500);
	soilVal3 = (1024 - analogRead(soilPin3));
	Blynk.virtualWrite(V2, soilVal3);
	digitalWrite(soilPowerPin3, LOW);

	digitalWrite(soilPowerPin4, HIGH);
	delay(500);
	soilVal4 = (1024 - analogRead(soilPin4));
	Blynk.virtualWrite(V3, soilVal4);
	digitalWrite(soilPowerPin4, LOW);



//  uncomment if you want push notifications

//    if (soilVal < 150)
//      {
//        if (notifyMe = 0)
//          {
//             Blynk.notify("Dry Plants");
//             notifyMe = 1;
//          }
//      }
//    else
//      {
//        notifyMe = 0;
//      }

}




void loop()
{
	Blynk.run();
	timer.run();
}

Credits

Mitch K

Mitch K

1 project • 10 followers

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