# https://docs.micropython.org/en/latest/esp32/quickref.html
#
# Heltec ESP32 LoRa V3 must be connected via USB
#
# run with
# $ mpremote run esp32_demo.py
# 
# hhoegl, 2024-07-14 

from machine import Pin, ADC 
import time
import esp32

for i in range(5):
    print(i)

print("Hello Dillingen!")

print()

t = esp32.mcu_temperature()
print(f"The MCU temperature is {t} °C")

MAXBLINK = 5
print(f"See the LED blinking {MAXBLINK} times on and off ...")

led = Pin(7, Pin.OUT)
i = 0
while i < MAXBLINK:
    print(f"   LED on {i}")
    led.on()
    time.sleep_ms(500)
    print(f"   LED off {i}")
    led.off()
    time.sleep_ms(500)
    i = i + 1

# XXX does not work!
adc = ADC(1)  # pin GPIO1 is ADC1_CH0
val = adc.read()
print("ADC value:", val)

print("Finally press the button...")
button = Pin(6, Pin.IN, Pin.PULL_UP)
while button.value() == 1:
   time.sleep_ms(50)
print("Button pressed!  Thank you.")