#!/usr/bin/python
# From https://raspberry.tips/en/raspberrypi-tutorials/raspberry-pi-gpio-python
import lgpio
import time

# Open GPIO chip (0 = /dev/gpiochip0, on Pi 5 gpiochip4 also possible)
h = lgpio.gpiochip_open(0)

try:
    lgpio.gpio_claim_output(h, 16)   # GPIO16 as output (MOTA2)
    lgpio.gpio_write(h, 16, 0)   # LOW

    # Hardware PWM on GPIO18 (pin 12) must be PWM-capable
    # Frequency: 1000 Hz, duty cycle: 50%
    lgpio.tx_pwm(h, 18, 1000, 50)
    time.sleep(2)

    # Reduce duty cycle to 20%
    lgpio.tx_pwm(h, 18, 1000, 20)
    time.sleep(2)

    lgpio.tx_pwm(h, 18, 0, 0)   # Stop PWM
    
finally:
    lgpio.gpiochip_close(h)          # Always close!