Smart Home Automated Lights With ESP8266 and Philips Hue (part 2)

April 21, 2019

How to connect your ESP or Arduino with Philips Hue bridge using RESTfull API and HTTP requests.

Materials
Project

Hardware
1	Wemos D1 mini (ESP8266)	$ 3.5
1	Lolin D32 Pro (ESP32)	$ 8.8
1	TFT 2.4 Touch Shield V1.0.0 for LOLIN	$ 5.9
1	IR Controller Shield V1.0.0 for LOLIN	$ 1.4

Software
1	Arduino IDE

In this tutorial, I'm going to show you how to connect your ESP or Arduino with Philips Hue bridge using RESTfull API and HTTP requests.

I would like to continue with the idea of using a microcontroller with the Philips Hue system. I will do this by extending the light control capabilities with IR remote control (e.g., a simple remote control from a television) or make an interactive switch with TFT shield for ESP32 Lolin D32 with simple power consumption monitoring.

The ideas above are a few basic concepts and several other details need to be solved for real use (location of IR sensor, detection of the current state of the bulb by API getter, etc.)

Required Hardware

Required Libraries

Project Code

/*************************************************************

Hue @ D1 mini Pro (ESP8266)

Basic demo of switch based on IR sensor to demonstrate 

communication between ESP and Hue gateway

Version: 1.00

by Petr Lukas

Functionality:

Identify IR signal and switch light on and off using IR remote control.

*************************************************************/

#include <IRremoteESP8266.h>

#include <IRrecv.h>

#include <IRutils.h>

#include <ESP8266HTTPClient.h>

#include <ESP8266WiFi.h>

// Wifi network SSID

const char* ssid = "YOUR_SSID";

// Wifi network password

const char* password = "YOUR_PASSWORD";

// IP of Hue gateway

String ip = "YOUR_HUE_BRIDGE_IP";

// Set IR signal number (copy it from serial output) to switch light on and off

int switch_on = 0xE0E048B7;

int switch_off = 0xE0E008F7;

// Hue gateway user name

String user_name = "YOUR_HUE_AUTHORIZED_USER";

#define RECV_PIN D4

#define MIN_UNKNOWN_SIZE 20

IRrecv irrecv(RECV_PIN);

decode_results results;

bool state = false;

void setup() {

 Serial.begin(115200);

 WiFi.begin(ssid, password); 

 Serial.print("Connecting to WiFi");

 while (WiFi.status() != WL_CONNECTED) {

 delay(1000);

 Serial.print(".");

 }

 Serial.println("Connected to the WiFi network"); 

 irrecv.enableIRIn(); // Start the receiver

 while (!Serial) // Wait for the serial connection to be establised.

 delay(50);

 Serial.println();

 Serial.print("IR receiver is now running and waiting for IR message on Pin ");

 Serial.println(RECV_PIN);

 irrecv.setUnknownThreshold(MIN_UNKNOWN_SIZE);

}

void loop() {

 if (irrecv.decode(&results)) {

 // print() & println() can't handle printing long longs. (uint64_t)

 serialPrintUint64(results.value, HEX);

 Serial.println("");

 if(results.value == switch_on){

 switchLight(1,true);

 delay(500);

 }

 if(results.value == switch_off){

 switchLight(1,false);

 delay(500);

 }

 irrecv.resume(); // Receive the next value

 }

 delay(100);

}

void switchLight(byte room, bool current_state){

 state = current_state;

 HTTPClient http; 

 String req_string;

 req_string = "http://";

 req_string += ip;

 req_string += "/api/";

 req_string += user_name;

 req_string += "/lights/";

 req_string += room;

 req_string += "/state";

 Serial.println(req_string);

 http.begin(req_string);

 http.addHeader("Content-Type", "text/plain");

 String put_string;

 put_string = "{\"on\":";

 put_string += (current_state)? "true" : "false";

 put_string += "}";

 int httpResponseCode = http.PUT(put_string);

 if(httpResponseCode > 0){

 String response = http.getString(); 

 Serial.println(httpResponseCode);

 Serial.println(response); 

 } else {

 Serial.print("Error on sending PUT Request: ");

 Serial.println(httpResponseCode);

 }

 http.end();

}

view raw philips_hue_ir.ino hosted with ❤ by GitHub

/*************************************************************

Hue @ Lolin D32 Pro (ESP32)

Basic demo of switch based on touch TFT display to demonstrate 

communication between ESP and Hue gateway

Version: 1.00

by Petr Lukas

Functionality:

Touch a button on TFT to switch on and off the lights.

