I bought m5stack basic and core2.
These must be powered by AA batteries.

If I connect 4 batteries, the voltage will be 6V.
Is it high as a power source for m5stack?

Will m5stack supplied with 6v break?

Thank you.

Hello.　I got Basic and Core2. I want to make a door sensor by connecting ”M5stack”, ”COM.sigfox” and a ”magnet sensor”.　 Does anyone know of a helpful sketch or program?

@zontex Thank you.
DHT, DS18B20 and Soil Moisture Sensor are not M5 products. Use Arduino.
Thank you.

Hello.
I want to connect the sensors DHT22 and DS18B20 and the capacitive soil moisture sensor to Core 2 for operation.
Below is the sketch.　However, when I wrote the sketch with the pin stuck, fatal error occurred.And after that, I couldn't write.

Core 2 has been lucky enough to come back, but it's scary.Therefore, I would like to know the GPIO that should point to the sensor. Please let me know.
Thank you.

//#include <M5Stack.h>
#include <M5Core2.h>

#include "DHT.h"  
//#define DHTPIN 13  // Basic.DHT22.
#define DHTPIN 27  // Core2.DHT22 .19.27
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

#include <OneWire.h>  //DS18B20
#include <DallasTemperature.h>  //DS18B20
//#define ONE_WIRE_BUS 0 // Basic.DS18B20. 
#define ONE_WIRE_BUS 26 // Core2.DS18B20.25.26.27
OneWire oneWire(ONE_WIRE_BUS); //　OneWire
DallasTemperature sensors(&oneWire);//  Dallas Temperature sensor

#define PinSoilMoist 35  //CapSoilMoistSensor
  const int dry = 3700;   
  const int wet = 1400; 

int inttemp , inthumid ;  
int intsoilmoist , soilval , intsoiltemp;  
float temperature, humidity, soilMoist, soilTemp;  

void getData() {
delay(2000);
dht.begin();
float temperature = dht.readTemperature();
float humidity = dht.readHumidity();
if (isnan(temperature) || isnan(humidity) ) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
}
  inttemp = int ( temperature ); 
  inthumid = int ( humidity );
  Serial.print( inttemp ); Serial.println(" *C, ");  
  Serial.print( inthumid ); Serial.println(" RH% ");

  soilMoist = analogRead(PinSoilMoist);  
  soilval = map(soilMoist, dry, wet, 0, 100); 
  if(soilval >= 99)
{
  intsoilmoist = 99;
}
else if(soilval <=20)
{
  intsoilmoist = 20;
}
else if(soilval >21 && intsoilmoist < 99)
{
  intsoilmoist = soilval ;  
}
//  Serial.print( soilMoist ); Serial.println(" Pin ");  
  Serial.print( intsoilmoist ); Serial.println(" soil% ");  
  delay(250);

  sensors.requestTemperatures();  
  float soilTemp = sensors.getTempCByIndex(0);
  intsoiltemp = int ( soilTemp );  
  Serial.print( intsoiltemp ); Serial.println(" soil*C, ");  
}

void sendSigfox() {
  String msg = String (inttemp, HEX)    
               + String (inthumid, HEX)
               + String (intsoilmoist, HEX)
               + String (intsoiltemp, HEX);

   Serial2.println("AT$SF=" + msg);
  Serial.println("AT$SF=" + msg);
}

void setup() {
  M5.begin(true, false, true);  
//  M5.Speaker.write(0); 
//  M5.Axp.SetSpkEnable(0);  

//  Serial2.begin(9600, SERIAL_8N1, 16, 17);  
  Serial2.begin(9600, SERIAL_8N1, 13, 14);  
//  Serial.begin(9600);  
}

void loop() {
  getData();
  sendSigfox();  

//  M5.Power.deepSleep(SLEEP_SEC(60*15)); 
  M5.Axp.DeepSleep(SLEEP_SEC(60*0.5)); 
}

@felmue
While I was writing to Core 2, I pressed the power button for a long time and the writing was successful.

Thank you.

Thank you @felmue .I have tried your suggestion.

Have you tried a different USB cable? :Yes I did.
Have you tried a different USB port? :Yes I did.
Have you tried closing and reopening your software? :Yes I did.
Have you tried to reboot your computer? :Yes I did.

However, I got an error. Isn't my Core 2 broken ?

I tried another sketch and the result was the same.
At that time, I connected the actual sensor.
DHT22 to GPIO72.
DS18B20 to GPIO26.
Analog sensor to GPIO36.
Is that not good?
Thank you.

@felmue Thank you.
I tried your sample. I succeeded in compiling.
But I can't write to core2 since yesterday.

Displayed "A fatal error occurred: Failed to connect to ESP32: Timed out Waiting for packet header"

Both of the Core2 I have are like that. Did my Core 2 break?
I just wrote a sketch.

Thank you.

@felmue
Thank you for suggestion Felix.　And Sorry for my late reply.
I tried Serial2.println("AT$SF=" + msg );.
or Serial2.println("AT$SF= + msg ");.

and Serial2.write("AT$SF= + msg ");.
or Serial2.write("AT$SF=" + msg );.

But I couldn't communicate.
If you have new tips, I would love to try.

Thank you.

Hello. I bought M5stack Core2 and COM.Sigfox. I want to use this for data communication.
I was able to register the module in the sigfox backend. But I can't communicate or call back.
When I use M5stack Basic and COM.Sigfox,I can do data communication and callbacks.
Is there something wrong with my sketch?

#include <M5Core2.h>

void setup() {
 M5.begin(true, false, true);
 Serial2.begin(9600, SERIAL_8N1, 13, 14);
 Serial.begin(9600);
 }

void loop() {
 int val = 11223344;
 String msg = String(val, HEX);
 Serial.print( msg);  Serial.println(" msg ");
 Serial2.print("AT$SF=" + msg);
 Serial.print("AT$SF=" + msg);  Serial.println(" AT$SF= msg ");
 delay(15*1000);
}

Hello.
I purchased M5stack Basic and Core2.
I want to connect COM.X Sigfox to this and communicate with sigfox.
So I installed the Arduino IDE, USB serial driver, board definitions and libraries on my PC. And
I tried to write a sample sketch to get ID / PAC information to M5stack.

M5stack Basic was successful.

The following error message was displayed on M5stack Cors2.

File "esptool.py", line 3682, in <module>

Serial port COM3

File "esptool.py", line 3675, in _main

File "esptool.py", line 3329, in main

File "esptool.py", line 263, in init

File "site-packages \ serial \ __ init__.py", line 88, in serial_for_url

File "site-packages \ serial \ serialwin32.py", line 62, in open

serial.serialutil.SerialException: could not open port'COM3': WindowsError (2,'\ x8ew \ x92 \ xe8 \ x82 \ xb3 \ x82 \ xea \ x82 \ xbd \ x83t \ x83 @ \ x83C \ x83 \ x8b \ x82 \ xaa \ x8c \ xa9 \ x82 \ xc2 \ x82 \ xa9 \ x82 \ xe8 \ x82 \ xdc \ x82 \ xb9 \ x82 \ xf1 \ x81B')

Failed to execute script esptool

When Basic is connected to the PC, it is connected to com3 in Device Manager, but when Core2 is connected, it is com7. Something is wrong.

What should I do? please tell me. Thank you.