# Display DHT22 readings in 0.96 OLED display
# Date: October 1, 2020

# Import the machine module to access the pins
import machine
# Import the time module for the intervals
import time

# OLED display initializations
import ssd1306
scl = machine.Pin(22, machine.Pin.OUT, machine.Pin.PULL_UP)
sda = machine.Pin(21, machine.Pin.OUT, machine.Pin.PULL_UP)
i2c = machine.I2C(scl=scl, sda=sda, freq=400000)
oled = ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3C)

# DHT sensor initializations
import dht
d = dht.DHT22(machine.Pin(23))
# If you will use DHT11, change it to:
# d = dht.DHT11(machine.Pin(23))

# Simple function for displaying the 
# humidity and temperature readings
# in the OLED display
def display_reads():
	# Get the DHT readings
    d.measure()
    t = d.temperature()
    h = d.humidity()
    
    # Clear the screen by populating the screen with black
    oled.fill(0)
    # Display the temperature
    oled.text('Temperature *C:', 10, 10)
    oled.text(str(t), 90, 20)
    # Display the humidity
    oled.text('Humidity %:', 10, 40)
    oled.text(str(h), 90, 50)
    # Update the screen display
    oled.show()
    
    # Or you may use the REPL
    print('Temperature:', t, '*C', ' ', 'Humidity', h, '%')


INTERVAL = 2000			# Sets the interval to 2 seconds
start = time.ticks_ms() # Records the current time
display_reads()			# Initial display	

# This is the main loop
while True:
	# This if statements will be true every
    # INTERVAL milliseconds, for this example,
    # it will trigger every 2 seconds since 
    # DHT22 samples every 2 seconds interval
    if time.ticks_ms() - start >= INTERVAL:
    	# Update the display
        display_reads()		
        # Record the new start time
        start = time.ticks_ms()
# Import the machine module to access the pins
import machine
# Import the time module for the intervals
import time

# OLED display initializations
import ssd1306
scl = machine.Pin(22, machine.Pin.OUT, machine.Pin.PULL_UP)
sda = machine.Pin(21, machine.Pin.OUT, machine.Pin.PULL_UP)
i2c = machine.I2C(scl=scl, sda=sda, freq=400000)
oled = ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3C)

# BMP180 sensor initializations
from bmp180 import BMP180
bmp = BMP180(i2c)
bmp.oversample_sett = 2
bmp.sealevel = 1013.25

# Simple function for displaying the 
# temperature and pressure readings
# in the OLED display
def display_reads():
    # Get the BMP180 readings
    temp = bmp.temperature
    pressure = bmp.pressure
    
    # Clear the screen by populating the screen with black
    oled.fill(0)
    # Display the temperature
    oled.text('Temp (C):', 10, 10)
    oled.text(str(temp), 90, 10)
    # Display the pressure
    oled.text('Pressure (hPa):', 10, 30)
    oled.text(str(pressure), 90, 40)
    # Update the screen display
    oled.show()
    
    # Or you may use the REPL
    print('Temperature:', temp, '*C', ' ', 'Pressure', pressure, 'hPa')


INTERVAL = 2000         # Sets the interval to 2 seconds
start = time.ticks_ms() # Records the current time
display_reads()         # Initial display    

# This is the main loop
while True:
    # This if statements will be true every
    # INTERVAL milliseconds, for this example,
    # it will trigger every 2 seconds
    if time.ticks_ms() - start >= INTERVAL:
        # Update the display
        display_reads()        
        # Record the new start time
        start = time.ticks_ms()