QUERY · ISSUE

ESP32 module wake on touch, wake on ext1

openby tahouseopened 2018-08-17updated 2019-05-28

port-esp32

Hi there,

I'm running MicroPython v1.9.4-409-g434975def and have successfully used a Pin irq to wake from deep sleep and can confirm the wake reason:

import machine
from machine import Pin, TouchPad, deepsleep
import time

wake = Pin(14, mode = Pin.IN, pull = Pin.PULL_DOWN)
wake.irq(trigger=Pin.WAKE_HIGH, wake = machine.DEEPSLEEP)

time.sleep(5)
deepsleep(5*1000)

after bringing Pin 14 line up to 3V3

Reset cause:  DEEPSLEEP_RESET
Wake reason:  PIN_WAKE/EXT0_WAKE

Now I'm trying to do the same but with a TouchPad input:


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

wake = Pin(14, mode = Pin.IN)
touch = TouchPad(wake)
touch.config(500)
esp32.wake_on_touch(True)

time.sleep(5)
deepsleep(5*1000)

(after 5 seconds and touching/untouching wire to Pin 14)

Reset cause:  DEEPSLEEP_RESET
Wake reason:  TIMER_WAKE

The range of my touch.read() values are around 700 when untouched, and down to around 100 when touched. I've tried adjusting the touch.config to various settings but I cannot get my ESP32 to wake from touch.. only from timer in this mode.

Lastly,
I've tried using wake_on_ext1

import machine
from machine import Pin, TouchPad
import time
import esp32
wake = Pin(14, mode = Pin.IN, pull = Pin.PULL_DOWN)
esp32.wake_on_ext1(pins = [wake], level = Pin.WAKE_HIGH)

time.sleep(5)
deepsleep(5*1000)

But this resets immediately regardless of whether I bring Pin 14 high or not (not in touch mode, mind you).

Reset cause:  DEEPSLEEP_RESET
Wake reason:  EXT1_WAKE

I've browsed through the esp32 module code, but I'm not sure if any of the wake modes work?

Any ideas?

CANDIDATE · ISSUE

ESP32 S2 or S3 , can not from machine import TouchPad

closedby Wind-stormgeropened 2021-11-30updated 2024-03-02

port-esp32

I built the firmware under the following conditions:
ESP-IDF v5.0-dev-517-g68cf4ef2be
MicroPython v1.17-212-g23a150789-dirty

I tested on esp32, esp32s2 and esp32s3 chips，Touchpad module is only available on esp32.

When I enter this code in repl:

from machine import TouchPad

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: can't import name TouchPad

So I further confirm whether it exists:

>>> import machine
>>> machine.
ADC             DAC             DEEPSLEEP       DEEPSLEEP_RESET
EXT0_WAKE       EXT1_WAKE       HARD_RESET      I2C
I2S             PIN_WAKE        PWM             PWRON_RESET
Pin             RTC             SLEEP           SOFT_RESET
SPI             Signal          SoftI2C         SoftSPI
TIMER_WAKE      TOUCHPAD_WAKE   Timer           UART
ULP_WAKE        WDT             WDT_RESET       bitstream
deepsleep       disable_irq     enable_irq      freq
idle            lightsleep      mem16           mem32
mem8            reset           reset_cause     sleep
soft_reset      time_pulse_us   unique_id       wake_reason
>>> machine.

What is hard to understand is , TOUCHPAD_WAKE is still there, but the TouchPad is gone?!

I reconfirmed that touchpad has been supported on esp32s2 and s3

https://github.com/micropython/micropython/blob/23a150789df1029def2a26cb757e7d6703520159/ports/esp32/machine_touchpad.c#L59-L62

I'm not sure if there's anything I haven't checked.

Hope to get some inspiration or help.

ESP32 module wake on touch, wake on ext1

ESP32 S2 or S3 , can not from machine import TouchPad

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