How to connect your ESP or Arduino with Philips Hue bridge using RESTfull API and HTTP requests.
| 1 | Wemos D1 mini (ESP8266) | ||
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| 1 | PIR Shield V1.0.0 for LOLIN D1 mini | ||
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| 1 | Ambient light Shield V1.0.0 for LOLIN D1 mini | ||
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| 1 | Tripler Base V1.0.0 for LOLIN (WEMOS) D1 mini | ||
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| 1 | Arduino IDE | ||
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In this tutorial, I would like to focus on the basic connection between an ESP8266 and the Philips Hue and show you how to control your Philips Hue system with your Arduino or ESP8266/ESP32.
We go to "register new device" on the Hue bridge and set up the controller to communicate with build-in RESTful API in bridge (commands are sent in HTTP requests and JSON).
The sensor activates the light only when certain levels of light is detected (by default less than 100 lx). If the ambient light sensor level exceeds the set value, a switch-off request is sent and motion detection is ignored.
If the PIR sensor stops to detect motion, the timer is started to switch off the light after a set time interval. A controller LED indicates detected motion.
| /************************************************************* | |
| Philips Hue @ Wemos D1 mini (ESP8266) | |
| Basic demo of PIR and ambient light sensor to demonstrate | |
| communication between ESP and Hue gateway | |
| by Petr Lukas | |
| Functionality: | |
| Sensor activates the light only in case certain level of light is detected | |
| (by default less than 100 lx). If the ambient light sensor light level exceeds the set value, | |
| switch-off request is sent and motion detection is ignored. | |
| If the PIR sensor stops to detect motion, the timer is | |
| started to switch off the light after set time interval. | |
| Controller LED indicates detected motion. | |
| *************************************************************/ | |
| #include <ESP8266HTTPClient.h> | |
| #include <ESP8266WiFi.h> | |
| // Ambient light sensor | |
| #include <Wire.h> | |
| #include <BH1750.h> | |
| // IP of Hue gateway | |
| String ip = "YOUR_IP"; | |
| // Hue gateway user name | |
| String user_name = "YOUR_USERNAME"; | |
| // Light identificator | |
| int light_id = 3; | |
| // Default delay (10 seconds) to switch light back to OFF status | |
| int switch_delay = 10; | |
| // Default ambient light level (100 lx) to prevent light switch when certain light level is detected | |
| int light_level = 100; | |
| // Wifi network SSID | |
| const char* ssid = "YOUR_SSID"; | |
| // Wifi network password | |
| const char* password = "YOUR_PASSWORD"; | |
| const int PIR = D3; | |
| int PIRState = 0; | |
| unsigned long previousMillis = 0; | |
| bool state = false; | |
| BH1750 light(0x23); | |
| void setup() { | |
| // put your setup code here, to run once: | |
| 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"); | |
| // Light level sensor | |
| Wire.begin(); | |
| if (light.begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) { | |
| Serial.println(F("BH1750 Advanced begin")); | |
| } else { | |
| Serial.println(F("Error initialising BH1750")); | |
| } | |
| // PIR sensor | |
| pinMode(PIR, INPUT); | |
| pinMode(BUILTIN_LED, OUTPUT); | |
| // set initial state, LED off | |
| digitalWrite(BUILTIN_LED, HIGH); | |
| } | |
| void loop() { | |
| // Set 125 ms to measure precise light level or switch to CONTINUOUS_LOW_RES_MODE and set 20 ms delay | |
| delay(125); | |
| unsigned long currentMillis = millis(); | |
| PIRState = digitalRead(PIR); | |
| if(getLightlevel() > light_level){ | |
| digitalWrite(BUILTIN_LED, HIGH); | |
| if(state == true) switchLight(1, false); | |
| return; | |
| } | |
| if (PIRState == HIGH) { | |
| digitalWrite(BUILTIN_LED, LOW); // LED on | |
| previousMillis = currentMillis; | |
| if(state == true) return; | |
| switchLight(1, true); | |
| } else { | |
| digitalWrite(BUILTIN_LED, HIGH); // LED off | |
| if(state == false) return; | |
| if (currentMillis - previousMillis >= (switch_delay*1000)){ | |
| previousMillis = currentMillis; | |
| switchLight(1, false); | |
| return; | |
| } | |
| } | |
| } | |
| int getLightlevel(){ | |
| uint16_t lux = light.readLightLevel(); | |
| // Uncomment these lines to detect and set proper light level | |
| //Serial.print("Light: "); | |
| //Serial.print(lux); | |
| //Serial.println(" lx"); | |
| return lux; | |
| } | |
| 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 += 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); | |
| 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(); | |
| } |
Go here to read Smart Home Automated Lights With ESP8266 and Philips Hue (part 2)!
Application Software Developer, Performance and capacity reporting for IBM zSeries team, experimenting with home automation, sensors, Arduino and ESP
