I don't use UIFlow, so I had to do a little detective work to figure out how to do the equivalent in the Arduino framework. AFAIK, Arduino doesn't know anything about "hold", and you have to call an ESP32 native function to achieve it.

Here's what worked for me:

pinMode(4, OUTPUT);
digitalWrite(4, HIGH);
gpio_hold_en(GPIO_NUM_4);  // this is the interesting line
esp_sleep_enable_timer_wakeup(6 * 1000 * 1000);
esp_deep_sleep_start();

*) if it works 😏

I don't have an M5StickCPlus2 so I cannot do the necessary measurements. But in the past I measured the M5Paper power consumption for both sleep and shutdown modes. Please see here. The power consumption in shutdown mode (only RTC running) drops to about 2.7 uA.

Thanks
Felix

the HOLD pin (GPIO4) needs to stay high during deep sleep to keep the ESP32 powered.
Try the following to keep the value of the HOLD pin during deep sleep:
from machine import Pin, deepsleep
Pin(4, Pin.OUT, value=1, pull=Pin.PULL_HOLD) # HOLD PIN - UIFlow1
#Pin(4, Pin.OUT, value=1, hold=True) # HOLD PIN - UIFlow2
deepsleep(20000)

Here the system power is kept on - how is the power consumption compared to when only the BM8563 RTC is powered?

I had a look at the UIFlow 1.x for M5stickC Plus 2 and there are some functions under RTC where you can set timeout and interrupt. I think you might bee able to do the following:

• Enable timer interrupt (from RTC section)
• set timer value (from RTC section)
• power off (from Power section)

the HOLD pin (GPIO4) needs to stay high during deep sleep to keep the ESP32 powered.
Try the following to keep the value of the HOLD pin during deep sleep:

from machine import Pin, deepsleep
Pin(4, Pin.OUT, value=1, pull=Pin.PULL_HOLD) # HOLD PIN - UIFlow1
#Pin(4, Pin.OUT, value=1, hold=True) # HOLD PIN - UIFlow2
deepsleep(20000)

Note: verified with an M5Paper which has a similar power architecture.

Thanks
Felix

The problem is that I created a fairly large project in Flow 1.13 using functions that are not in Flow 2. Therefore, the question is rather how to implement deep sleep specifically in Flow 1.13. And I don't understand why the standard function doesn't work(

The whole project is written in blocks in flow and in python I want to finish writing a deep sleep.

You should use the Power.timerSleep(sec) which is a part of the "built-in" M5 library.

A tip if you are programming directly in Micropython and uploading via the serial port. You can use the UIFlowl web site as a kind of "API-reference". Go in and find the UIFlow "brick/function" you'll like to use and then see what Micropython code it generates.Here is an example: