Hello,

I want to mount the M5stack on a backplane.
I want to use an I2C GPIO Expander which will be connected to the M5Stack grove connector.
Can I power the M5Stack with the grove connector?

Will the battery be maintained on charge?

Best regards.

Pierre

Hello Crami25,

Thank you for your help.
I took the time to try, to test.

For sleep, it's OK.
I made a small example but it doesn't work every time ???

On the other hand, I wish to wake up with the buttons.
I've searched the schematics:
Button A GPIO39
Button B GPIO38
Button C GPIO37

Following the example of this site:
https://randomnerdtutorials.com/esp32-external-wake-up-deep-sleep/

ext0
In this example, the ESP32 wakes up when the GPIO 33 is triggered to high:

esp_sleep_enable_ext0_wakeup(GPIO_NUM_33,1); //1 = High, 0 = Low
Instead of GPIO 33, you can use any other RTC GPIO pin.

#include <M5Stack.h>

#define uS_TO_S_FACTOR 1000000 /* Conversion factor for micro seconds to seconds /
#define TIME_TO_SLEEP 10 / Time ESP32 will go to sleep (in seconds) */
//#define BUTTON_PIN_BITMASK 0x8000000000

void setup()
{
Serial.begin(115200);
M5.begin(true, false, true);
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
Serial.println("Setup ESP32 to sleep for every " + String(TIME_TO_SLEEP) + " Seconds");

esp_sleep_enable_ext0_wakeup(GPIO_NUM_39,0); //1 = High, 0 = Low

//esp_deep_sleep_start(); //entre en someil profond

}

void loop() {

M5.update();// update button state

if (M5.BtnA.wasReleased())
{
esp_sleep_enable_ext0_wakeup(GPIO_NUM_39,0); //1 = High, 0 = Low
}

if (M5.BtnB.wasReleased())
{
esp_deep_sleep_start(); //entre en someil profond
}

if (M5.BtnC.wasReleased())
{
M5.Lcd.fillScreen(WHITE);
M5.Lcd.setTextColor(BLUE);
M5.Lcd.setBrightness(100);
M5.Lcd.setTextSize(2);
M5.Lcd.setCursor(40, 60);
M5.Lcd.print("Temperature: ");
}
}

@m5er said in Display on during deep sleep?:

dernières valeurs et se réveille toutes les X minutes pour mettre à jour les mesures; affichage du nombre d'abonnés twitter, de likes, de visites de pages, etc. Dans tous ces cas d'utilisation, il est utile de laisser le CPU dormir la plupart du temps pendant que l'affichage reste allumé.
Dans tous les cas, ce serait bien si quelqu'un pouvait présenter une solution de travail. Ce n'est probablement que quelques lignes de code, mais je n'arrive pas à trouver les bonnes.

Hello,

I'm editing this old post... Do you have a solution?

Pierre

Hello,

Can we use "Visual Studio Core" instead of the Arduino IDE?

Thank you in advance,

Pierre