- NodeMCU ESP8266 Chip or any other ESP8266 chip
- 1602A 16x2 LCD Display
- I2C LCD Backpack
- Some wires and breadboard
- DHT11 Temperature Sensor
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Step 1: Attaching ESP8266 on Breadboard
- This step is connecting the chip on to the breadboard .
- Do not connect any wires yet.
The board should look like above picture without the wires .
Step 2: Connect I2C Backpack to LCD Display
In this step you are to connect the I2C backpack board to the main 1602A LCD Board.
The I2C Board exposes only four wire pins
Step 3: Temperature Sensor DHT11
Place the DHT11 Sensor on bread board as shown in image.
Step 4: Wiring Connections
- GND - ESP8266 GND Pin
- VCC - ESP8266 3.3 V Pin
- Data - ESP8266 RX Pin
LCD I2C Wiring
- GND - ESP8266 GND
- VCC - ESP8266 5V Pin
- SDA - ESP8266 D2 Pin
- SCL - ESP8266 D1 Pin
- Connect with micro usb cable to laptop
- Make sure you have the USB to UART Driver installed
- Install Arduino and install the below libraries and boards
- LiquidCrystal I2C
Then publish it and voila it will start showing the temperature and humidity in your lcd . Make sure to change Wifi config in code.
Also if you open browser : http://iot-web.local/api
It will also show an api with same sensor data