Dallas DS18B20 con ESP32 ed ESP8266: pull-up sul gate del P-MOSFET e allarmi

#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into port 2 on the Arduino, while external pullup P-MOSFET gate into port 3
#define ONE_WIRE_BUS    22
#define ONE_WIRE_PULLUP 21

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire, ONE_WIRE_PULLUP);

void setup(void)
{
  // start serial port
  Serial.begin(9600);
  Serial.println("Dallas Temperature IC Control Library Demo");

  // Start up the library
  sensors.begin();
}

void loop(void)
{ 
  // call sensors.requestTemperatures() to issue a global temperature 
  // request to all devices on the bus
  Serial.print("Requesting temperatures...");
  sensors.requestTemperatures(); // Send the command to get temperatures
  Serial.println("DONE");
  
 for(int i=0;i<sensors.getDeviceCount();i++) {
   Serial.println("Temperature for Device "+String(i)+" is: " + String(sensors.getTempCByIndex(i)));
 } 
}

/**
 * From the original example of the library.
 *
 * Here a manual management of alarm without an handler.
 *
 * by Renzo Mischianti <www.mischianti.org>
 *
 * https://mischianti.org
 */

#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into port 22
#define ONE_WIRE_BUS 22

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// arrays to hold device addresses
DeviceAddress insideThermometer;

void setup(void)
{
  // start serial port
  Serial.begin(115200);
  Serial.println("Dallas Temperature IC Control Library Demo");

  // Start up the library
  sensors.begin();

  // locate devices on the bus
  Serial.print("Found ");
  Serial.print(sensors.getDeviceCount(), DEC);
  Serial.println(" devices.");

  // search for devices on the bus and assign based on an index.
  if (!sensors.getAddress(insideThermometer, 0)) Serial.println("Unable to find address for Device 0");

  // show the addresses we found on the bus
  Serial.print("Device 0 Address: ");
  printAddress(insideThermometer);
  Serial.println();

  Serial.print("Device 0 Alarms: ");
  printAlarms(insideThermometer);
  Serial.println();

  Serial.println("Setting alarm temps...");

  // alarm when temp is higher than 22C
  sensors.setHighAlarmTemp(insideThermometer, 22);

  // alarm when temp is lower than 20C
  sensors.setLowAlarmTemp(insideThermometer, 20);

  Serial.print("New Device 0 Alarms: ");
  printAlarms(insideThermometer);
  Serial.println();

}

// function to print a device address
void printAddress(DeviceAddress deviceAddress)
{
  for (uint8_t i = 0; i < 8; i++)
  {
    if (deviceAddress[i] < 16) Serial.print("0");
    Serial.print(deviceAddress[i], HEX);
  }
}

// function to print the temperature for a device
void printTemperature(DeviceAddress deviceAddress)
{
  float tempC = sensors.getTempC(deviceAddress);
  Serial.print("Temp C: ");
  Serial.print(tempC);
  Serial.print(" Temp F: ");
  Serial.print(DallasTemperature::toFahrenheit(tempC));
}

void printAlarms(uint8_t deviceAddress[])
{
  char temp;
  temp = sensors.getHighAlarmTemp(deviceAddress);
  Serial.print("High Alarm: ");
  Serial.print(temp, DEC);
  Serial.print("C/");
  Serial.print(DallasTemperature::toFahrenheit(temp));
  Serial.print("F | Low Alarm: ");
  temp = sensors.getLowAlarmTemp(deviceAddress);
  Serial.print(temp, DEC);
  Serial.print("C/");
  Serial.print(DallasTemperature::toFahrenheit(temp));
  Serial.print("F");
}

// main function to print information about a device
void printData(DeviceAddress deviceAddress)
{
  Serial.print("Device Address: ");
  printAddress(deviceAddress);
  Serial.print(" ");
  printTemperature(deviceAddress);
  Serial.println();
}

void checkAlarm(DeviceAddress deviceAddress)
{
  if (sensors.hasAlarm(deviceAddress))
  {
    Serial.print("ALARM: ");
    printData(deviceAddress);
  }
}

void loop(void)
{
  // call sensors.requestTemperatures() to issue a global temperature
  // request to all devices on the bus
  Serial.print("Requesting temperatures...");
  sensors.requestTemperatures();
  Serial.print("DONE --> ");
  printData(insideThermometer);

