esp8266 und DS18B20

[sams2019]

Hallo zusammen
Habe den mehre DS18BS20 an den ESP8266 angeschlossen und das Programm unten laufen.
Mein Probelm ist jetzt: Es werden nicht alle DS18B20 erkannt.
Frage: kann ich den Wiederstand jetzt 4.7 KOhme veränderen. In welchen bereich?
Und erreiche ich damit was?


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

// Data wire is plugged TO GPIO 4
#define ONE_WIRE_BUS 4

// 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);

// Number of temperature devices found
int numberOfDevices;

// We'll use this variable to store a found device address
DeviceAddress tempDeviceAddress;

void setup() {
// start serial port
Serial.begin(115200);
Serial.println();

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

// Grab a count of devices on the wire
numberOfDevices = sensors.getDeviceCount(), DEC;

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

// Loop through each device, print out address
for (int i = 0; i < numberOfDevices; i++) {
// Search the wire for address
if (sensors.getAddress(tempDeviceAddress, i)) {
Serial.print("Found device ");
Serial.print(i, DEC);
Serial.print(" with address: ");
printAddress(tempDeviceAddress);
Serial.println();
} else {
Serial.print("Found ghost device at ");
Serial.print(i, DEC);
Serial.print(" but could not detect address. Check power and cabling");
}
}
}

void loop() {
sensors.requestTemperatures(); // Send the command to get temperatures

// Loop through each device, print out temperature data
for (int i = 0; i < numberOfDevices; i++) {
// Search the wire for address
if (sensors.getAddress(tempDeviceAddress, i)) {
// Output the device ID
Serial.print("Temperature for device: ");
Serial.println(i, DEC);
// Print the data
float tempC = sensors.getTempC(tempDeviceAddress);
Serial.print("Temp C: ");
Serial.print(tempC);
Serial.print(" Temp F: ");
Serial.println(DallasTemperature::toFahrenheit(tem pC)); // Converts tempC to Fahrenheit
}
}
delay(5000);
}

// 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);
}
}