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Summary

I was add deepsleep wakeup by gpio on ESP32C3.

new function and const in esp32 module:

• wake_on_gpio([machine.Pin],level])

level

• WAKEUP_GPIO_HIGH
• WAKEUP_GPIO_LOW

almost same esp32.wake_on_ext1 and esp32.wake_on_ext0

And I was tuned struct machine_rtc_config_t in machine_rtc.h file by soc selector in ports/esp32:

• SOC_GPIO_SUPPORT_DEEPSLEEP_WAKEUP
• SOC_PM_SUPPORT_EXT0_WAKEUP
• SOC_PM_SUPPORT_EXT1_WAKEUP
• SOC_ULP_SUPPORTED
• SOC_TOUCH_SENSOR_SUPPORTED

And I also changed some files that came with it.

Testing

• build test:
  build-ESP32_GENERIC
  build-ESP32_GENERIC_C3
  build-ESP32_GENERIC_C6
  build-ESP32_GENERIC_S2
  build-ESP32_GENERIC_S3

ESP_IDF_VERSION=5.2
on MAC-OS

• deepsleep wakeup test:
  ESP32_GENERIC_C3 on seeed xiao-esp32c3

test micropython code

import time
import time
import esp32
from machine import Pin,deepsleep,PWM

pwm = PWM(5,freq=50)
hz0=400
pwm.duty_u16(0x800)
pwm.freq(hz0)
time.sleep(10) # you can connect while 10sec.
a=Pin(2,Pin.IN,pull=Pin.PULL_UP,hold=True)
b=Pin(3,Pin.IN,pull=Pin.PULL_UP,hold=True)
c=Pin(4,Pin.IN,pull=Pin.PULL_UP,hold=True)
esp32.wake_on_gpio([b,c],esp32.WAKEUP_GPIO_HIGH)
esp32.wake_on_gpio([a],esp32.WAKEUP_GPIO_LOW)
deepsleep(60_000) # 60sec
# deepsleep() # forever 

Trade-offs and Alternatives

Depending on the soc feature, the functions and constants available to the micropython esp32 module change.
Therefore, the python code becomes more device-dependent.

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