  // Method 1:
  // check each address individually for an alarm condition
  checkAlarm(insideThermometer);
/*
  // Alternate method:
  // Search the bus and iterate through addresses of devices with alarms

  // space for the alarm device's address
  DeviceAddress alarmAddr;

  Serial.println("Searching for alarms...");

  // resetAlarmSearch() must be called before calling alarmSearch()
  sensors.resetAlarmSearch();

  // alarmSearch() returns 0 when there are no devices with alarms
  while (sensors.alarmSearch(alarmAddr))
  {
    Serial.print("ALARM: ");
    printData(alarmAddr);
  }
*/

  delay(2000);
}

Dallas Temperature IC Control Library Demo
Found 5 devices.
Device 0 Address: 28FF640E6C63D015
Device 0 Alarms: High Alarm: 22C/71.60F | Low Alarm: 21C/69.80F
Setting alarm temps...
New Device 0 Alarms: High Alarm: 22C/71.60F | Low Alarm: 20C/68.00F
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.12 Temp F: 70.03
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.12 Temp F: 70.03
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.19 Temp F: 70.14
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.12 Temp F: 70.03
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.12 Temp F: 70.03
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.19 Temp F: 70.14
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.12 Temp F: 70.03
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.19 Temp F: 70.14
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.19 Temp F: 70.14
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 22.37 Temp F: 72.28
ALARM: Device Address: 28FF640E6C63D015 Temp C: 22.37 Temp F: 72.28
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 22.62 Temp F: 72.72
ALARM: Device Address: 28FF640E6C63D015 Temp C: 22.62 Temp F: 72.72
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 22.37 Temp F: 72.28
ALARM: Device Address: 28FF640E6C63D015 Temp C: 22.37 Temp F: 72.28
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 22.19 Temp F: 71.94
ALARM: Device Address: 28FF640E6C63D015 Temp C: 22.19 Temp F: 71.94
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.87 Temp F: 71.37
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.75 Temp F: 71.15
Requesting temperatures...DONE --> Device Address: 28FF640E6C63D015 Temp C: 21.62 Temp F: 70.92

/**
 * Here 2 ds18b20 with the same alarm settings, and an handler for the alarm.
 *
 * When the Alarm is raised, the handler is called for every sensor in alarm state.
 *
 * by Renzo Mischianti <www.mischianti.org>
 *
 * https://mischianti.org
 *
 */

#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into port 22
#define ONE_WIRE_BUS 22

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// arrays to hold device addresses
DeviceAddress thermometer1, thermometer2;

// function that will be called when an alarm condition exists during DallasTemperatures::processAlarms();
void newAlarmHandler(const uint8_t* deviceAddress)
{
  Serial.println("Alarm Handler Start");
  printAlarmInfo(deviceAddress);
  printTemp(deviceAddress);
  Serial.println();
  Serial.println("Alarm Handler Finish");
}

void printCurrentTemp(DeviceAddress deviceAddress)
{
  printAddress(deviceAddress);
  printTemp(deviceAddress);
}

void printAddress(const DeviceAddress deviceAddress)
{
  Serial.print("Address: ");
  for (uint8_t i = 0; i < 8; i++)
  {
    if (deviceAddress[i] < 16) Serial.print("0");
    Serial.print(deviceAddress[i], HEX);
  }
  Serial.print(" ");
}

void printTemp(const DeviceAddress deviceAddress)
{
  float tempC = sensors.getTempC(deviceAddress);
  if (tempC != DEVICE_DISCONNECTED_C)
  {
    Serial.print("Current Temp C: ");
    Serial.print(tempC);
  }
  else Serial.print("DEVICE DISCONNECTED");
  Serial.print(" ");
}

void printAlarmInfo(const DeviceAddress deviceAddress)
{
  char temp;
  printAddress(deviceAddress);
  temp = sensors.getHighAlarmTemp(deviceAddress);
  Serial.print("High Alarm: ");
  Serial.print(temp, DEC);
  Serial.print("C");
  Serial.print(" Low Alarm: ");
  temp = sensors.getLowAlarmTemp(deviceAddress);
  Serial.print(temp, DEC);
  Serial.print("C");
  Serial.print(" ");
}

void setup(void)
{
  // start serial port
  Serial.begin(115200);
  Serial.println("Dallas Temperature IC Control Library Demo");

