ESP32-S3 PWM in lightsleep mode does not works as expected
Port, board and/or hardware
ESP32S3
MicroPython version
MicroPython v1.26.0 on 2025-08-09; Generic ESP32S3 module with ESP32S3
Reproduction
import esp32
from machine import Pin, I2C, ADC, Timer, PWM, deepsleep, lightsleep
from neopixel import NeoPixel
import time
# Internal Led
INTERNAL_LED = const(47)
PWM_PIN_NORMAL = 1
PWM_PIN_SLEEP = 12
# Init
LED = NeoPixel(Pin(INTERNAL_LED, Pin.OUT), 1)
# Test 26 Version
# On ESP32-S3 : the pwm_ligthsleep goes to 1 when ligthsleep
pwm1 = PWM(Pin(PWM_PIN_SLEEP), freq=5000, duty_u16=32768, lightsleep=True)
pwm0 = PWM(Pin(PWM_PIN_NORMAL), freq=5000, duty_u16=32768)
# Init : LED = Blue
LED[0] = (0,0,32)
LED.write()
time.sleep_ms(10*1000) # Wait 10 Sec
while True:
LED[0] = (32,0,0) # Green
LED.write()
time.sleep_ms(10*1000) # Wait 10 Sec
LED[0] = (0,64,0) # Red
LED.write()
lightsleep(10*1000)
Expected behaviour
The option set on the pwm1 instance (lightsleep=True) should keep the pwm signal on while the ESP32 is in ligthsleep.
But when performing the test we see that the pwm1 pin goes to high value when the ESP32 enter in ligthsleep.
Observed behaviour
I've worked on this subject (https://github.com/micropython/micropython/pull/10854) and (https://github.com/micropython/micropython/pull/16102). On my local repository, I reloaded an old firmware with the same machine_pwm.c (ESP port) code as in the current repository, and it is working as expected! I haven’t yet found the difference - maybe it’s related to the IDF framework version ?
Additional Information
No, I've provided everything above.
Code of Conduct
Yes, I agree
lightsleep on Pico W regression for 1.24.0
Port, board and/or hardware
PICO W
MicroPython version
Micropython 1.24.0
Reproduction
Micropython 1.23.0 can run that code:
import machine
import time
led = machine.Pin("LED", machine.Pin.OUT)
led.off()
while True:
print("Loop instance")
led.on()
time.sleep(0.1)
led.off()
machine.lightsleep(10000)
it will sleep for 10s.
if you try the same with 1.24.0 there is absolutely no sleep at all. the string Loop instance just appears every 0.1 seconds
Expected behaviour
machine.lightsleep to do something on 1.24.0
Observed behaviour
machine.lightsleep do something on 1.23.0 but not 1.24.0
Additional Information
No, I've provided everything above.
Code of Conduct
Yes, I agree