it also depends on the clock speed. sometimes speed is not needed. and it can save 50% of the power consumption on max CPU load
https://www.savjee.be/2019/12/esp32-tips-to-increase-battery-life/

I published this video a short while ago https://www.youtube.com/watch?v=V8rmir-Tmy8 you can try the libraries I used. I reckon I got around 10cm range from the sticks but much less from the atoms, you can see in the videos, what range I am successful at.

ok...i find out that i have to use SoftwareI2c and the i2c device must have pullup resistors:

#include "SoftwareI2C.h"

SoftwareI2C softwarei2c;

void setup() {
Serial.begin(115200);
softwarei2c.begin(26, 32); // sda, scl
Serial.println("begin to scan...");
}

void loop() {
for (unsigned char i = 1; i <= 127; i++) {
if (softwarei2c.beginTransmission(i)) {
Serial.print("0x");
Serial.println(i, HEX);

while (1); } softwarei2c.endTransmission(); } Serial.println("find nothing"); while (1);

}

tnks a lot!!!

I had to use a windows machine with M5Burner because as much as I tried the Mac version would no work as expected. However I got it flashed back to UIFlow 1.4.5 and got it working now

ATOM not build-in power management chip. the schematic is not provided yet

now it works:

/* http://www.dauxi.com/KS10X-V110_EN.pdf 11101000 https://www.arduino.cc/en/Tutorial/SFRRangerReader */ #include <M5Stack.h> #include <Wire.h> #define KS103ADD 0x74 // questo è quello che da lo scanner IIC //#define KS103ADD 0xE8 // questo è quello che da all'inizio il led verde 11101000 back green led Short flash twice will be “1”, slow flash once will be “0” word dist = 0; void setup() { Wire.begin(); // Wire.begin(22, 21);//M5STACK: 22/SCL/GIALLO ,21/SDA/BIANCO Serial.begin(115200); //inizio comando Wire.beginTransmission(KS103ADD); Wire.write(byte(0x02)); Wire.write(0x72); // Invia istruzioni per la riduzione del rumore Wire.endTransmission(); // fine comando delay(2000); } void loop() { // if (Serial.read() == 's') { // while (Serial.read() != 'o') { KS103_read(); Serial.print(dist/10); Serial.print(" cm"); Serial.println(); delay(250); //} //} // delay(1000); } void KS103_read() { // step 1: instruct sensor to read echoes Wire.beginTransmission(KS103ADD); // transmit to device // the address specified in the datasheet is (0xE8) // but i2c adressing uses the high 7 bits so it's (0x74) Wire.write(byte(0x02)); // sets register pointer to echo #1 register (0x02) Wire.write(0xbc); //Range is set to 10m with temperature compensation Wire.endTransmission(); // step 2: wait for readings to happen // delay(1); delay(70); // datasheet suggests at least 65 milliseconds // step 3: instruct sensor to return a particular echo reading Wire.beginTransmission(KS103ADD); // transmit to device Wire.write(byte(0x02)); // sets register pointer to echo #1 register (0x02) Wire.endTransmission(); // stop transmitting // step 4: request reading from sensor Wire.requestFrom(KS103ADD, 2); // request 2 bytes from slave device // step 5: receive reading from sensor if (2 <= Wire.available()) // if two bytes were received { dist = Wire.read(); // receive high byte (overwrites previous reading) dist = dist << 8; // shift high byte to be high 8 bits dist |= Wire.read(); // receive low byte as lower 8 bits } }

OK, thanks, I'll have a look.

I don't know how to edit the title to put [SOLVED] into it.

Hello,
please, could you help me? What is M5.powerOFF() doing inside? I am using the esp-idf for my projects with M5Stack and I want Power off from software, but I can only deinitialize all of my routines and turn off display. And when I want to powr on again after power button, then the device turn off first.

Thank you.
Vilem

@option pls check the lib version is latest. and confirm the board select m5stack -core

RTC works but not ntp_syc- that is a pity

hi , did your has upgrade your library version to latest. (m5stack lib version >= 0.2.8)

@ckuehnel said in M5stack basic core battery power on issue (ip5306 strange power management):

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

Done http://forum.m5stack.com/category/33/m5stick-v

Hi @heybin !
What do you want to show us with the picture: flickering due to problems with contacts?

Do you know what the meaning is of:

flashing? ( = 1s on > 1s off > 1s on > and so on: charging?) continiously OFF? continiously ON?

What I noticed so far:

a) USB charging cable connected to M5GO CHG Base and M5GO CHG Base attached to M5GO Base: LED is flashing and obviously charging
b) M5GO disconnected from M5GO Base: LED = ON for 30 seconds , than OFF, but FIRE is still on and operational (Power from internal Lipo Battery?)
c) M5GO CHG Base attached to M5GO Base, but no power on USB-Cable: same behaviour as item b) above. (Power from internal Lipo battery AND/OR CHG Base Battery?)

For a) and b) so far, I didn't test, for how long the FIRE stays ON.