Deep sleep for esp32

Other Hardware 3rd Party Boards
1

Hi , i try to bring my microcontroller to deep sleep for 10 second on and 10 second off . However , when i put the deep sleep mode , the microcontroller seem not go into do the task of charge.cpp. It just on for 10seconds and off for 10 seconds.

Reason I want deep sleep is ;

To put the microcontroller in save power mode .

main code:

#include <Arduino.h>

#include "charge.h"

#define uS_TO_S_FACTOR 1000000ULL
#define TIME_TO_SLEEP 100


charge  battery ;




void setup() {
  
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  //set timer0 interrupt at 2kHz
  
  battery.begin();
 
  battery.check_voltage();



  esp_sleep_enable_timer_wakeup( TIME_TO_SLEEP *uS_TO_S_FACTOR );
  esp_deep_sleep_start();
}

void loop() {

}

charge.h :

#ifndef charge_h
#define charge_h




class charge {
  public:
  void begin();
  void check_voltage();
  void turnon_contactor();

};

#endif

charge.cpp :

#include "charge.h"
#include <Arduino.h>

float cell[10];
float total_cell_charge;
float difference_cell_charge;
int cell_pin[10] = { 12, 13 ,14,25,26,27,32,33,34,35 };


volatile int interruptCounter_charge;


hw_timer_t * timer1 = NULL;
portMUX_TYPE timerMux1 = portMUX_INITIALIZER_UNLOCKED;
 
void IRAM_ATTR onTimer1() {
  portENTER_CRITICAL_ISR(&timerMux1);
  interruptCounter_charge++;
  portEXIT_CRITICAL_ISR(&timerMux1);
 
}
void charge::begin(){

  pinMode (22 ,OUTPUT);
  timer1 = timerBegin(1, 80, true);
  timerAttachInterrupt(timer1 , &onTimer1, true);
  timerAlarmWrite(timer1, 2000000, true);
  timerAlarmEnable(timer1);

}

void charge::check_voltage(){
  if (interruptCounter_charge  > 0) {
 
    portENTER_CRITICAL(&timerMux1);
    interruptCounter_charge--;
    portEXIT_CRITICAL(&timerMux1);
  for (int check_cell = 0 ; check_cell++; check_cell < 10){
    for (int cell_pin_check = 0 ; cell_pin_check ++ ; cell_pin_check <10 ){
      cell [check_cell] =  analogRead(cell_pin[cell_pin_check]);
    }
 }
  
  total_cell_charge = cell[0]+cell[1]+cell[2]+cell[3]+cell[4]+cell[5]+cell[6]+cell[8]+cell[9] ;
  difference_cell_charge = cell[0]-cell[1]-cell[2]-cell[3]-cell[4]-cell[5]-cell[6]-cell[8]-cell[9];
  Serial.print("test voltage");
  Serial.print(total_cell_charge);
  }
}



void charge :: turnon_contactor(){
  if (total_cell_charge > 24 ) {
    digitalWrite(22, HIGH);
  } 

  if (total_cell_charge < 2 ) {

    digitalWrite(22,HIGH);
  } 



}
2

Have you considered using code tags when posting code?

A ESP32 is a 32 bit thingy. What size number do you expect with a ULL?

What does that mean?

Are you with issue that when the MCU has went into deep sleep it no longer preforms a function?

3

Size of number is 32 bit

So if i dont insert the deep sleep function the charge function work fine. However, when i put the deep sleep function, the charge function dont work anymore. What i want is to make the charge function to work with deep sleep.

4

What do you think the CPU is doing during deep sleep?

How many programs do you think are being are being run while in deepsleep?

5

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/sleep_modes.html?highlight=deep%20sleep

In Deep-sleep mode, the CPUs, most of the RAM, and all digital peripherals that are clocked from APB_CLK are powered off. The only parts of the chip that remain powered on are:

RTC controller

ULP coprocessor

RTC fast memory

RTC slow memory

When the CPU is powered off how many programs will the CPU be able to run without power?

6

Hi ,

what you mean is if I want to run the function , I will run sleep mode until something trigger then I wake it up and disable the sleep mode right?

7

The function cannot be running on a sleeping CPU.

The CPU can be sleeping, triggerd to awaken, runs a function, and then goes back to sleep.

8

could you please show me how to awake the cpu by timer ? I have look up some example and I use similar to example, however it not wake up the cpu.

here is the link that i use :

According to the link , they should able to count the number when wake up. However, when i put to my esp32 to test. It keep reset to initial. Thus , i believe this link dont wake up the cpu as well.

There also many link similar to this. Hence I not sure how to wake up cpu

9

could you, please, put your code in code tags?

10

At your side it not in tag? Cause at my side it does. That weird. You use

3 ` at both side to tag right?

11 
void fSleepyTime( void *pvParmeters )
{
  for (;;)
  {
    xEventGroupWaitBits (eg, evtSleepyTime, pdTRUE, pdTRUE, portMAX_DELAY );
    xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
    MQTTclient.disconnect();
    WiFi.disconnect();
    esp_sleep_enable_timer_wakeup( 60000000 ); // set timer to wake up once a minute 60000000uS
    esp_deep_sleep_start();
  }
  vTaskDelete( NULL );
} //void fSleepyTime( void *pvParmeters )
////

Notice I do not require a ULL?

Thank you for putting your code in code tags.

12

Have you tried to see if the sleepytime is working?

void setup() {
  
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  //set timer0 interrupt at 2kHz
  
  //battery.begin();
 
  //battery.check_voltage();


esp_sleep_enable_timer_wakeup( 60000000 );
  //esp_sleep_enable_timer_wakeup( TIME_TO_SLEEP *uS_TO_S_FACTOR );
  esp_deep_sleep_start();
}

????

13

I have try the sleep , it no different , the system just sleep and wake up in the 1sec duration.

The esp_sleep_enable_timer_wakeup( 60000000 ) should wake up every 1 minute right ?

14

what's the problem?

15 
Hello, ESP32!
ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1156
load:0x40078000,len:11456
ho 0 tail 12 room 4
load:0x40080400,len:2972
entry 0x400805dc
Hello, ESP32!
ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1156
load:0x40078000,len:11456
ho 0 tail 12 room 4
load:0x40080400,len:2972

The serial output like this. And the wake up happen in 1 sec which not what it should be .

16

Did you try the code from post12? Does it wake up once a second?

17

Yup I had tried the post 12 and 11 . I think i have limited reply post. I might edit this post to reply you if I reach restriction

18

And that code from post 11/12 only wakes up once a second?

19

Yes

20

I'm sorry I'll be unable to help you. Good luck.