#-----------------------------------------------------------------------#
# Objectives:                                                              #                                                         
#    - Blink External LEDs                                              #
#    - Get and print temperature and pressure from DHT22 sensor         #
#    - Get and print temperature from onboard temperature sensor        #
#    - Blink Onboard LED                                                #
#                                                                       #
# Author: Drop Bos                                                      #
# Created Date: May-02-2025                                             #
# Updated Date: May-02-2025                                             #
#                                                                       #
# License: Apache-2.0                                                   #
#                                                                       #
# Copyright © 2025. Drop Bos. All Rights Reserved.                      #
# ----------------------------------------------------------------------#

from dht import DHT22
from utime import sleep
from machine import Pin, ADC, RTC


# 1. external leds
led_one = Pin(5, Pin.OUT)
led_two = Pin(9, Pin.OUT)
led_three = Pin(13, Pin.OUT)

# 2. DHT22 temp & press sensor
# connect GND.8 to dht1:GND                || GND  > Pin 38
# connect 3V3 to dht1:VCC (3V3(OUT))       || VCC  > Pin 36 
# connect GP28 to dht1:SDA (Data - GPIO28) || SDA > Pin 34
external_dht22 = DHT22(Pin(28))

# 3. onboard temp sensor
onboard_temp = ADC(4)  # onboard temp sensor (On ADC Channel)

# 4. onboard_led
onboard_led = Pin("LED", Pin.OUT)



def separator():
    print("--------------------")

def external_led_display(led_one=None, led_two=None, led_three=None):
    ready_to_stop = 7
    stop_go = 1
    ready_to_stop_sleep_interval = 7

    # ready to stop
    print("-- Ready to stop --")
    for index in range(ready_to_stop):
        led_one.on()
        sleep(1)
        led_one.off()
        sleep(1)


    # stop
    print("-- Stop --")
    for index in range(stop_go):
        led_two.on()
        sleep(ready_to_stop_sleep_interval)
        led_two.off()
        sleep(1)

    # go
    print("-- Go --")
    for index in range(stop_go):
        led_three.on()
        sleep(ready_to_stop_sleep_interval)
        led_three.off()
        sleep(1)
        separator()

def temp_press_display(sensor=None, seconds=None):
    sensor.measure() 
    temp = sensor.temperature()
    humd = sensor.humidity()
    temp_f = temp * (9/5) + 32.0
    separator()
    print(f"temp (C) is {temp}")
    print(f"temp (F) is {temp_f}")
    print(f"humd (%) is {humd}")
    separator()
    sleep(seconds)

def onboard_temp_value(sensor=None, seconds=None):
    """
        The in-built temp sensor measures the Vbe voltage of a biased bipolar diode, 
        connected to the fifth ADC channel. Vbe = 0.706V at 27 degrees C, with a 
        slope of -1.721mV (0.001721) per degree.
    """
    factor = 3.3 / 65535
    reading = sensor.read_u16() * factor
    temp = 27 - (reading - 0.706)/0.001721
    print(f"Board Temperature is: {temp} deg C")
    separator()
    sleep(seconds)
    
def onboard_led_display(sensor=None, seconds=None, blink_number=None):
    """
        Original "LED" pin is GPIO 25
        Unlike the original Raspberry Pi Pico, the on-board LED on Pico W is not
        connected to a pin on RP2040, but instead to a GPIO pin on the wireless chip.
        Hence, led = Pin("LED", Pin.OUT)  and not  Pin(25, Pin.OUT)
    """
    led = onboard_led
    print("-- Blinking Onboard LCD --")

    for index in range(blink_number):
        led.on()
        sleep(seconds)
        led.off()
        sleep(seconds)



while True:
    seconds = 1
    blink_number = 5
    external_led_display(led_one=led_one, led_two=led_two, led_three=led_three)
    print("-- Displaying Temp & Humd --")
    temp_press_display(sensor=external_dht22 , seconds=seconds)
    onboard_temp_value(sensor=onboard_temp, seconds=seconds)
    onboard_led_display(sensor=onboard_led, seconds=seconds, blink_number=blink_number)