![\"ESP8266](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/ESP8266-DS18B20-Temperature-Sensor-Arduino-IDE-Web-Server.jpg?resize=1200%2C675&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nThroughout this tutorial we\u2019ll cover the following topics:<\/p>\n\n\n\n
- \n
- Read temperature from one DS18B20 temperature sensor;<\/li>\n\n\n\n
- Read temperature from multiple DS18B20 temperature sensors;<\/li>\n\n\n\n
- Display DS18B20 sensor readings on a web server.<\/li>\n<\/ol>\n\n\n\n
You might also like reading other DS18B20 guides:<\/p>\n\n\n\n
- \n
- ESP32 DS18B20 Temperature Sensor with Arduino IDE<\/a><\/li>\n\n\n\n
- ESP32\/ESP8266 DS18B20 Temperature Sensor with MicroPython<\/a><\/li>\n\n\n\n
- ESP32 with Multiple DS18B20 Temperature Sensors<\/a><\/li>\n\n\n\n
- DS18B20 Temperature Sensor with Arduino<\/a><\/li>\n<\/ul>\n\n\n\n
Learn more about the ESP8266 with our course: Home Automation using ESP8266<\/a>. <\/p>\n\n\n\n
Introducing DS18B20 Temperature Sensor<\/h2>\n\n\n\n
The DS18B20 temperature sensor<\/a> is a one-wire digital temperature sensor. This means that it just requires one data line (and GND) to communicate with your ESP8266.<\/p>\n\n\n\n
It can be powered by an external power supply or it can derive power from the data line (called \u201cparasite mode\u201d), which eliminates the need for an external power supply.<\/p>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/DS18B20-tempeature-sensor-pinout.jpg?resize=750%2C490&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nEach DS18B20 temperature sensor has a unique 64-bit serial code. This allows you to wire multiple sensors to the same data wire. So, you can get temperature from multiple sensors using just one GPIO.<\/p>\n\n\n\n
The DS18B20 temperature sensor is also available in waterproof version<\/a>.<\/p>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/ds18b20-waterproof.jpg?resize=750%2C421&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nHere\u2019s a summary of the most relevant specs of the DS18B20 temperature sensor:<\/p>\n\n\n\n
- \n
- Communicates over one-wire bus<\/li>\n\n\n\n
- Power supply range: 3.0V to 5.5V<\/li>\n\n\n\n
- Operating temperature range: -55\u00baC to +125\u00baC<\/li>\n\n\n\n
- Accuracy +\/-0.5 \u00baC (between the range -10\u00baC to 85\u00baC)<\/li>\n<\/ul>\n\n\n\n
For more information consult the DS18B20 datasheet<\/a>.<\/p>\n\n\n\n
Parts Required<\/h2>\n\n\n\n
To complete this tutorial you need the following components:<\/p>\n\n\n\n
- \n
- ESP8266<\/a> – read Best ESP8266 Wi-Fi Development Boards<\/a><\/li>\n\n\n\n
- DS18B20 temperature sensor <\/a>(one or multiple sensors) \u2013 waterproof version<\/a><\/li>\n\n\n\n
- 4.7k Ohm Resistor<\/a><\/li>\n\n\n\n
- Breadboard<\/a><\/li>\n\n\n\n
- Jumper wires<\/a><\/li>\n<\/ul>\n\n\n
You can use the preceding links or go directly to MakerAdvisor.com\/tools<\/a> to find all the parts for your projects at the best price!<\/p>
![](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/header-200.png?w=1200&quality=100&strip=all&ssl=1\")
<\/a><\/p>\n\n\n\nESP8266 with DS18B20 Schematic Diagram<\/h2>\n\n\n\n
As mentioned previously, the DS18B20 temperature sensor can be powered through the VDD pin (normal mode<\/strong>), or it can derive its power from the data line (parasite mode<\/strong>). You can choose either modes.<\/p>\n\n\n\n
