📤 Sending Data to OceanRemote Cloud - ESP8266 HTTP POST

🔌 Wiring (Soil Moisture + DHT22)

Soil Moisture Sensor    ESP8266 (NodeMCU)
═══════════════════     ════════════════
VCC                   → 3.3V
GND                   → GND
AO                    → A0

DHT22                 ESP8266
VCC                   → 3.3V
GND                   → GND
DATA                  → GPIO4 (D2) + 10kΩ pull-up
    

📖 Complete Code (Soil + Temp + Humidity)

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <DHT.h>

// ========== WIFI CREDENTIALS ==========
const char* ssid = "YOUR_WIFI";
const char* password = "YOUR_PASSWORD";

// ========== DEVICE TOKEN ==========
const char* deviceToken = "YOUR_DEVICE_TOKEN";

// ========== SENSOR PINS ==========
#define DHTPIN 4
#define DHTTYPE DHT22
#define SOIL_PIN A0

DHT dht(DHTPIN, DHTTYPE);

// Calibration values (CALIBRATE THESE!)
const int DRY = 950;    // Value in dry air
const int WET = 350;    // Value in water

void setup() {
    Serial.begin(115200);
    dht.begin();
    pinMode(SOIL_PIN, INPUT);
    
    // Connect to WiFi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\n✅ WiFi connected!");
}

void loop() {
    // Read sensors
    float temp = dht.readTemperature();
    float hum = dht.readHumidity();
    
    int raw = analogRead(SOIL_PIN);
    int soil = map(raw, DRY, WET, 0, 100);
    soil = constrain(soil, 0, 100);
    
    if (!isnan(temp) && !isnan(hum)) {
        sendData(temp, hum, soil);
    } else {
        Serial.println("❌ DHT22 read error!");
    }
    
    delay(60000);  // Send every minute
}

void sendData(float temp, float hum, int soil) {
    if (WiFi.status() != WL_CONNECTED) {
        Serial.println("WiFi disconnected!");
        return;
    }
    
    HTTPClient http;
    http.begin("https://api.oceanremote.net/device/state");
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");
    
    String data = "token=" + String(deviceToken);
    data += "&temperature=" + String(temp);
    data += "&humidity=" + String(hum);
    data += "&soil_moisture=" + String(soil);
    
    int httpCode = http.POST(data);
    
    if (httpCode == 200) {
        Serial.println("✅ Data sent to OceanRemote!");
        Serial.printf("   Temp: %.1f°C | Hum: %.0f%% | Soil: %d%%\n", temp, hum, soil);
    } else {
        Serial.printf("❌ Failed: HTTP %d\n", httpCode);
    }
    
    http.end();
}