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Waijung 2 User Guide

How do these blocks appear in a Simulink model?

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What can be configured?

sleep-modes

Configuration Parameter

Selectable Option/Value

Description

Sleep mode

Light sleep--Deep sleep

Select sleep mode

Additional power option

Check--Uncheck

Enable additional power option for the user to control

RTC peripherals

Auto-On-Off

Set power to RTC peripherals. This will override if ext0 or ext1 is selected

RTC slow mem

Auto-On-Off

Set power to RTC slow memory

RTC fast mem

Auto-On-Off

Set power to RTC fast memory

Disable BT

Check--Uncheck

Select to disable BT by calling these functions esp_bluedroid_disable(), esp_bt_controller_disable()

BT connections will not be maintained in deep sleep or light sleep modes

Disable WiFi

Check--Uncheck

Select to disable WiFI by calling esp_wifi_stop() function

WiFi connections will not be maintained in deep sleep or light sleep modes

Timer

Check--Uncheck

Select timer as a wake-up source. Wake-up timer will be the base time of the Simulink model.

External wake-up(EXT0)

Check--Uncheck

Select ext0 as a wake-up source. Set of configuration parameters will open to set up this.

External wake-up(EXT1)

Check--Uncheck

Select ext1 as a wake-up source. Set of configuration parameters will open to set up this.

Wake-up ext0 pin

RTC_GPIO_0 to RTC_GPIO_17 for ESP32

RTC_GPIO_0 to RTC_GPIO_21 for ESP32S2 & ESP32S3

Select ext0 wake-up pin.

esp32 - https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/gpio.html

esp32s2 - https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/api-reference/peripherals/gpio.html

esp32s3 - https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/gpio.html

Wake-up ext0 mode

High--Low

Input level which will trigger the wakeup

Internal pullup or pulldown for ext0

None--Pull-up--Pull-down

Select internal pullup or pulldown for the ext0 pin. If "None" is selected external pullup or pull down need to be set.

Wake-up ext1 pins

 

Can select multiple pins to trigger wakeup from ext1.

Use table to select pins and internal pullup/pulldown for the respective ext1 pin.

Wake-up ext1 mode

Wake up any high--Wake up all low

Select logic function used to determine wakeup condition

Wake up any high - wake up when any of the selected pins are high

Wake up all low - wake up when all selected GPIOs are low

Output previous wakeup reason

Check--Uncheck

Output wakeup reason from a port

INPUT/ OUTPUT Port

Port Name

Port Type

Date Type

Range

Description

wakeup reason

Scalar

uint8

Expected values 0 or 12

Wakeup reason to the respective number can be found in here

When to use this block?

This block implements sleep modes to save some power in some applications.

How does this block work?

Using this block will allow the user to put the esp32 to a given sleep mode such that the power consumption of the chip will drastically goes down. Make sure either one of the wake-up modes is enabled otherwise it won't go to sleep.

Description

Light sleep mode, digital peripherals, most of the RAM, and CPUs are clock-gated, and supply voltage is reduced. Upon exit from light sleep, peripherals and CPUs resume operation, their internal state is preserved.

Deep sleep mode, CPUs, most of the RAM, and all the digital peripherals which are clocked from APB_CLK are powered off. The only parts of the chip which can still be powered on are:

RTC controller

RTC peripherals

ULP coprocessor

RTC fast memory

RTC slow memory

 

Note: In deep sleep and light sleep modes, wireless peripherals are powered down

 

If the wake-up method is selected to timer it will wake up for "base sample time" of the Simulink project. Deep sleep mode chip will acts as a reboot when it wake-up from sleep. Variables in the Simulink model might reset due to this situation.

Find respective RTC_GPIO pin number to GPIO pin

ESP32

ESP32S2

ESP32S3

Demo

Demo file : esp32_sleep_with_wifi_sntp_demo.slx

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WIFI Subsytem:

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SNTP Subsystem:

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Description

This example shows how to use the Sleep Mode block with a Simulink project.

What should be happening?

Once WiFi is connected it will give the connection info by the serial monitor(baud rate - 115200). Next, it will try to synchronize the time from the sntp block. Once it has been synchronized it will output the time for the serial monitor and go to deep sleep mode. Sleep Mode block is set to ext0 as the wake-up mode so until the RTC_GPIO pin is triggered high this will stay sleep. If the wake-up signal is triggered It will do the previous steps as mentioned.

Hardware Setup

1. ESP32

2. Resistor(~1k)

3. Push button

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