Parasite Mode<\/h3>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/ds18b20_esp8266_single_parasite.png?resize=558%2C763&quality=100&strip=all&ssl=1\")
<\/a><\/figure><\/div>\n\n\nNormal Mode<\/h3>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/ds18b20_esp8266_single_normal_F.png?resize=559%2C763&quality=100&strip=all&ssl=1\")
<\/a><\/figure><\/div>\n\n\nNote: <\/strong>in this tutorial we\u2019re connecting the DS18B20 data line to GPIO 4<\/span>, but you can use any other suitable GPIO.<\/p>\n\n\n\n
Read our ESP8266 GPIO Reference Guide<\/a> to learn more about the ESP8266 GPIOs.<\/p>\n\n\n\n
Note: <\/strong> if you\u2019re using an ESP-01<\/a>, GPIO 2 is the most suitable pin to connect to the DS18B20 data pin.<\/p>\n\n\n\n
Preparing Your Arduino IDE<\/h2>\n\n\n\n
We\u2019ll program the ESP8266 using Arduino IDE, so make sure you have the ESP8266 add-on installed before proceeding:<\/p>\n\n\n\n
- \n
- Install ESP8266 Board in Arduino IDE (Windows, Mac OS X, and Linux instructions)<\/a><\/li>\n<\/ul>\n\n\n\n
Installing Libraries for DS18B20<\/h3>\n\n\n\n
To interface with the DS18B20 temperature sensor, you need to install the One Wire library by Paul Stoffregen<\/a> and the Dallas Temperature library<\/a>. Follow the next steps to install those libraries.<\/p>\n\n\n\n
1. Open your Arduino IDE and go to Sketch <\/strong>> Include Library<\/strong> > Manage Libraries<\/strong>. The Library Manager should open.<\/p>\n\n\n\n
2. Type \u201conewire<\/strong>\u201d in the search box and install the OneWire library by Paul Stoffregen.<\/p>\n\n\n
\n![\"Install](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/install-onewire-library.png?resize=786%2C443&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n3. Then, search for “Dallas<\/strong>” and install the Dallas Temperature library by Miles Burton.<\/p>\n\n\n
\n![\"Install](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/06\/install-dallas-temperature.png?resize=787%2C443&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nAfter installing the libraries, restart your Arduino IDE.<\/p>\n\n\n\n
\n\n\n\nCode (Single DS18B20)<\/h2>\n\n\n\n
After installing the required libraries, you can upload the following code to the ESP8266. The code reads temperature from the DS18B20 temperature sensor and displays the readings on the Arduino IDE Serial Monitor. <\/p>\n\n\n
\/*********\n Rui Santos\n Complete project details at https:\/\/RandomNerdTutorials.com \n*********\/\n\n#include <OneWire.h>\n#include <DallasTemperature.h>\n\n\/\/ GPIO where the DS18B20 is connected to\nconst int oneWireBus = 4; \n\n\/\/ Setup a oneWire instance to communicate with any OneWire devices\nOneWire oneWire(oneWireBus);\n\n\/\/ Pass our oneWire reference to Dallas Temperature sensor \nDallasTemperature sensors(&oneWire);\n\nvoid setup() {\n \/\/ Start the Serial Monitor\n Serial.begin(115200);\n \/\/ Start the DS18B20 sensor\n sensors.begin();\n}\n\nvoid loop() {\n sensors.requestTemperatures(); \n float temperatureC = sensors.getTempCByIndex(0);\n float temperatureF = sensors.getTempFByIndex(0);\n Serial.print(temperatureC);\n Serial.println("\u00baC");\n Serial.print(temperatureF);\n Serial.println("\u00baF");\n delay(5000);\n}\n<\/code><\/pre>\n\tView raw code<\/a><\/p>\n\n\n\n
There are many different ways to get the temperature from DS18B20 temperature sensors. However, if you’re using just one single sensor, this is one of the easiest and simplest ways. <\/p>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/ESP8266-single-ds18b20.jpg?resize=750%2C421&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nHow the Code Works<\/h2>\n\n\n\n
