summer berry

============================================================

WR SUMMER BERRY - ESP32 SMART FARM (v2 - IMPROVED)

Strawberry Environmental Control System

============================================================

WHAT CHANGED FROM v1

------------------------------------------------------------

- JSON now built with ArduinoJson (safer than string concat)

- Thresholds (soil/temp/humidity/light) are now adjustable

from the web page via /thresholds (GET + POST) and are

saved to flash (Preferences/NVS), so they survive reboots

- Auto mode state is also persisted

- mDNS added -> reachable at http://wrsummerberry.local

- Non-blocking critical alarm buzzer (old beep() used delay()

which freezes the whole loop - only safe at startup)

- Web dashboard rewritten: live connection indicator,

"last updated Xs ago", per-sensor threshold hints,

toggle-switch style controls, settings panel, toast

notifications, and defensive fetch() error handling

REQUIRED LIBRARIES (Library Manager)

------------------------------------------------------------

- DHT sensor library (Adafruit)

- BH1750 (claws)

- Adafruit GFX Library

- Adafruit SSD1306

- ArduinoJson (Benoit Blanchon) <-- NEW

Built-in (ESP32 core): WiFi, WebServer, HTTPClient,

WiFiClientSecure, Wire, Preferences, ESPmDNS

Sensors

------------------------------------------------------------

Soil Moisture -> GPIO 32

DHT22 -> GPIO 35

BH1750 SDA -> GPIO 23

BH1750 SCL -> GPIO 22

OLED I2C

------------------------------------------------------------

OLED SDA -> GPIO 21

OLED SCL -> GPIO 19

Relays

------------------------------------------------------------

Water Pump -> GPIO 33

Grow Light -> GPIO 25

Cooling -> GPIO 26

Fan -> GPIO 27

Mist Maker -> GPIO 14

Buzzer

------------------------------------------------------------

IMPORTANT:

GPIO34 is INPUT ONLY on ESP32.

Therefore buzzer cannot be connected to GPIO34.

This program uses GPIO13 for buzzer.

============================================================

#include <WiFi.h>

#include <WebServer.h>

#include <HTTPClient.h>

#include <WiFiClientSecure.h>

#include <Wire.h>

#include <DHT.h>

#include <BH1750.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#include <ArduinoJson.h>

#include <Preferences.h>

#include <ESPmDNS.h>

// ============================================================

// WIFI

// ============================================================

const char* AP_SSID = "WR SUMMER BERRY2";

const char* AP_PASSWORD = "12345678";

const char* MDNS_NAME = "wrsummerberry"; // -> http://wrsummerberry.local

// ============================================================

// PIN CONFIGURATION

// ============================================================

#define SOIL_PIN 32

#define DHT_PIN 35

// Buzzer

// GPIO34 cannot OUTPUT -> use GPIO13 instead

#define BUZZER_PIN 13

// Relays

#define PUMP_RELAY 33

#define LIGHT_RELAY 25

#define COOL_RELAY 26

#define FAN_RELAY 27

#define MIST_RELAY 14

// BH1750

#define LIGHT_SDA 23

#define LIGHT_SCL 22

// OLED

#define OLED_SDA 21

#define OLED_SCL 19

// ============================================================

// SENSOR CONFIG

// ============================================================

#define DHTTYPE DHT22

DHT dht(DHT_PIN, DHTTYPE);

BH1750 lightMeter;

#define SCREEN_WIDTH 128

#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(

SCREEN_WIDTH,

SCREEN_HEIGHT,

&Wire,

-1

);

// ============================================================

// WEB SERVER / STORAGE

// ============================================================

WebServer server(80);

Preferences prefs;

// ============================================================

// DISCORD WEBHOOK

// ============================================================

// ใส่ Discord Webhook ของคุณตรงนี้

// ตัวอย่าง:

// https://discord.com/api/webhooks/XXXXXXXX/XXXXXXXX

const char* DISCORD_WEBHOOK = "https://discord.com/api/webhooks/1544386889778208788/eAlhDHGcbjvX-a3zBuPqFrd1NrG-7t0Xbqx9l3DW4GgluGaxyjtS2f2D_4bruRzE-GpR";

// ============================================================

// SENSOR VALUES

// ============================================================

float temperature = 0;

float humidity = 0;

float lightLux = 0;

int soilRaw = 0;

int soilPercent = 0;

bool dhtOk = false; // last DHT read validity, shown on dashboard

// ============================================================

// AUTO MODE

// ============================================================

bool autoMode = true;

bool pumpState = false;

bool lightState = false;

bool coolState = false;

bool fanState = false;

bool mistState = false;

// ============================================================

// THRESHOLDS (now adjustable + persisted)

