#   Project: analog_sensor input wigth output on LCD screen.
#   Project Description:
#   This sketch writes the readings read from analog_sensor onto a LCD screen.
#   This sketch is for a Raspberrypico and LCD 4x20
# 
#   Author: STEMVentor Educonsulting
#   
#   This code is copyrighted. Please do not reuse or share for any purpose other than for learning with subscribed STEMVentor programs.
#   This code is for educational purposes only and is not for production use.


# LIBRARIES
# The machines library is a basic library which is built in the raspberry pico. 
# It lets one use access and control the pins of the pico using basic functions and commands
from machine import I2C, Pin , ADC 
from time import sleep #so that sleep funciton can be used , similar to delay in arduino ide.
from pico_i2c_lcd import I2cLcd 
# PIN DEFINITIONS
analog_sensor_pin = 28
# INITIALIZE OBJECTS
i2c_connection = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
I2C_ADDR = i2c_connection.scan()[0] #to get the I2C address
lcd = I2cLcd(i2c_connection, I2C_ADDR, 4, 20) #create lcd object

analog_sensor_adc = ADC(Pin(analog_sensor_pin))
# LOCAL FUNCTIONS 
def printByRow( string , row_number): #row number is from 0-4
    lcd.move_to(0 , row_number)
    lcd.putstr("                    ") #print 20 blank spaces to clear the row
    lcd.move_to(0 , row_number)
    lcd.putstr(string)

# MAIN CODE
print(I2C_ADDR)
lcd.backlight_on()
printByRow("analog sensor value: " , 0)
while True:
    value  = analog_sensor_adc.read_u16()
    print(" analog_sensor value : "  , value)
    printByRow(str(value) , 2)
    sleep(1)