*************************************************************/

#include <WiFi.h>

#include <HTTPClient.h>

#include <Adafruit_GFX.h>

#include <Adafruit_ImageReader.h>

#include <Adafruit_ILI9341.h>

#include <SPI.h>

#include <SD.h>

// Touchscreen library

#include <XPT2046_Touchscreen.h>

// Fonts

#include <Fonts/FreeMono9pt7b.h>

#include <Fonts/FreeSansBold9pt7b.h>

#include <Fonts/FreeSansBold12pt7b.h>

// Default pin numbers for D32 Pro

#define TFT_CS 14

#define TFT_DC 27

#define TFT_RST 33

#define TS_CS 12

// SD card pin

#define SD_CS 4

// IP of Hue gateway

String ip = "YOUR_HUE_BRIDGE_IP";

// Hue gateway user name

String user_name = "YOUR_HUE_AUTHORIZED_USER";

// Wifi network SSID

const char* ssid = "YOUR_SSID";

// Wifi network password

const char* password = "YOUR_PASSWORD";

// Power consumtion per bulb

float consumption = 8.5; // Let's assume consumption of bulb in full light is 8.5 W

unsigned long previousMillis = 0;

bool state1 = false;

bool state2 = false;

bool state3 = false;

float total_consumption = 0;

int runtime = 0;

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

Adafruit_ImageReader reader;

XPT2046_Touchscreen ts(TS_CS);

void setup() {

 // put your setup code here, to run once:

 Serial.begin(115200);

 tft.begin();

 tft.setFont(&FreeMono9pt7b);

 tft.fillScreen(ILI9341_BLACK);

 tft.setCursor(0, 15);

 tft.println("Init SD card...");

 if (!SD.begin(SD_CS)) {

 tft.setTextColor(ILI9341_RED);

 Serial.println("SD card failed");

 tft.println("Failed!");

 delay(999999);

 return;

 }

 WiFi.begin(ssid, password); 

 tft.println("Connecting to WiFi");

 Serial.print("Connecting to WiFi");

 while (WiFi.status() != WL_CONNECTED) {

 delay(1000);

 Serial.print(".");

 }

 Serial.println("Connected to the WiFi network"); 

 tft.println("Success");

 delay(500);

 tft.println("Init touchscreen...");

 ts.begin();

 tft.println("Setup complete");

 tft.println("Starting loop...");

 delay(500);

 tft.fillScreen(ILI9341_BLACK);

 drawButtons();

}

void switchLight(byte light_id, bool current_state, int x, int y){

 HTTPClient http; 

 String req_string;

 req_string = "http://";

 req_string += ip;

 req_string += "/api/";

 req_string += user_name;

 req_string += "/lights/";

 req_string += light_id;

 req_string += "/state";

 Serial.println(req_string);

 http.begin(req_string);

 http.addHeader("Content-Type", "text/plain");

 String put_string;
 
 put_string = "{\"on\":";

 put_string += (current_state)? "true" : "false";

 put_string += "}";

 int httpResponseCode = http.PUT(put_string);

 // Change button only in case the operation is successfull

 if(httpResponseCode == 200){

 toggleButton(x,y,current_state);

 }

 if(httpResponseCode > 0){

 String response = http.getString(); 

 Serial.println(httpResponseCode);

 Serial.println(response); 

 } else {

 Serial.print("Error on sending PUT Request: ");

 Serial.println(httpResponseCode);

 }

 http.end();