// ============================================================

int SOIL_DRY = 30; // %

float TEMP_HIGH = 30.0; // C

float HUMIDITY_LOW = 60.0; // %

float LIGHT_LOW = 500.0;// lux

// ============================================================

// CRITICAL ALARM (non-blocking)

// ============================================================

const int SOIL_CRITICAL = 10; // % - below this we sound an alarm

bool alarmActive = false;

bool buzzerToggle = false;

unsigned long lastBuzzerToggle = 0;

const unsigned long BUZZER_INTERVAL = 400; // ms on/off period

// ============================================================

// TIMERS

// ============================================================

unsigned long lastSensorRead = 0;

unsigned long lastDiscord = 0;

unsigned long lastDisplay = 0;

const unsigned long SENSOR_INTERVAL = 2000;

const unsigned long DISCORD_INTERVAL = 60000;

const unsigned long DISPLAY_INTERVAL = 1000;

// ============================================================

// RELAY LOGIC

// ============================================================

// Most relay modules are ACTIVE LOW.

// If your relay works opposite, change this.

#define RELAY_ON LOW

#define RELAY_OFF HIGH

// ============================================================

// SET RELAY

// ============================================================

void setRelay(int pin, bool state)

{

digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);

}

// ============================================================

// BUZZER (startup beep - fine to block here, only runs once)

// ============================================================

void beep(int duration = 200)

{

digitalWrite(BUZZER_PIN, HIGH);

delay(duration);

digitalWrite(BUZZER_PIN, LOW);

}

// Non-blocking alarm updater - call every loop(), never delay()s

void updateAlarm()

{

bool shouldAlarm = (soilPercent > 0) && (soilPercent < SOIL_CRITICAL);

// soilPercent > 0 guards against an unconnected/uncalibrated sensor

// reading a false "0%" and beeping forever on boot.

alarmActive = shouldAlarm;

if (!alarmActive)

{

digitalWrite(BUZZER_PIN, LOW);

buzzerToggle = false;

return;

}

unsigned long now = millis();

if (now - lastBuzzerToggle >= BUZZER_INTERVAL)

{

lastBuzzerToggle = now;

buzzerToggle = !buzzerToggle;

digitalWrite(BUZZER_PIN, buzzerToggle ? HIGH : LOW);

}

// ============================================================

// PREFERENCES (persist thresholds + auto mode across reboot)

// ============================================================

void loadSettings()

{

prefs.begin("wrsb", true); // read-only

SOIL_DRY = prefs.getInt("soilDry", SOIL_DRY);

TEMP_HIGH = prefs.getFloat("tempHigh", TEMP_HIGH);

HUMIDITY_LOW = prefs.getFloat("humLow", HUMIDITY_LOW);

LIGHT_LOW = prefs.getFloat("lightLow", LIGHT_LOW);

autoMode = prefs.getBool("autoMode", autoMode);

prefs.end();

}

void saveThresholds()

{

prefs.begin("wrsb", false);

prefs.putInt("soilDry", SOIL_DRY);

prefs.putFloat("tempHigh", TEMP_HIGH);

prefs.putFloat("humLow", HUMIDITY_LOW);

prefs.putFloat("lightLow", LIGHT_LOW);

prefs.end();

}

void saveAutoMode()

{

prefs.begin("wrsb", false);

prefs.putBool("autoMode", autoMode);

prefs.end();

}

// ============================================================

// READ SENSORS

// ============================================================

void readSensors()

{

// Soil

soilRaw = analogRead(SOIL_PIN);

ESP32 ADC calibration:

The raw values below (4095 dry / 1200 wet) are typical

defaults for a capacitive soil sensor but WILL vary by

sensor and supply voltage. To calibrate:

1. Read soilRaw in open air (fully dry) -> use as "dry" bound

2. Read soilRaw fully submerged in water/wet soil -> use as "wet" bound

3. Replace the 4095 / 1200 constants below with those values

soilPercent = map(

soilRaw,

4095,

1200,

100

);

soilPercent = constrain(

soilPercent,

100

);

// DHT22

float newHumidity = dht.readHumidity();

float newTemperature = dht.readTemperature();

dhtOk = !isnan(newHumidity) && !isnan(newTemperature);

if (!isnan(newHumidity))

humidity = newHumidity;

if (!isnan(newTemperature))

temperature = newTemperature;

// BH1750

float newLight = lightMeter.readLightLevel();

if (newLight >= 0)

lightLux = newLight;

Serial.println("================================");

Serial.println("WR SUMMER BERRY SENSOR");

Serial.println("================================");

Serial.print("Soil Raw: "); Serial.println(soilRaw);

Serial.print("Soil: "); Serial.print(soilPercent); Serial.println("%");

Serial.print("Temperature: "); Serial.print(temperature); Serial.println(" C");

