@m5stack
I supplied 5v to Ⅿ5 BASIC, but it doesn't work. Why?
I connected + 5.1v to the pin socket battery and connected -t o GND.
Is it not possible to supply power from the pin socket?

Ok.Thank you.

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.