}

void drawButtons(){

 int y = 115;

 int y_space = 60;

 reader.drawBMP("/wemos.bmp", tft, 10, 20);

 reader.drawBMP("/hue.bmp", tft, 180, 20);

 reader.drawBMP("/off.bmp", tft, 130, y);

 reader.drawBMP("/off.bmp", tft, 130, y + y_space);

 reader.drawBMP("/off.bmp", tft, 130, y + y_space*2);

 tft.setFont(&FreeSansBold12pt7b);

 y = y + 22;

 tft.setCursor(3, y);

 tft.println("Hall:");

 tft.setCursor(3, y + y_space);

 tft.println("Bedroom:");

 tft.setCursor(3, y + y_space*2);

 tft.println("Bathroom:");

 tft.setFont(&FreeSansBold9pt7b);

 tft.setCursor(50, 310);

 tft.println("0.00 Wh | 0 min");

}

void toggleButton(int x, int y, bool state){

 if(state){

 reader.drawBMP("/on.bmp", tft, x, y);

 } else {

 reader.drawBMP("/off.bmp", tft, x, y);

 }

}

void loop() {

 unsigned long currentMillis = millis();

 if (currentMillis - previousMillis >= 1000){

 if(state1)total_consumption += consumption/3600;

 if(state2)total_consumption += consumption/3600;

 if(state3)total_consumption += consumption/3600;

 runtime++;

 tft.setFont(&FreeSansBold9pt7b);

 tft.setCursor(50, 310);

 tft.fillRect(0,285,240,320,ILI9341_BLACK);

 tft.print(total_consumption,2);

 tft.print(" Wh | ");

 tft.print(runtime/60);

 tft.print(" min");

 previousMillis = currentMillis;

 }

 if (ts.touched()) {

 TS_Point p = ts.getPoint();

 // You need to test coordinates (in this case landscape oriented)

 /*

 tft.setCursor(0,50);

 tft.fillRect(0,30,100,50,ILI9341_BLACK);

 tft.println(p.x);

 tft.println(p.y);

 */

 if((p.x < 2500 && p.x > 2000) && (p.y < 1800 && p.y > 300)){

 state1 = !state1;

 switchLight(1, state1, 130, 115);

 }

 if((p.x < 2000 && p.x > 1500) && (p.y < 1800 && p.y > 300)){

 state2 = !state2;

 switchLight(2, state2, 130, 175);

 }

 if((p.x < 1500 && p.x > 1000) && (p.y < 1800 && p.y > 300)){

 state3 = !state3;

 switchLight(3, state3, 130, 235);

 }

 delay(500);

 }

}

view raw philips_hue_tft.ino hosted with ❤ by GitHub

Watch the video below to see how I do!

Petr Lukáš

Application Software Developer, Performance and capacity reporting for IBM zSeries team, experimenting with home automation, sensors, Arduino and ESP

Author

How to connect your ESP or Arduino with Philips Hue bridge using RESTfull API and HTTP requests.

Required Hardware

Required Libraries

Project Code

Categories

Tags

	/*************************************************************
	Hue @ D1 mini Pro (ESP8266)
	Basic demo of switch based on IR sensor to demonstrate
	communication between ESP and Hue gateway
	Version: 1.00
	by Petr Lukas

	Functionality:
	Identify IR signal and switch light on and off using IR remote control.
	*************************************************************/
	#include <IRremoteESP8266.h>
	#include <IRrecv.h>
	#include <IRutils.h>

	#include <ESP8266HTTPClient.h>
	#include <ESP8266WiFi.h>

	// Wifi network SSID
	const char* ssid = "YOUR_SSID";

	// Wifi network password
	const char* password = "YOUR_PASSWORD";

	// IP of Hue gateway
	String ip = "YOUR_HUE_BRIDGE_IP";

	// Set IR signal number (copy it from serial output) to switch light on and off
	int switch_on = 0xE0E048B7;
	int switch_off = 0xE0E008F7;

	// Hue gateway user name
	String user_name = "YOUR_HUE_AUTHORIZED_USER";

	#define RECV_PIN D4
	#define MIN_UNKNOWN_SIZE 20

	IRrecv irrecv(RECV_PIN);

	decode_results results;

	bool state = false;

	void setup() {
	Serial.begin(115200);

	WiFi.begin(ssid, password);

