Hey Lukas,

This won't work. The mpu9250 module expects to find an MPU6500 accelerometer so even instantiating an mpu9250 object will fail during init(). Even if I remove the part of the code that checks for the MPU6500, instantiation will still fail when it attempts to initialize the magnetometer by writing to one of it's registers.

Hello again,
i've made a sketch on arduino ide to control a nema 17 stepper motor with the shield L298N

here is the sketch :
/*
Controle de moteur pas à pas avec un L298N
Le moteur est connecté sur les broches 2,3,4 et 5 de l'Arduino
Le fil de masse (GND) est commun aux 2 platines.
*/

#include <Stepper.h>

const int NbPasParTour = 200; // Nombre de pas pour 360 degres
Stepper Moteur1(NbPasParTour, 2, 3, 4, 5); // Initialise le moteur sur les broches 2 à 5

void setup()
{
Moteur1.setSpeed(60); //Vitesse de rotation du moteur
Serial.begin(9600); //Initialise le moniteur série
}

void loop()
{
Serial.println("Sens horaire"); //On fait 1 tour en sens horaire
Moteur1.step(NbPasParTour);
delay(1000); //Pause 1 seconde

Serial.println("Sens anti-horaire"); //On fait 1 tour en sens anti-horaire
Moteur1.step(-NbPasParTour);
delay(1000); //Pause 1 seconde
}

It's work fine !

But when i try on the m5, on the PIN 3, 1, 16, 17 with this sketch, the motor only vibrate :
/*
Controle de moteur pas à pas avec un L298N
Le moteur est connecté sur les broches 3, 1, 16, 17 du m5
Le fil de masse (GND) est commun aux 2 platines.
*/
#include <M5Stack.h>
#include <Stepper.h>

const int NbPasParTour = 200; // Nombre de pas pour 360 degres

Stepper Moteur1(NbPasParTour, 3, 1, 16, 17); // Initialise le moteur sur les broches

void setup()
{
Moteur1.setSpeed(100); //Vitesse de rotation du moteur
m5.begin();
M5.Lcd.setBrightness(200);

M5.Lcd.setTextColor(0xffff);
M5.Lcd.setTextSize(3);
M5.Lcd.setCursor(50, 20);
M5.Lcd.print("M5 Seeder");
}

void loop()
{
M5.Lcd.setTextColor(0x7bef);
M5.Lcd.setTextSize(2);
M5.Lcd.setCursor(55, 60);
M5.Lcd.print("Sens horaire");
Moteur1.step(NbPasParTour*2);
delay(1000); //Pause 1 seconde

M5.Lcd.setTextColor(0x7bef);
M5.Lcd.setTextSize(2);
M5.Lcd.setCursor(55, 60);
M5.Lcd.print("Sens anti-horaire");
Moteur1.step(-NbPasParTour);
delay(1000); //Pause 1 seconde

m5.update();
}

Any idea ?
thank you

Try using this code from this link to add to your M5stack Digital Clock example.

https://github.com/adafruit/RTClib/blob/master/examples/ds3231/ds3231.ino

you need to install the RTClib master library to make it work.

@millerman

I would recommend using Blynk. It has email and push notifications built into their platform and should be pretty easy to do using the Arduino IDE.

https://www.blynk.cc

Ok, it seems that the problem was due to my version of ESP32 tools.
I updated my ESP32 framework and now the code is working fine.

Also, I used PlatformIO in VSCode which make things simpler since it enables the M5STACK_FIRE flag during compilation.

@nnn 在 Serial2 Don't compile 中说：

HardwareSerial Serial2_(2)

Thanks

That worked for me

David Ardis

Thanks for the tip. Will do!

Hi
I'm having the same problem with the M5Stack/Advanced/Display/TFT_Screen_Capture example just get white screen captures (0xFFFF for any pixel )
Keith

@julian Exactly what I need, many thanks

Thanks a lot Osmar.

IP5108 I2C description:

7-bit slave address IP5108 is 0x75 (byte with write bit = 0xEA; byte with read bit = 0xEB)
400 Kbps speed of I2C supported
1 byte data = 8-bit data (bits from 7 to 0)

WRITE Arduino example:
Wire.beginTransmission(0x75);
Wire.write(register_address_byte);
Wire.write(data_byte);
Wire.endTransmission();

READ Arduino example:
Wire.beginTransmission(0x75);
Wire.write(register_address_byte);
Wire.endTransmission();
Wire.requestFrom(0x75,1);
data_byte = Wire.read();

REGISTERS:

1. Enable / disable functions:
SYS_CTL0 = 0x01:

bit 4 (read/write): 0 = disbale / 1 = enable (1 = after reset) detection ??? (I do not understand.) bit 3 (read/write): 0 = disbale / 1 = enable (1 = after reset) light bit 2 (read/write): 0 = disbale / 1 = enable (1 = after reset) booster bit 1 (read/write): 0 = disable / 1 = enable (1 = after reset) charger

SYS_CTL1 = 0x02:

bit 1 (read/write): 0 = disable / 1 = enable (1 = after reset) auto-standby bit 0 (read/write): 0 = disable / 1 = enable (1 = after reset) auto ??? (I do not understand.)

