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Smart Agriculture

In this setup, you build a soil moisture monitoring system using an ESP32(Node MCU). The sensor reads soil moisture levels and sends the data through the panel topic dash_177xxxxxxxxxx. You can monitor the readings on a dashboard and automate irrigation when the soil becomes too dry.

dash_177xxxxxxxxxx
Create panel

How It Works

  1. Create an account if you are a new user, or sign in if you already have an account.
  2. Create a new panel.
  3. Add widgets to the panel.
  4. Save the panel after adding widgets.
  5. Connect your hardware devices with the respective dashboard topic ID; values will be transmitted and displayed in the widgets.

What you can monitor

Soil moistureCapacitive or resistive sensors.
Temperature & humidityDHT22, BME280, SHT31.
IrrigationRelay-controlled pumps from rules.
LightToggle from dashboard; relay or LED output.
LDR sensorGauge for ambient light level (%).

Before You Start

Make sure your device is connected to the same cloud as KiwisIoT. Your firmware must publish moisture readings to dash_177xxxxxxxxxx in a simple format. Create a dashboard panel and link your widgets to the same topic to visualize the data.

Tips

  • ★ Sign in or create an account so you can create and save your agriculture panel.
  • ★ Create a new panel from My Panels and name it (e.g. Farm moisture).
  • ★ Add widgets: gauges for soil moisture, temperature, humidity, LDR; toggles for irrigation and light.
  • ★ Save the panel after adding widgets so your layout is stored.
  • ★ Connect your soil moisture device using the panel dashboard topic ID so readings show in the widgets.
Smart Agriculture (ESP8266 + KiwisIoT) 
#include <ESP8266WiFi.h>
#include <KiwisIoT.h>
#include <DHT.h>

// WIFI
const char* ssid  = "IOT";      // Replace with your WiFi network name
const char* pass  = "12345678";       // Replace with your WiFi network password
const char* topic = "dash_1773145674891";     // Replace with your dashboard topic ID

KiwisIoT kiwisiot(ssid, pass, topic);

// PINS
#define SOIL_PIN   A0      // Replace with your soil moisture sensor pin number
#define LDR_PIN    D5      // Replace with your LDR sensor pin number
#define RELAY_PIN  D1      // Pump Relay Replace with your pump relay pin number
#define LIGHT_PIN  D6      // Light / LED Replace with your light/LED pin number
#define DHT_PIN    D2      // Replace with your DHT sensor pin number
#define DHTTYPE    DHT11   // Replace with your DHT sensor type

DHT dht(DHT_PIN, DHTTYPE);

// sensor sending timer
unsigned long lastSend = 0;
const long interval = 3000;

// -------- CLOUD CONTROL --------
void onControl(String ch, String val)
{
  Serial.print("Channel: ");
  Serial.print(ch);
  Serial.print(" Value: ");
  Serial.println(val);

  int channel = ch.toInt();

  // -------- Pump Relay (Channel 3) --------
  if(channel == 3)
  {
    if(val == "1")
    {
      digitalWrite(RELAY_PIN, LOW);   // relay ON
      Serial.println("Pump ON");
    }
    else
    {
      digitalWrite(RELAY_PIN, HIGH);  // relay OFF
      Serial.println("Pump OFF");
    }
  }

  // -------- Light Control (Channel 5) --------
  if(channel == 5)
  {
    if(val == "1")
    {
      digitalWrite(LIGHT_PIN, HIGH);  // light ON
      Serial.println("Light ON");
    }
    else
    {
      digitalWrite(LIGHT_PIN, LOW);   // light OFF
      Serial.println("Light OFF");
    }
  }
}

void setup()
{
  Serial.begin(115200);

  pinMode(SOIL_PIN, INPUT);
  pinMode(LDR_PIN, INPUT);

  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LIGHT_PIN, OUTPUT);

  digitalWrite(RELAY_PIN, HIGH); // pump OFF
  digitalWrite(LIGHT_PIN, LOW);  // light OFF

  dht.begin();

  kiwisiot.begin();
  kiwisiot.onReceive(onControl);

  Serial.println("System Started");
}

void loop()
{
  kiwisiot.run();

  unsigned long now = millis();

  if(now - lastSend > interval)
  {
    lastSend = now;

    int soil = analogRead(SOIL_PIN);
    int ldr  = digitalRead(LDR_PIN);

    float temp = dht.readTemperature();
    float hum  = dht.readHumidity();

    kiwisiot.send("0", soil);
    kiwisiot.send("6", ldr);

    if(!isnan(temp) && !isnan(hum))
    {
      kiwisiot.send("1", temp);
      kiwisiot.send("2", hum);
    }
  }
}