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.

This camera indeed works with the M5Stack, and is indeed very easy to hook up. This post is to document what I did.

Simply buy the cam at the link supplied and hook it up with the pin-socket-wires that come with the camera as follows:

0_1533130431253_IMG_1767.jpg

0_1533130575218_IMG_1766.jpg

Then clone https://github.com/ArduCAM/ArduCAM_ESP32S_UNO and copy the ArduCAM and ESP32WebServer libraries to your Arduino/libraries directory, add the client or AP data to the example script from the github (ArduCAM_ESP32S_UNO/libraries/ArduCAM/examples/ESP32/ArduCAM_ESP32_Capture/ArduCAM_ESP32_Capture.ino). Also make sure you uncomment #define OV2640_CAM and #define OV2640_MINI_2MP in the memorysaver.h file in the Arducam library dir, run the script and a webcam webserver works. (Surf to <ip>/stream or <ip>/capture).