Serial.print("Humidity: "); Serial.print(humidity); Serial.println(" %");

Serial.print("Light: "); Serial.print(lightLux); Serial.println(" lux");

Serial.println();

}

// ============================================================

// AUTOMATIC CONTROL

// ============================================================

void automaticControl()

{

if (!autoMode)

return;

pumpState = (soilPercent < SOIL_DRY);

lightState = (lightLux < LIGHT_LOW);

bool overTemp = (temperature > TEMP_HIGH);

coolState = overTemp;

fanState = overTemp;

mistState = (humidity < HUMIDITY_LOW);

setRelay(PUMP_RELAY, pumpState);

setRelay(LIGHT_RELAY, lightState);

setRelay(COOL_RELAY, coolState);

setRelay(FAN_RELAY, fanState);

setRelay(MIST_RELAY, mistState);

}

// ============================================================

// DISCORD

// ============================================================

void sendDiscord(String message)

{

if (

strlen(DISCORD_WEBHOOK) < 20 ||

String(DISCORD_WEBHOOK) == "YOUR_DISCORD_WEBHOOK_HERE"

)

{

Serial.println("Discord webhook not configured.");

return;

}

WiFiClientSecure client;

client.setInsecure();

HTTPClient https;

if (!https.begin(client, DISCORD_WEBHOOK))

{

Serial.println("Discord connection failed.");

return;

}

https.addHeader("Content-Type", "application/json");

StaticJsonDocument<512> doc;

doc["content"] = message;

String json;

serializeJson(doc, json);

int httpCode = https.POST(json);

Serial.print("Discord HTTP: ");

Serial.println(httpCode);

https.end();

}

// ============================================================

// DISCORD STATUS

// ============================================================

void sendStatusToDiscord()

{

String message;

message += "\xF0\x9F\x8D\x93 **WR SUMMER BERRY STATUS**\n\n";

message += "Soil: " + String(soilPercent) + "%\n";

message += "Temperature: " + String(temperature, 1) + " C\n";

message += "Humidity: " + String(humidity, 1) + " %\n";

message += "Light: " + String(lightLux, 0) + " lux\n\n";

message += "AUTO MODE: ";

message += autoMode ? "ON" : "OFF";

if (alarmActive)

{

message += "\n\n WARNING: Soil critically dry (<" + String(SOIL_CRITICAL) + "%)!";

}

sendDiscord(message);

}

// ============================================================

// OLED DISPLAY

// ============================================================

void updateDisplay()

{

display.clearDisplay();

display.setTextColor(SSD1306_WHITE);

display.setTextSize(1);

display.setCursor(0, 0);

display.println("WR SUMMER BERRY");

display.setCursor(0, 12);

display.print("TEMP: "); display.print(temperature, 1); display.println(" C");

display.setCursor(0, 22);

display.print("HUM : "); display.print(humidity, 0); display.println(" %");

display.setCursor(0, 32);

display.print("SOIL: "); display.print(soilPercent); display.println(" %");

display.setCursor(0, 42);

display.print("LUX : "); display.print(lightLux, 0);

display.setCursor(0, 54);

display.print("AUTO: "); display.print(autoMode ? "ON" : "OFF");

if (alarmActive)

{

display.setCursor(70, 42);

display.print("!DRY");

}

display.display();

}

// ============================================================

// WEB PAGE

// ============================================================

String createWebPage()

{

String html = R"rawliteral(

<!DOCTYPE html>

<html>

<head>

<title>WR SUMMER BERRY</title>

<style>

*{box-sizing:border-box;}

:root{

--pink:#ff7eb3;

--blue:#65c7f7;

--green:#18b875;

--red:#e0537a;

--text:#263238;

--muted:#8a94a6;

}

body{

margin:0;

font-family:'Segoe UI',Arial,Helvetica,sans-serif;

background:linear-gradient(135deg,#ffe5f2,#e3f5ff);

color:var(--text);

padding-bottom:30px;

}

.header{

padding:22px 25px;

background:linear-gradient(135deg,var(--pink),var(--blue));

color:white;

border-radius:0 0 28px 28px;

box-shadow:0 10px 30px rgba(0,0,0,.12);

position:sticky; top:0; z-index:10;

}

.header-row{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:10px;}

.logo{font-size:24px;font-weight:bold;}

.subtitle{opacity:.9;margin-top:4px;font-size:13px;}

.conn{

display:flex;align-items:center;gap:8px;

background:rgba(255,255,255,.18);

padding:8px 14px;border-radius:20px;font-size:13px;font-weight:bold;

