Tuesday, December 1, 2015

ESP8266 IoT Control RGBLED Light form Espressif IoT Demo Source Code

ESP8266 IoT Control RGBLED Light form Espressif IoT Demo Source Code
We introduce embedded applications based on Espressif’s SoC with WiFi connectivity ESP8266. The IoT demo applications here showcase how you can develop an entire application with this single SoC, and to realize smart connectivity.

The SDK provides a set of interfaces for data receive and transmit functions over the WiFi and TCP/IP layer so programmers can focus on application development on the high level. Users can easilymake use of the corresponding interfaces to realize data receive and transmit.
All networking functions on the ESP8266 IoT platform are realized in the library, and are not transparent to users.

System Diagram
Default IP address of SoftAP mode is In station mode the IP address is assigned by router. The IP address in the URL represents IP in SoftAP and station mode depending on which is required.

Wiring Diagram
ESP8266 Pin GPIO_12 to R LED 
ESP8266 Pin GPIO_13 to B LED 
ESP8266 Pin GPIO_15 to G LED 

How to Control
( HTTP Protocol )

GET Command Info

    "Version": {
        "hardware": "0.1",
        "sdk_version": "1.3.0",
        "iot_version": "v1.0.5t45772(a)"
    "Device": {
        "product": "Light",
        "manufacturer": "Espressif Systems"


GET Light Status

Response {
    "period": 1000,
    "rgb": {
        "red": 22222,
        "green": 22222,
        "blue": 22222,
        "cwhite": 22222,
        "wwhite": 22222


POST Control Light in Red , Green , Blue     POST
JSON {"freq":100,"rgb":{"red":XXX,"green":XXX,"blue":XXX}}

Source Code
Mikhail Grigoriev’s Unofficial Development Kit for Espressif ESP8266.

The IoT demo source code of is in the "usr" folder, and the details are as follows:
user_main.cmain file
user_webserver.ccreates a TCP server, provides REST light weighted webserver function
user_devicefind.ccreates a UDP transmission, provides device look-up function
user_esp_platform.ccommunicate with Espressif Cloud
user_json.cjson packet processing function
user_plug.cdemo of plug device
user_light.cdemo of PWM light device

user_humiture.cdemo of humidity-temperature sensor device

SDK Development Guide 

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