# ex_3_5_05_oled_dht22.py (จำลอง: https://wokwi.com/projects/469817988933583873)
from machine import Pin, I2C
import ssd1306
import dht
import time

i2c = I2C(0, sda=Pin(21), scl=Pin(22), freq=400000)
oled = ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3c)
sensor = dht.DHT22(Pin(25))

while True:
    try:
        sensor.measure()
        t = sensor.temperature()
        h = sensor.humidity()
        oled.fill(0)                                   # วาดใหม่ทั้งเฟรมทุกรอบ
        oled.text("Farm Monitor", 0, 0)
        oled.text("T: {:.1f} C".format(t), 0, 24)
        oled.text("H: {:.1f} %".format(h), 0, 40)
        oled.show()
    except OSError:
        oled.fill(0)
        oled.text("Sensor Error!", 0, 24)
        oled.show()
    time.sleep(2)