	Serial.print("Connecting to WiFi");
	while (WiFi.status() != WL_CONNECTED) {
	delay(1000);
	Serial.print(".");
	}
	Serial.println("Connected to the WiFi network");

	irrecv.enableIRIn(); // Start the receiver
	while (!Serial) // Wait for the serial connection to be establised.
	delay(50);
	Serial.println();
	Serial.print("IR receiver is now running and waiting for IR message on Pin ");
	Serial.println(RECV_PIN);
	irrecv.setUnknownThreshold(MIN_UNKNOWN_SIZE);
	}

	void loop() {
	if (irrecv.decode(&results)) {
	// print() & println() can't handle printing long longs. (uint64_t)
	serialPrintUint64(results.value, HEX);
	Serial.println("");

	if(results.value == switch_on){
	switchLight(1,true);
	delay(500);
	}

	if(results.value == switch_off){
	switchLight(1,false);
	delay(500);
	}

	irrecv.resume(); // Receive the next value
	}
	delay(100);
	}

	void switchLight(byte room, bool current_state){
	state = current_state;
	HTTPClient http;
	String req_string;
	req_string = "http://";
	req_string += ip;
	req_string += "/api/";
	req_string += user_name;
	req_string += "/lights/";
	req_string += room;
	req_string += "/state";
	Serial.println(req_string);
	http.begin(req_string);
	http.addHeader("Content-Type", "text/plain");

	String put_string;
	put_string = "{\"on\":";
	put_string += (current_state)? "true" : "false";
	put_string += "}";

	int httpResponseCode = http.PUT(put_string);

	if(httpResponseCode > 0){
	String response = http.getString();
	Serial.println(httpResponseCode);
	Serial.println(response);
	} else {
	Serial.print("Error on sending PUT Request: ");
	Serial.println(httpResponseCode);
	}
	http.end();
	}

	/*************************************************************
	Hue @ Lolin D32 Pro (ESP32)
	Basic demo of switch based on touch TFT display to demonstrate
	communication between ESP and Hue gateway
	Version: 1.00
	by Petr Lukas

	Functionality:
	Touch a button on TFT to switch on and off the lights.
	*************************************************************/
	#include <WiFi.h>
	#include <HTTPClient.h>

	#include <Adafruit_GFX.h>
	#include <Adafruit_ImageReader.h>
	#include <Adafruit_ILI9341.h>

	#include <SPI.h>
	#include <SD.h>

	// Touchscreen library
	#include <XPT2046_Touchscreen.h>

	// Fonts
	#include <Fonts/FreeMono9pt7b.h>
	#include <Fonts/FreeSansBold9pt7b.h>
	#include <Fonts/FreeSansBold12pt7b.h>

	// Default pin numbers for D32 Pro
	#define TFT_CS 14
	#define TFT_DC 27
	#define TFT_RST 33
	#define TS_CS 12

	// SD card pin
	#define SD_CS 4

	// IP of Hue gateway
	String ip = "YOUR_HUE_BRIDGE_IP";

	// Hue gateway user name
	String user_name = "YOUR_HUE_AUTHORIZED_USER";

	// Wifi network SSID
	const char* ssid = "YOUR_SSID";

	// Wifi network password
	const char* password = "YOUR_PASSWORD";

	// Power consumtion per bulb
	float consumption = 8.5; // Let's assume consumption of bulb in full light is 8.5 W


	unsigned long previousMillis = 0;
	bool state1 = false;
	bool state2 = false;
	bool state3 = false;
	float total_consumption = 0;
	int runtime = 0;

	Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
	Adafruit_ImageReader reader;
	XPT2046_Touchscreen ts(TS_CS);

	void setup() {
	// put your setup code here, to run once:
	Serial.begin(115200);
	tft.begin();
	tft.setFont(&FreeMono9pt7b);
	tft.fillScreen(ILI9341_BLACK);
	tft.setCursor(0, 15);

	tft.println("Init SD card...");
	if (!SD.begin(SD_CS)) {
	tft.setTextColor(ILI9341_RED);
	Serial.println("SD card failed");
	tft.println("Failed!");
	delay(999999);
	return;
	}