Start by including the OneWire<\/span> and the DallasTemperature<\/span> libraries.<\/p>\n\n\n\n
#include <OneWire.h>\n#include <DallasTemperature.h><\/code><\/pre>\n\n\n\nCreate the instances needed for the temperature sensor. The temperature sensor is connected to GPIO 4<\/span>. <\/p>\n\n\n\n
\/\/ GPIO where the DS18B20 is connected to\nconst int oneWireBus = 4;\n\/\/ Setup a oneWire instance to communicate with any OneWire devices\nOneWire oneWire(oneWireBus);\n\/\/ Pass our oneWire reference to Dallas Temperature sensor \nDallasTemperature sensors(&oneWire);<\/code><\/pre>\n\n\n\nIn the setup()<\/span>, initialize the Serial Monitor at a baud rate of 115200.<\/p>\n\n\n\n
Serial.begin(115200);<\/code><\/pre>\n\n\n\nInitialize the DS18B20 temperature sensor:<\/p>\n\n\n\n
sensors.begin();<\/code><\/pre>\n\n\n\nBefore actually getting the temperature, you need to call the requestTemperatures()<\/span> method.<\/p>\n\n\n\n
sensors.requestTemperatures(); <\/code><\/pre>\n\n\n\nThen, get the temperature in Celsius by using the getTempCByIndex()<\/span> method as shown below:<\/p>\n\n\n\n
float temperatureC = sensors.getTempCByIndex(0);<\/code><\/pre>\n\n\n\nOr use the getTempFByIndex()<\/span> to get the temperature in Fahrenheit.<\/p>\n\n\n\n
float temperatureF = sensors.getTempFByIndex(0);<\/code><\/pre>\n\n\n\nThe getTempCByIndex()<\/span> and the getTempFByIndex()<\/span> methods accept the index of the temperature sensor. Because we’re using just one sensor its index is 0. If you want to read more than one sensor, you use index 0 for one sensor, index 1 for other sensor and so on.<\/p>\n\n\n\n
Finally, print the results in the Serial Monitor.<\/p>\n\n\n\n
Serial.print(temperatureC);\nSerial.println(\"\u00baC\");\nSerial.print(temperatureF);\nSerial.println(\"\u00baF\");<\/code><\/pre>\n\n\n\nNew temperature readings are requested every 5 seconds.<\/p>\n\n\n\n
delay(5000);<\/code><\/pre>\n\n\n\nDemonstration<\/h2>\n\n\n\n
After uploading the code, open the Arduino IDE Serial Monitor at a 115200 baud rate. You should get the temperature displayed in both Celsius and Fahrenheit: <\/p>\n\n\n
\n![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/DS18B20-ESP8266-Basic-Temperature-Example.png?resize=665%2C525&quality=100&strip=all&ssl=1\")
<\/a><\/figure><\/div>\n\n\n
\n\n\n\nGetting Temperature from Multiple DS18B20 Temperature Sensors<\/h2>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/ESP8266-ds18b20-multiple-sensors-1.jpg?resize=750%2C421&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nThe DS18B20 temperature sensor communicates using one-wire protocol and each sensor has a unique 64-bit serial code, so you can read the temperature from multiple sensors using just one single digital Pin.<\/p>\n\n\n\n
Schematic<\/h3>\n\n\n\n
To read the temperature from multiple sensors, you just need to wire all data lines together as shown in the next schematic diagram:<\/p>\n\n\n
\n![\"DS18B20](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/ds18b20_esp8266_multiple_bb.png?resize=1020%2C806&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nCode (Multiple DS18B20s)<\/h3>\n\n\n\n
Then, upload the following code. It scans for all devices on GPIO 4<\/span> and prints the temperature for each one. This sketch is based on the example provided by the DallasTemperature library.<\/p>\n\n\n
