mateuszlesko / NodeMCU_LED_Control

the simple project to figuring out how to control end device via http with ESP8266

Node MCU LED Control:

About project

Thanks to this project I have learned how to control actuating device (LED diodes) via sending requests http.

To represent LED lights I used power of 2:

GREEN = 2^0 = 1

YELLOW = 2^1 = 2

RED = 2^2 = 4

Project contains:

• http server written in GO,
• client code for ESP8266 in INO = listening one endpoint, and depending on its value control LEDs

Project features:

• control LED lights via HTTP
• logging of LED changes

HARDRWARE PART:

Traffic lights LED module:

ESP 8266 : Pinouts

ESP8266 PINOUT	LED MODULE
GND	GND
D1	R
D2	Y
D4	G

SERVER ENPOINTS:

Set LED's status:

`http://IP:5108/led/setstatus?led=value`

Where:

• IP = your computer's IP address, where api is running
• Value = Integer value from 0 to 7

LED Statues:

Check LED's status:

http://IP:5108/led/checkstatus

Return: integer value which representing LEDs turn on status (see table above)

RUN PROJECT INSTRUCTION:

1. RUN server:
   1. go to web folder
   2. use command go run .
2. ESP8266:
   1. use Arduino IDE to edit code: edit SSID and password
   2. connect LED module to ESP8266 in the right way
   3. upload code to your ESP via Arduino IDE
3. TEST:
   1. Send request via Postman to endpoint: /led/setstatus?led=
   2. Observe change on LED lights