	WiFi.begin(ssid, password);

	tft.println("Connecting to WiFi");
	Serial.print("Connecting to WiFi");
	while (WiFi.status() != WL_CONNECTED) {
	delay(1000);
	Serial.print(".");
	}
	Serial.println("Connected to the WiFi network");
	tft.println("Success");
	delay(500);

	tft.println("Init touchscreen...");
	ts.begin();

	tft.println("Setup complete");
	tft.println("Starting loop...");
	delay(500);

	tft.fillScreen(ILI9341_BLACK);
	drawButtons();
	}
	void switchLight(byte light_id, bool current_state, int x, int y){
	HTTPClient http;
	String req_string;
	req_string = "http://";
	req_string += ip;
	req_string += "/api/";
	req_string += user_name;
	req_string += "/lights/";
	req_string += light_id;
	req_string += "/state";
	Serial.println(req_string);
	http.begin(req_string);
	http.addHeader("Content-Type", "text/plain");

	String put_string;
	put_string = "{\"on\":";
	put_string += (current_state)? "true" : "false";
	put_string += "}";

	int httpResponseCode = http.PUT(put_string);

	// Change button only in case the operation is successfull
	if(httpResponseCode == 200){
	toggleButton(x,y,current_state);
	}

	if(httpResponseCode > 0){
	String response = http.getString();
	Serial.println(httpResponseCode);
	Serial.println(response);
	} else {
	Serial.print("Error on sending PUT Request: ");
	Serial.println(httpResponseCode);
	}
	http.end();
	}

	void drawButtons(){
	int y = 115;
	int y_space = 60;

	reader.drawBMP("/wemos.bmp", tft, 10, 20);
	reader.drawBMP("/hue.bmp", tft, 180, 20);
	reader.drawBMP("/off.bmp", tft, 130, y);
	reader.drawBMP("/off.bmp", tft, 130, y + y_space);
	reader.drawBMP("/off.bmp", tft, 130, y + y_space*2);

	tft.setFont(&FreeSansBold12pt7b);

	y = y + 22;

	tft.setCursor(3, y);
	tft.println("Hall:");

	tft.setCursor(3, y + y_space);
	tft.println("Bedroom:");

	tft.setCursor(3, y + y_space*2);
	tft.println("Bathroom:");

	tft.setFont(&FreeSansBold9pt7b);
	tft.setCursor(50, 310);
	tft.println("0.00 Wh \| 0 min");
	}

	void toggleButton(int x, int y, bool state){
	if(state){
	reader.drawBMP("/on.bmp", tft, x, y);
	} else {
	reader.drawBMP("/off.bmp", tft, x, y);
	}
	}

	void loop() {
	unsigned long currentMillis = millis();
	if (currentMillis - previousMillis >= 1000){
	if(state1)total_consumption += consumption/3600;
	if(state2)total_consumption += consumption/3600;
	if(state3)total_consumption += consumption/3600;

	runtime++;

	tft.setFont(&FreeSansBold9pt7b);
	tft.setCursor(50, 310);
	tft.fillRect(0,285,240,320,ILI9341_BLACK);
	tft.print(total_consumption,2);
	tft.print(" Wh \| ");
	tft.print(runtime/60);
	tft.print(" min");
	previousMillis = currentMillis;
	}

	if (ts.touched()) {
	TS_Point p = ts.getPoint();
	// You need to test coordinates (in this case landscape oriented)
	/*
	tft.setCursor(0,50);
	tft.fillRect(0,30,100,50,ILI9341_BLACK);
	tft.println(p.x);
	tft.println(p.y);
	*/
	if((p.x < 2500 && p.x > 2000) && (p.y < 1800 && p.y > 300)){
	state1 = !state1;
	switchLight(1, state1, 130, 115);
	}
	if((p.x < 2000 && p.x > 1500) && (p.y < 1800 && p.y > 300)){
	state2 = !state2;
	switchLight(2, state2, 130, 175);
	}
	if((p.x < 1500 && p.x > 1000) && (p.y < 1800 && p.y > 300)){
	state3 = !state3;
	switchLight(3, state3, 130, 235);
	}
	delay(500);
	}
	}