ESP8266 and Multiple Temperature Sensors DS18b20 With HTTP Server

I will show you how to make a remote temperature reading. You will be able to connect multiple

temperature sensors DS18B20. Temperature measurement will be the HTTP server on ESP8266 12e V3.

Source code was written in the Arduino IDE.

Step 1: Components

• ESP8266 12e V3
• 3 x DS18b20
• Resistor 4k7 ohma
• Few wires

Step 2: Connect the DS18b20 to ESP8266

1) Connect the temperature sensors DS18B20 parallel

2) Connect resistor 4k7 one pin to VCC and the second pin to the DQ

3) ESP8266 GND - GND DS18B20

ESP8266 3V3 - DS18B20 VCC

ESP8266 D3 - DS18B20 DQ

Step 3: Setup Your WiFi Connection

You can download Arduino IDE from here Dwonload Arduino IDE

In this project I am using the Arduino IDE 1.8.1

Before you upload the software to ESP8266 setup your WiFi connection.

//WIFI

const char* ssid = "";

const char* password = "";

Download source code: HTTP_DS18B20.ino

Step 4: Flashing ESP8266 12e V3 With Arduino IDE

1. Connect your ESP8266 to PC via USB port.
2. Select ESP8266 board.
3. Select COM port with your ESP8266.
4. Press upload button in Arduino IDE

Step 5: Testing HTTP Server on ESP8266

• 1) Open serial monitor in Arduino IDE.
• 2) Get your server IP from serial monitor.
• 3) Now open WWW page in your browser.

I connect three temperature sensors to my ESP8266 12e V3.
Measuring the temperature every 5 seconds, but you can change this value.

See also:
SONOFF - ESP8266 update firmware with Aduino IDE
ESP8266 wiht DS1307 RTC, NV SRAM and Square-Wave output signal