\/*********\n Rui Santos\n Complete project details at https:\/\/RandomNerdTutorials.com \n*********\/\n\n#include <OneWire.h>\n#include <DallasTemperature.h>\n\n\/\/ Data wire is plugged TO GPIO 4\n#define ONE_WIRE_BUS 4\n\n\/\/ Setup a oneWire instance to communicate with any OneWire devices (not just Maxim\/Dallas temperature ICs)\nOneWire oneWire(ONE_WIRE_BUS);\n\n\/\/ Pass our oneWire reference to Dallas Temperature. \nDallasTemperature sensors(&oneWire);\n\n\/\/ Number of temperature devices found\nint numberOfDevices;\n\n\/\/ We'll use this variable to store a found device address\nDeviceAddress tempDeviceAddress; \n\nvoid setup(){\n \/\/ start serial port\n Serial.begin(115200);\n \n \/\/ Start up the library\n sensors.begin();\n \n \/\/ Grab a count of devices on the wire\n numberOfDevices = sensors.getDeviceCount();\n \n \/\/ locate devices on the bus\n Serial.print("Locating devices...");\n Serial.print("Found ");\n Serial.print(numberOfDevices, DEC);\n Serial.println(" devices.");\n\n \/\/ Loop through each device, print out address\n for(int i=0;i<numberOfDevices; i++){\n \/\/ Search the wire for address\n if(sensors.getAddress(tempDeviceAddress, i)){\n Serial.print("Found device ");\n Serial.print(i, DEC);\n Serial.print(" with address: ");\n printAddress(tempDeviceAddress);\n Serial.println();\n } else {\n Serial.print("Found ghost device at ");\n Serial.print(i, DEC);\n Serial.print(" but could not detect address. Check power and cabling");\n }\n }\n}\n\nvoid loop(){ \n sensors.requestTemperatures(); \/\/ Send the command to get temperatures\n \n \/\/ Loop through each device, print out temperature data\n for(int i=0;i<numberOfDevices; i++){\n \/\/ Search the wire for address\n if(sensors.getAddress(tempDeviceAddress, i)){\n \/\/ Output the device ID\n Serial.print("Temperature for device: ");\n Serial.println(i,DEC);\n \/\/ Print the data\n float tempC = sensors.getTempC(tempDeviceAddress);\n Serial.print("Temp C: ");\n Serial.print(tempC);\n Serial.print(" Temp F: ");\n Serial.println(DallasTemperature::toFahrenheit(tempC)); \/\/ Converts tempC to Fahrenheit\n }\n }\n delay(5000);\n}\n\n\/\/ function to print a device address\nvoid printAddress(DeviceAddress deviceAddress) {\n for (uint8_t i = 0; i < 8; i++){\n if (deviceAddress[i] < 16) Serial.print("0");\n Serial.print(deviceAddress[i], HEX);\n }\n}\n<\/code><\/pre>\n\tView raw code<\/a><\/p>\n\n\n\n
How the code works<\/h3>\n\n\n\n
The code uses several useful methods to handle multiple DS18B20 sensors.<\/p>\n\n\n\n
You use the getDeviceCount()<\/span> method to get the number of DS18B20 sensors on the data line.<\/p>\n\n\n\n
numberOfDevices = sensors.getDeviceCount();<\/code><\/pre>\n\n\n\nThe getAddress()<\/span> method finds the sensors addresses:<\/p>\n\n\n\n
if(sensors.getAddress(tempDeviceAddress, i)){<\/code><\/pre>\n\n\n\nThe address is unique for each sensor. So each sensor can be identified by its address.<\/p>\n\n\n\n
Then, you use the getTempC()<\/span> method that accepts as argument the device address. With this method, you can get the temperature from a specific sensor:<\/p>\n\n\n\n
float tempC = sensors.getTempC(tempDeviceAddress);<\/code><\/pre>\n\n\n\nTo get the temperature in Fahrenheit degrees, you can use the getTempF()<\/span>. Alternatively, you can convert the temperature in Celsius to Fahrenheit as follows:<\/p>\n\n\n\n
