ESP32 C3 Super mini can't use PWM 1Hz error E (810) ledc: freq_hz=1 duty_resolution=0 ?

[Witawat]

i try code PWM mode

frequency = 1 # PWM 1Hz
pwm = PWM(Pin(pwm_pin), freq=frequency, duty=0)

On runing error

Type 'help()' (without the quotes) then press ENTER.
E (810) ledc: freq_hz=1 duty_resolution=0
Traceback (most recent call last):
File "main.py", line 46, in
OSError: (-258, 'ESP_ERR_INVALID_ARG')
MicroPython v1.24.1 on 2024-11-29; ESP32C3 module with ESP32C3

[robert-hh]

Each port has a different lowest PWM frequency. For ESP32C3 it's 5Hz. For 1Hz you may use the Timer mechanism.