Time and Temperature

code.py

# SPDX-FileCopyrightText: Copyright (c) 2024 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
#
# EQUIPMENT
## Adafruit Feather ESP32-S2 TFT
## CircuitPython 9.0.0 or 8.2.9
## FeatherWing Doubler https://www.adafruit.com/product/2890
import board
import displayio
import time
from adafruit_bitmap_font.bitmap_font import load_font
from adafruit_display_text.label import Label
from adafruit_display_shapes.circle import Circle
import adafruit_adt7410
import wifi
from socketpool import SocketPool
from adafruit_ntp import NTP
import rtc

display = board.DISPLAY
i2c = board.I2C()
therm = adafruit_adt7410.ADT7410(i2c)
METRIC = False

pool = SocketPool(wifi.radio)
ntp = NTP(pool, tz_offset=-7.0) # US/Denver
rtc.RTC().datetime = ntp.datetime

def get_time():
    now = time.localtime()
    a = f"{now.tm_year}-{now.tm_mon:02d}-{now.tm_mday:02d} "
    hour = now.tm_hour % 12
    if hour == 0: hour = 12
    b= f"{hour:02d}:{now.tm_min:02d}:{now.tm_sec:02d}"
    return a,b

def slowly(func, period=2.0):
    "rate limit decorator"
    check = time.monotonic() - period
    def _slowly(*args, **kwargs):
        nonlocal check
        now = time.monotonic()
        if now > check:
            check = now + period
            return func(*args, **kwargs)
        return None
    return _slowly

@slowly
def get_temp_C():
    "Temperature Celsius"
    T = therm.temperature
    return f"{T:0.1f} C"
@slowly
def get_temp_F():
    "Temperature Fahrenheit"
    T = therm.temperature * 1.8 + 32
    return f"{T:0.1f} F"

radius = 24
splash = displayio.Group()
cc = Circle(display.width*7//8, display.height//2, radius, outline=0xFFFFFF)
splash.append(cc)
font = load_font("/fonts/Arial-18.pcf")
clock = Label(font, text="----",
              color=0xFFFF66,
              x=display.width//8,
              y=display.height*7//8)
splash.append(clock)
temperature = Label(font, text="10.0 K",
                    color=0x3333FF,
                    x=display.width//8,
                    y=display.height*3//8)
splash.append(temperature)
display.root_group=splash

def loop():
    clock.text = get_time()[1]
    if METRIC:
        temperature.text = get_temp_C() or temperature.text
    else:
        temperature.text = get_temp_F() or temperature.text
    time.sleep(0.1)
    
if __name__=="__main__":
    while True: 
        loop()