DallasTemperature::toFahrenheit(tempC)<\/code><\/pre>\n\n\n\nDemonstration<\/h3>\n\n\n\n
After uploading the code, open your Serial Monitor at a baud rate of 115200. You should get all your sensors readings displayed as shown below:<\/p>\n\n\n
\n![\"ESP8266](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2019\/07\/multiple-ds18b20-sensor-serial-monitor-115200.png?resize=708%2C454&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n
\n\n\n\nDisplay DS18B20 Temperature Readings in a Web Server<\/h2>\n\n\n\n
To build the web server we\u2019ll use the\u00a0ESPAsyncWebServer <\/a>library that provides an easy way to build an asynchronous web server. Building an asynchronous web server has several advantages. We recommend taking a quick look at the library documentation on its GitHub page<\/a>.<\/p>\n\n\n\n
Installing the Web Server Libraries<\/h3>\n\n\n\n
We’ll build the web server using the following libraries:<\/p>\n\n\n\n
- \n
- ESPAsyncWebServer by ESP32Async<\/a><\/li>\n\n\n\n
- ESPAsyncTCP by ESP32Async<\/a><\/li>\n<\/ul>\n\n\n\n
You can install these libraries using the Arduino Library Manager. Go to Sketch <\/strong>> Include Library<\/strong> > Manage Libraries<\/strong> and search for the libraries’ names.<\/p>\n\n\n\n
Code (DS18B20 Async Web Server)<\/h3>\n\n\n\n
Open your Arduino IDE and copy the following code.<\/p>\n\n\n
\/*********\n Rui Santos & Sara Santos - Random Nerd Tutorials\n Complete project details at https:\/\/RandomNerdTutorials.com \n*********\/\n\n\/\/ Import required libraries\n#ifdef ESP32\n #include <WiFi.h>\n #include <ESPAsyncWebServer.h>\n#else\n #include <Arduino.h>\n #include <ESP8266WiFi.h>\n #include <Hash.h>\n #include <ESPAsyncTCP.h>\n #include <ESPAsyncWebServer.h>\n#endif\n#include <OneWire.h>\n#include <DallasTemperature.h>\n\n\/\/ Data wire is connected to GPIO 4\n#define ONE_WIRE_BUS 4\n\n\/\/ Setup a oneWire instance to communicate with any OneWire devices\nOneWire oneWire(ONE_WIRE_BUS);\n\n\/\/ Pass our oneWire reference to Dallas Temperature sensor \nDallasTemperature sensors(&oneWire);\n\n\/\/ Variables to store temperature values\nString temperatureF = "";\nString temperatureC = "";\n\n\/\/ Timer variables\nunsigned long lastTime = 0; \nunsigned long timerDelay = 30000;\n\n\/\/ Replace with your network credentials\nconst char* ssid = "REPLACE_WITH_YOUR_SSID";\nconst char* password = "REPLACE_WITH_YOUR_PASSWORD";\n\n\/\/ Create AsyncWebServer object on port 80\nAsyncWebServer server(80);\n\nString readDSTemperatureC() {\n \/\/ Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus\n sensors.requestTemperatures(); \n float tempC = sensors.getTempCByIndex(0);\n\n if(tempC == -127.00) {\n Serial.println("Failed to read from DS18B20 sensor");\n return "--";\n } else {\n Serial.print("Temperature Celsius: ");\n Serial.println(tempC); \n }\n return String(tempC);\n}\n\nString readDSTemperatureF() {\n \/\/ Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus\n sensors.requestTemperatures(); \n float tempF = sensors.getTempFByIndex(0);\n\n if(int(tempF) == -196){\n Serial.println("Failed to read from DS18B20 sensor");\n return "--";\n } else {\n Serial.print("Temperature Fahrenheit: ");\n Serial.println(tempF);\n }\n return String(tempF);\n}\n\nconst char index_html[] PROGMEM = R"rawliteral(\n<!DOCTYPE HTML><html>\n<head>\n <meta name="viewport" content="width=device-width, initial-scale=1">\n <link