Here is a working code example:

/*

• Test of IP5306 functions
  */

#include <M5Stack.h>

void setup()
{
// initialize the M5Stack object
M5.begin();
Wire.begin(); // required to access IP5306
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(0, 10);
M5.Lcd.setTextColor(WHITE);
M5.Lcd.setTextSize(2);
M5.Lcd.printf("IP5306 Function Test\r\n");

if(!M5.Power.canControl())
{
M5.Lcd.setTextColor(RED);
M5.Lcd.printf("No communication with IP5306 chip");
while(1);
}
}

void loop()
{
M5.Lcd.fillRect(0,180,360,60,0);
uint8_t bat = M5.Power.getBatteryLevel();
M5.Lcd.setCursor(0,180);
if (M5.Power.isCharging()) M5.Lcd.printf("Battery is charging\r\n");
else M5.Lcd.printf("Battery is not charging\r\n");
M5.Lcd.printf("Battery Level %d", bat);
M5.Lcd.progressBar(0, 220, 360, 20, bat);
delay(5000);
}

Hi, doesn't compile for me!!!

this is the arduino IDE output:

Arduino: 1.8.7 (Mac OS X), Board: "M5Stack-Core-ESP32, QIO, 80MHz, Default, 921600, None"

Build options changed, rebuilding all
/Users/AD/Documents/Arduino/libraries/M5Stack/src/utility/Power.cpp: In member function 'void POWER::powerOFF()':
/Users/AD/Documents/Arduino/libraries/M5Stack/src/utility/Power.cpp:361:28: error: 'gpio_deep_sleep_hold_dis' was not declared in this scope
   gpio_deep_sleep_hold_dis();

                            ^
Multiple libraries were found for "SPI.h"
 Used: /Users/AD/Documents/Arduino/hardware/espressif/esp32/libraries/SPI
 Not used: /Users/AD/Documents/Arduino/libraries/SPI
Multiple libraries were found for "SD.h"
 Used: /Users/AD/Documents/Arduino/hardware/espressif/esp32/libraries/SD
 Not used: /Users/AD/Documents/Arduino/libraries/SD
 Not used: /private/var/folders/f3/0kf10ljj6sj4q4twsw_vtxrw0000gn/T/AppTranslocation/395E70C5-F1F6-4076-AA11-9C132A2C6ACF/d/Arduino 1.8.7.app/Contents/Java/libraries/SD
exit status 1
Error compiling for board M5Stack-Core-ESP32.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

tnks

/*

• Test of IP5306 functions
  */

#include <M5Stack.h>

void setup()
{
// initialize the M5Stack object
M5.begin();
Wire.begin(); // required to access IP5306
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(0, 10);
M5.Lcd.setTextColor(WHITE);
M5.Lcd.setTextSize(2);
M5.Lcd.printf("IP5306 Function Test\r\n");

if(!M5.Power.canControl())
{
M5.Lcd.setTextColor(RED);
M5.Lcd.printf("No communication with IP5306 chip");
while(1);
}
}

void loop()
{
M5.Lcd.fillRect(0,180,360,60,0);
uint8_t bat = M5.Power.getBatteryLevel();
M5.Lcd.setCursor(0,180);
if (M5.Power.isCharging()) M5.Lcd.printf("Battery is charging\r\n");
else M5.Lcd.printf("Battery is not charging\r\n");
M5.Lcd.printf("Battery Level %d", bat);
M5.Lcd.progressBar(0, 220, 360, 20, bat);
delay(5000);
}

I got also documentation for power management

https://docs.m5stack.com/#/en/api/power?id=getbatterylevel

clear and comprehnesive

all ok issue "solved"

Davide

If you are getting an understanding of the power management of the IP5306, would you mind helping me write it up for my book please?
You will be credited for the information in the book.

https://docs.m5stack.com/#/en/api/power?id=getbatterylevel

clear and comprehnesive

all ok issue "solved"

Davide

most important that now I have more understanding of power management and the fact I can control battery via SW is very important (M5stack is perfect for portable applications battery pwered)

could be VERY USEFUL a sort of translation of IP5306 Chinese data sheet
there are few register that provide info but not able to unerstand the usage !!

from various source I undertand that
0x78 provides battery level (25/50/75/100)
0x71 battery charging level (but not sure)
what about the other registers ? what about control register ??

simple table with register and functions/value will help a lot "non Chinese" speaking people
hope to see soon in the documentation !

thanks

Davide

maybe if you can send me a replacement or tell me where to buy the I2C version of IP5306 I can try to replace by myself

thanks for the support anyway

"-if I disconnect USB using core bottom battery the core stays on and I can do reset with power on again
-if I power off (double click) no change to power on again"

The bus scan found the IP5306 at address 0x75
I upload a simple sketch to monito battery level and it works

this is good but still don't solve my problem
-if I power m5 core with USB all ok
-if I disconnect USB using core bottom battery the core stays on and I can do reset with power on again
-if I power off (double click) no change to power on again

anything now that I can modify in IP5306 register to fix the power on ?

Davide

This schematic is wrong, every core is used i2c ip5306.

Really ? I don't know if this is a good or a very bad news...
having IP5306 with I2C and enable SW control of power management is nice but knowing that the official schematic where I have based the design of my custom HW and development of SW is not the real one really puzzle me !

this is the official schema on github
https://github.com/m5stack/M5-Schematic/blob/master/Core/Basic/M5-Core-Schematic(20171206).pdf

Is there an updated one ? are there other differences ??

I know that M5Stack is not "open source" but without a real schema quite difficult to mange any HW/FW development

Davide

https://github.com/m5stack/M5Stack/tree/master/examples/Advanced/I2C_Tester

here the schematic (or at lease what is public) of the power management...now SW no I2C

so I assume a "faulty" core (I have two in a lot of 12)

Davide

Davide

with USB Type C off course the M5 basic core boots regularly...the problem is with the battery power suppy either basic bottom or my custom expansion baord. If I shut down the M5 basic core with double clik and battery power no chance to restart

Davide

when I shut down the M5stack basic core no chance to boot again

link text

any idea so far ?

Davide