☀️ Complete Solar-Powered Weather Station

Combine soil moisture + DHT22 + WiFi + power saving for a complete farm monitoring system!

📖 Complete Project Code:

import network
import urequests
import machine
import time
import dht
from machine import Pin, ADC

# WiFi credentials
ssid = "YOUR_WIFI"
password = "YOUR_PASSWORD"
token = "YOUR_OCEANREMOTE_TOKEN"

# Sensors
moisture = ADC(Pin(26))
dht_sensor = dht.DHT22(Pin(0))

def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect(ssid, password)
    while not wlan.isconnected():
        print("Connecting...")
        time.sleep(1)
    print("✅ WiFi connected")

def read_all_sensors():
    # Soil moisture
    raw = moisture.read_u16()
    moisture_percent = 100 - ((raw - 20000) * 100 / (60000 - 20000))
    moisture_percent = max(0, min(100, moisture_percent))
    
    # DHT22
    try:
        dht_sensor.measure()
        temp = dht_sensor.temperature()
        hum = dht_sensor.humidity()
    except:
        temp = 0
        hum = 0
    
    return temp, hum, moisture_percent

def send_data(temp, hum, soil):
    url = "https://api.oceanremote.net/device/state"
    data = f"token={token}&temperature={temp}&humidity={hum}&soil_moisture={soil}"
    
    try:
        response = urequests.post(url, data=data)
        response.close()
        print("✅ Data sent to OceanRemote")
    except Exception as e:
        print(f"Failed: {e}")

while True:
    # Read sensors
    temp, hum, soil = read_all_sensors()
    print(f"🌡️ Temp: {temp}°C | 💧 Humidity: {hum}% | 🌱 Soil: {soil:.0f}%")
    
    # Connect and send
    connect_wifi()
    send_data(temp, hum, soil)
    
    # Deep sleep for 15 minutes
    print("💤 Sleeping for 15 minutes...")
    machine.lightsleep(15 * 60 * 1000)
    

🔋 Components Needed:

• Raspberry Pi Pico W ($6)
• DHT22 sensor ($5)
• Soil moisture sensor ($8)
• 6V solar panel ($10)
• 18650 battery + charger ($8)
• Total cost: ~$37