}

.dot{width:9px;height:9px;border-radius:50%;background:#9be8c4;transition:.2s;}

.dot.offline{background:#ffb3b3;}

.updated{font-size:11px;opacity:.85;font-weight:normal;margin-top:2px;}

.container{max-width:1100px;margin:auto;padding:20px;}

.mode-banner{

background:white;padding:14px 20px;border-radius:18px;margin-bottom:18px;

display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;

box-shadow:0 8px 25px rgba(0,0,0,.08);

}

.mode-banner span.label{font-size:13px;color:var(--muted);}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;}

.card{

background:rgba(255,255,255,.92);padding:20px;border-radius:22px;

box-shadow:0 10px 30px rgba(74,144,226,.10);transition:.2s;

}

.card:hover{transform:translateY(-3px);}

.icon{font-size:30px;}

.title{color:var(--muted);margin-top:6px;font-size:14px;}

.value{font-size:30px;font-weight:bold;margin-top:4px;}

.unit{font-size:14px;color:var(--muted);}

.hint{margin-top:8px;font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px;}

.hint .tag{

padding:2px 8px;border-radius:10px;font-size:11px;font-weight:bold;

}

.tag.ok{background:#d9fbe9;color:var(--green);}

.tag.warn{background:#ffe0e8;color:var(--red);}

.section{margin-top:26px;}

.section h2{margin-bottom:12px;font-size:18px;}

.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;}

.control{

background:white;padding:18px;border-radius:20px;text-align:center;

box-shadow:0 8px 20px rgba(0,0,0,.08);

opacity:1;transition:.2s;

}

.control.disabled{opacity:.55;}

.control .name{font-weight:bold;margin-bottom:8px;}

.switch{position:relative;display:inline-block;width:52px;height:28px;}

.switch input{opacity:0;width:0;height:0;}

.slider{

position:absolute;cursor:pointer;inset:0;background:#e2e8f0;

border-radius:28px;transition:.2s;

}

.slider:before{

position:absolute;content:"";height:22px;width:22px;left:3px;bottom:3px;

background:white;border-radius:50%;transition:.2s;box-shadow:0 2px 4px rgba(0,0,0,.2);

}

input:checked + .slider{background:var(--pink);}

input:checked + .slider:before{transform:translateX(24px);}

input:disabled + .slider{cursor:not-allowed;}

.badge{display:inline-block;padding:6px 12px;border-radius:20px;font-size:12px;font-weight:bold;margin-top:8px;}

.active{background:#d9fbe9;color:var(--green);}

.inactive{background:#ffe0e8;color:var(--red);}

.auto-toggle-row{display:flex;align-items:center;gap:12px;}

.settings{background:white;border-radius:20px;padding:18px 20px;box-shadow:0 8px 20px rgba(0,0,0,.08);}

.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin:14px 0;}

.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px;}

.field input{

width:100%;padding:9px 10px;border-radius:10px;border:1px solid #e2e8f0;font-size:14px;

}

.save-btn{

background:var(--blue);color:white;border:0;padding:11px 24px;border-radius:24px;

font-weight:bold;cursor:pointer;

}

.save-btn:active{transform:scale(.97);}

.alarm-banner{

background:#fff0f0;border:1px solid #ffb3b3;color:#c0304f;

padding:12px 18px;border-radius:16px;margin-bottom:16px;font-weight:bold;

display:none;align-items:center;gap:8px;

}

.alarm-banner.show{display:flex;}

.footer{text-align:center;margin:30px 10px 10px;color:var(--muted);font-size:12px;}

.toast-wrap{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);z-index:50;display:flex;flex-direction:column;gap:8px;align-items:center;}

.toast{

background:#263238;color:white;padding:10px 18px;border-radius:20px;font-size:13px;

box-shadow:0 8px 20px rgba(0,0,0,.25);opacity:0;transform:translateY(10px);

transition:.25s;

}

.toast.show{opacity:1;transform:translateY(0);}

.toast.err{background:#c0304f;}

</style>

</head>

<body>

<div>

<div class="logo">🍓 WR SUMMER BERRY</div>

<div class="subtitle">Smart Strawberry Environmental Control System</div>

</div>

<div>

<span id="connText">Connecting...</span>

</div>

</div>

⚠ Soil moisture critically low - please check the plants

</div>

<div>

<div><b>ESP32 SMART FARM</b></div>

<span class="label">Manual control automatically switches the system to MANUAL mode.</span>

</div>

</div>

<div class="title">Soil Moisture</div>

<div class="hint">Waters below <span id="soilTh">--</span>% <span class="tag" id="soilTag">--</span></div>

</div>

<div class="title">Temperature</div>

<div class="hint">Cools above <span id="tempTh">--</span>°C <span class="tag" id="tempTag">--</span></div>

</div>

<div class="title">Humidity</div>

<div class="hint">Mists below <span id="humTh">--</span>% <span class="tag" id="humTag">--</span></div>

</div>

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