""" Program 12-4: Thermometer display using SSD1306 OLED"""

import time
from machine import ADC, Pin
from ssd1306 import SSD1306

# Instatiate a display object
display = SSD1306()

# Thermometer code from Program 7-3
LM34 = ADC(Pin(27))   # instantiate an ADC object using GP27 pin.

while True:
    value = LM34.read_u16()    # read a conversion result
    value &= 0xFFF0            # mask out the lower bits
    mV = value * 3300 / 65520  # convert to millivolts
    temp = mV / 10             # LM34 has the output of 10mV per degree F
    temp_text = f'{temp:3.1f} F'    # MicroPython v1.17 or later
    print(temp_text)           # display temperature at REPL terminal

    # Display temperature on the OLED
    display.fill(display.BLACK)
    display.text('Temperature', 15, 20, display.WHITE)
    display.text(temp_text, 35, 40, display.WHITE)
    display.flush()

    time.sleep(1)