  // Start up the library
  sensors.begin();

  // locate devices on the bus
  Serial.print("Found ");
  Serial.print(sensors.getDeviceCount(), DEC);
  Serial.println(" devices.");

  // search for devices on the bus and assign based on an index
  if (!sensors.getAddress(thermometer1, 0)) Serial.println("Unable to find address for Device 0");
  // search for devices on the bus and assign based on an index
  if (!sensors.getAddress(thermometer2, 1)) Serial.println("Unable to find address for Device 1");

  Serial.print("Device thermometer1 ");
  printAlarmInfo(thermometer1);
  Serial.println();

  // set alarm ranges
  Serial.println("Setting alarm temps...");
  sensors.setHighAlarmTemp(thermometer1, 22);
  sensors.setLowAlarmTemp(thermometer1, 20);

  Serial.print("New thermometer1 ");
  printAlarmInfo(thermometer1);
  Serial.println();

  Serial.print("Device thermometer2 ");
  printAlarmInfo(thermometer2);
  Serial.println();

  // set alarm ranges
  Serial.println("Setting alarm temps...");
  sensors.setHighAlarmTemp(thermometer2, 22);
  sensors.setLowAlarmTemp(thermometer2, 20);

  Serial.print("New thermometer2 ");
  printAlarmInfo(thermometer2);
  Serial.println();

  // attach alarm handler
  sensors.setAlarmHandler(&newAlarmHandler);

}

void loop(void)
{
  // ask the devices to measure the temperature
  sensors.requestTemperatures();

  // if an alarm condition exists as a result of the most recent
  // requestTemperatures() request, it exists until the next time
  // requestTemperatures() is called AND there isn't an alarm condition
  // on the device
  if (sensors.hasAlarm())
  {
    Serial.println("Oh noes!  There is at least one alarm on the bus.");
  }

  // call alarm handler function defined by sensors.setAlarmHandler
  // for each device reporting an alarm
  sensors.processAlarms();

  if (!sensors.hasAlarm())
  {
    // just print out the current temperature
	    printCurrentTemp(thermometer1);
	    Serial.print(" - ");
	    printCurrentTemp(thermometer2);
	    Serial.println();
  }

  delay(1000);
}

  // attach alarm handler
  sensors.setAlarmHandler(&newAlarmHandler);

  // call alarm handler function defined by sensors.setAlarmHandler
  // for each device reporting an alarm
  sensors.processAlarms();

Dallas Temperature IC Control Library Demo
Found 5 devices.
Device thermometer1 Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C 
Setting alarm temps...
New thermometer1 Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C 
Device thermometer2 Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C 
Setting alarm temps...
New thermometer2 Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 20.75  - Address: 28FF640E6C6F7A89 Current Temp C: 20.69 
Address: 28FF640E6C63D015 Current Temp C: 21.06  - Address: 28FF640E6C6F7A89 Current Temp C: 21.50 
Oh noes!  There is at least one alarm on the bus.
Alarm Handler Start
Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C Current Temp C: 22.62 
Alarm Handler Finish
Oh noes!  There is at least one alarm on the bus.
Alarm Handler Start
Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C Current Temp C: 22.56 
Alarm Handler Finish
Alarm Handler Start
Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C Current Temp C: 23.44 
Alarm Handler Finish
Oh noes!  There is at least one alarm on the bus.
Alarm Handler Start
Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C Current Temp C: 23.12 
Alarm Handler Finish
Alarm Handler Start
Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C Current Temp C: 23.62 
Alarm Handler Finish
Oh noes!  There is at least one alarm on the bus.
Alarm Handler Start
Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C Current Temp C: 22.94 
Alarm Handler Finish
Alarm Handler Start
Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C Current Temp C: 23.31 
Alarm Handler Finish
Oh noes!  There is at least one alarm on the bus.
Alarm Handler Start
Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C Current Temp C: 22.75 
Alarm Handler Finish
Alarm Handler Start
Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C Current Temp C: 23.06 
Alarm Handler Finish
Oh noes!  There is at least one alarm on the bus.
Alarm Handler Start
Address: 28FF640E6C63D015 High Alarm: 22C Low Alarm: 20C Current Temp C: 22.56 
Alarm Handler Finish
Alarm Handler Start
Address: 28FF640E6C6F7A89 High Alarm: 22C Low Alarm: 20C Current Temp C: 22.81 
Alarm Handler Finish