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
RP2350 / Pico 2 machine.lightsleep not working correctly
Port, board and/or hardware
Pico 2 / RP2350
MicroPython version
MicroPython v1.24.0-preview.201.g269a0e0e1 on 2024-08-09; Raspberry Pi Pico2 with RP2350
Reproduction
- Install latest Firmware from https://micropython.org/download/RPI_PICO2/
- Implement
machine.lightsleep(5000)in your code - Run code.
Expected behaviour
Expected Pico 2 to enter lightsleep mode for 5 seconds, then continue to next bit of code.
Observed behaviour
lightsleep is maybe entered for a cycle or so, but code carries on and never stops executing for any time value I enter for lightsleep.
Additional Information
Complete code example:
# Lightsleep MicroPython example.
from machine import Pin
import time
led = Pin(25, Pin.OUT)
while True:
led.toggle()
time.sleep_ms(5000)
led.toggle()
machine.lightsleep(5000)
Code of Conduct
Yes, I agree