SYS_CTL3 = 0x03:

bit 5 (read/write): 0 = disable / 1 = enable (1 = after reset) off by button

2. General setup features:
SYS_CTL2 = 0x0C:

bits 7-3 (read/write): (01010 = after reset) auto-standby current limit as multiple 12 mA

SYS_CTL4 = 0x04:

bits 7-6 (read/write): (10 = after reset) time for auto-standby: 00=8s, 01=16s, 10=32s, 11=64s

SYS_CTL3 = 0x03:

bits 7-6 (read/write): (01 = after reset) time for recognition button press: 00=1s, 01=2s, 10=3s, 11=4s

SYS_CTL5 = 0x07:

bit 1 (read/write): (0 = after reset) control of light by button: 0=press, 1=double click bit 0 (read/write): (0 = after reset) off by button: 0=double click, 1=press

3. Charging setup features:
CHARGER_CTL1 = 0x22:

bits 3-2 (read/write): (01 = after reset) VOUT undervoltage limit during chargig: 00=4.53V, 01=4.63V, 10=4.73V, 11=4.83V

CHARGER_CTL2 = 0x24:

bits 6-5 (read/write): (00 = after reset) battery type = charging voltage: 00=4.2V, 01=4.3V, 10=4.35V bits 2-1 (read/write): (10 = after reset) overcharging of charging: 00=0mV, 01=14mV, 10=28mV, 11=42mV

CHG_DIG_CTL4 = 0x25:

bits 4-0 (read/write): (10110 = after reset) charging current setting [A]:
b0 x 0.1 + b1 x 0.2 + b2 x 0.4 + b3 x 0.6 + b4 x 1.4

4. Charging information:
Reg_READ0a = 0x70:

bit 3 (read only): charging status: 0 = not charging, 1 = charging

Ref_READ0b = 0x71:

bits 7-5 (read only): detailed charging status:
000 = inactivity
001 = charging
010 = constant current charging
011 = charging with constant voltage
100 = ??? (missing description in original document)
101 = end of charging (maintenance current) bit 3 (read only): signal of end of charging (=1)

5. PIN assignment & control:
MFP_CTL0 = 0x51:

bits 5-4 (read/write): (00 = after reset) pin LIGHT assignement: 00=WLED, 01=GPIO2, 10=VREF bits 3-2 (read/write): (00 = after reset) pin L4 assignement: 00=L4, 01=GPIO1 bits 1-0 (read/write): (00 = after reset) pin L3 assignement: 00=L3, 01=GPIO0

GPIO_CTL2a = 0x53:

bits 2-0 (read/write): (000 = after reset) GPIO[2:0] input enable

GPIO_CTL2b = 0x54:

bits 2-0 (read/write): (000 = after reset) GPIO[2:0] output enable

GPIO_CTL3 = 0x55:

bits 2-0 (read/write): (000 = after reset) GPIO[2:0] data

6. Measurement:
BATVADC_DAT0 = 0xA2:

pins 7-0 (read only): LOW 8 bits (byte) of BATVADC

BATVADC_DAT1 = 0xA3:

pins 5-0 (read only): HIGH 6 bits of BATVADC

Calculation according to the original document:

BATIADC_DAT0 = 0xA4:

pins 7-0 (read only): LOW 8 bits (byte) of BATIADC

BATIADC_DAT1 = 0xA5:

pins 5-0 (read only): HIGH 6 bits of BATIADC

Calculation according to the original document:

BATOCV_DAT0 = 0xA8:

pins 7-0 (read only): LOW 8 bits (byte) of BATOCV

BATOCV_DAT1 = 0xA9:

pins 5-0 (read only): HIGH 6 bits of BATOCV

Calculation according to the original document:

This is true: BATOCV = BATVACD + BATIADC * battery_internal_resistnace

7. WLED status:
Reg_READ1 = 0x72:

bit 7 (read only): 0 = WLED is off, 1 = WLED is on

8. Light / heavy load:
Reg_READ1 = 0x72:

bit 6 (read only): 0 = heavy load over 75 mA, 1 = light load less 75 mA

9. Button control:
Reg_READ2 = 0x77:

bit 3 (read; write 1 = reset) flag button double clicked (=1) bit 1 (read; write 1 = reset) flag button pressed (=1) bit 0 (read; write 1 = reset) flag button clicked (=1)

That is all.

@suremicro 在 Custom Prototype Board 中说：

Yes, if you head over to https://easyeda.com/zazarltd the design is there which you can use to get your own boards made. I used JLCPCB.

Haven't used JLCPCB, I've used Seeedstudio Fusion service https://www.seeedstudio.com/fusion_pcb.html a few times. They are especially good if you need several of the same board as they send 10 copies