#L9d - Program reglare umiditate sol
# 
# Se porneste mototul  pompei  daca umiditatea
# este redusa. 
# Sensorul de umiditate este conectat la ADC1, pin 32 (GP27)
# Cursorul potentiometrului este conectat ADC0,  pin 31 (GP26)
# Motorul de tip DC al pompei este controlat prin ULN28003, pin 21 (GP16)
#-------------------------------------------------- 
# LCD de tp Nokia 5110 conectat la SPI
# Utilizeaza  micropython-pcd8544_fb.py 
#-----------------------------------------------

import pcd8544_fb
from machine import Pin, SPI
from utime import sleep

spi=SPI(1)  # implicit foloseste sck-GP10, mosi-GP11
            # miso -GP8, baud=1900000,
spi.init(baudrate=1000000,polarity=0,phase=0)

cs = Pin(14, Pin.OUT)
dc = Pin(15,Pin.OUT)
rst= Pin(13,Pin.OUT)
back_light = Pin(9,Pin.OUT,value=1)
lcd=pcd8544_fb.PCD8544_FB(spi,cs,dc,rst)
led=Pin(25, Pin.OUT)
motor=Pin(16, Pin.OUT)     # motor DC pompa irigatie

a_sensor=machine.ADC(26)   # cursor potentiometru la pin 31
hum=machine.ADC(27)        # sensor umiditate sol
#----------------------------------------------------
motor.off()    # pompa oprita
while 1:
    led.off()
    s=a_sensor.read_u16()      # lectura date 16 biti
    # s=hum.read_u16()         # sensor umiditate 
    v=s*3.3/67780              # valoare in volti calibrata
    print(s)
    if s<13000:
        motor.on()             # activare motor irigare
        sleep(0.5)
    motor.off()                # stop motor irigare
    lcd.fill(0)                # clear dsplay Nokia 5110
    sleep(0.5)  

    lcd.text("SM lab.9 ",2,0,1)     # afisare linia 9, col. 0, 1=vizibil
    
    lcd.text("Humidity ",0,18,1)    # afisare col. 19
    lcd.text("   Sensor:",0,27,1) 
    #lcd.text(str(v),10,40,1)       # afisare numar
    lcd.text(str('{:.2f}'.format(v)),10,40,1) # afisare cu 2 zecimale 
    lcd.clear()                        
    lcd.show()                          # actualizare display
    led.on()
    sleep(0.5)