rel="stylesheet" href="https:\/\/use.fontawesome.com\/releases\/v5.7.2\/css\/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">\n <style>\n html {\n font-family: Arial;\n display: inline-block;\n margin: 0px auto;\n text-align: center;\n }\n h2 { font-size: 3.0rem; }\n p { font-size: 3.0rem; }\n .units { font-size: 1.2rem; }\n .ds-labels{\n font-size: 1.5rem;\n vertical-align:middle;\n padding-bottom: 15px;\n }\n <\/style>\n<\/head>\n<body>\n <h2>ESP DS18B20 Server<\/h2>\n <p>\n <i class="fas fa-thermometer-half" style="color:#059e8a;"><\/i> \n <span class="ds-labels">Temperature Celsius<\/span> \n <span id="temperaturec">%TEMPERATUREC%<\/span>\n <sup class="units">°C<\/sup>\n <\/p>\n <p>\n <i class="fas fa-thermometer-half" style="color:#059e8a;"><\/i> \n <span class="ds-labels">Temperature Fahrenheit<\/span>\n <span id="temperaturef">%TEMPERATUREF%<\/span>\n <sup class="units">°F<\/sup>\n <\/p>\n<\/body>\n<script>\nsetInterval(function ( ) {\n var xhttp = new XMLHttpRequest();\n xhttp.onreadystatechange = function() {\n if (this.readyState == 4 && this.status == 200) {\n document.getElementById("temperaturec").innerHTML = this.responseText;\n }\n };\n xhttp.open("GET", "\/temperaturec", true);\n xhttp.send();\n}, 10000) ;\nsetInterval(function ( ) {\n var xhttp = new XMLHttpRequest();\n xhttp.onreadystatechange = function() {\n if (this.readyState == 4 && this.status == 200) {\n document.getElementById("temperaturef").innerHTML = this.responseText;\n }\n };\n xhttp.open("GET", "\/temperaturef", true);\n xhttp.send();\n}, 10000) ;\n<\/script>\n<\/html>)rawliteral";\n\n\/\/ Replaces placeholder with DS18B20 values\nString processor(const String& var){\n \/\/Serial.println(var);\n if(var == "TEMPERATUREC"){\n return temperatureC;\n }\n else if(var == "TEMPERATUREF"){\n return temperatureF;\n }\n return String();\n}\n\nvoid setup(){\n \/\/ Serial port for debugging purposes\n Serial.begin(115200);\n Serial.println();\n \n \/\/ Start up the DS18B20 library\n sensors.begin();\n\n temperatureC = readDSTemperatureC();\n temperatureF = readDSTemperatureF();\n\n \/\/ Connect to Wi-Fi\n WiFi.begin(ssid, password);\n Serial.println("Connecting to WiFi");\n while (WiFi.status() != WL_CONNECTED) {\n delay(500);\n Serial.print(".");\n }\n Serial.println();\n \n \/\/ Print ESP Local IP Address\n Serial.println(WiFi.localIP());\n\n \/\/ Route for root \/ web page\n server.on("\/", HTTP_GET, [](AsyncWebServerRequest *request){\n request->send(200, "text\/html", index_html, processor);\n });\n server.on("\/temperaturec", HTTP_GET, [](AsyncWebServerRequest *request){\n request->send(200, "text\/plain", temperatureC.c_str());\n });\n server.on("\/temperaturef", HTTP_GET, [](AsyncWebServerRequest *request){\n request->send(200, "text\/plain", temperatureF.c_str());\n });\n \/\/ Start server\n server.begin();\n}\n \nvoid loop(){\n if ((millis() - lastTime) > timerDelay) {\n temperatureC = readDSTemperatureC();\n temperatureF = readDSTemperatureF();\n lastTime = millis();\n } \n}\n<\/code><\/pre>\n\t - ESPAsyncTCP by ESP32Async<\/a><\/li>\n<\/ul>\n\n\n\n
- ESPAsyncWebServer by ESP32Async<\/a><\/li>\n\n\n\n
- DS18B20 temperature sensor <\/a>(one or multiple sensors) \u2013 waterproof version<\/a><\/li>\n\n\n\n
- ESP8266<\/a> – read Best ESP8266 Wi-Fi Development Boards<\/a><\/li>\n\n\n\n
- ESP32\/ESP8266 DS18B20 Temperature Sensor with MicroPython<\/a><\/li>\n\n\n\n
- ESP32 DS18B20 Temperature Sensor with Arduino IDE<\/a><\/li>\n\n\n\n