from lcd import*
from machine import ADC,time_pulse_us
from time import sleep,sleep_us
from math import log
BETA = 3950

echo = Pin(19, Pin.IN)
trigger = Pin(22, Pin.OUT)
ntc = ADC(Pin(28))

lcd_start()


def get_distance():
    trigger.value(1)
    sleep_us(10)
    trigger.value(0)
    timing=time_pulse_us(echo,1,1000000)
    if timing<0:
        print("error measurement")
    else:
        distance=timing/58
        print("distance",distance,"   cm    ")

    cmd_wrt(0x80)
    string_write("DIS:")
    string_write(str(int(distance)))
    string_write("cm")

    if distance >10:
        
        string_write(" FAR ")
    else:
        
        string_write("   NEAR")
    
    

def get_temp():
    nilai=ntc.read_u16() #to get reading in 						digital						voltage 
    celsius = 1 / (log(1 / (65535.00 / nilai - 1)) / BETA + 1.0 / 298.15) - 273.15;
    print("temperature",celsius,"   ^C")

    cmd_wrt(0xc0+0)
    string_write("TEMP:")
    string_write(str(int(celsius)))
    string_write("^C")

    if celsius >30:
        
        string_write(" HOT ")
    else:
        
        string_write(" COLD")

    

lcd_start()

while 1:
    get_distance()
    get_temp()
    sleep(0.2)