339 lines
8.6 KiB
C++
339 lines
8.6 KiB
C++
/**********************************************************************
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Nis Wechselberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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**********************************************************************/
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/**********************************************************************
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* ESP8266-RGB-MQTT
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*
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* Links the ESP8266 based RGB led strip to an mqtt broker.
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* The program uses multiple topics for incoming and outgoing messages.
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* Incoming topics:
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* - <mqtt_device>/power
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* - <mqtt_device>/color
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* - <mqtt_device>/breathing
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* - <mqtt_device>/cycle
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* Outgoing topics:
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*
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**********************************************************************/
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#include <ESP8266WiFi.h>
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#include <ESP8266mDNS.h>
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#include <WiFiUdp.h>
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#include <ArduinoOTA.h>
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#include <PubSubClient.h>
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#include "ESP8266-MQTT-RGBControl.h"
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// Global mqtt client object
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WiFiClient espClient;
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PubSubClient client(espClient);
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// RGB strip pin configuration
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const unsigned char pin[3] = {14,16,12};
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// Color values for the pwm outputs
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unsigned char rgbColor[3];
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// Scaling factors for color calibration
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const float calibration[3] = {1.0, 1.0, 0.7};
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// Flagss to determine if all necessary information
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// has been gathered from mqtt broker
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unsigned char isColorSet = 0;
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unsigned char isCycleSet = 0;
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unsigned char isBreatheSet = 0;
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unsigned char isPowerSet = 0;
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// Scaling factors for different color adjustments
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unsigned char powerFactor = 0;
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unsigned char doColorCycle = 0;
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unsigned char doBreathe = 0;
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float breathScale = 0.999;
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float breathAdjustment = -0.001;
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// Global scaling for pwm, due to pwm scale 0..1023
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const float globalScale = 3.0;
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// Pointer to the current decreasing color
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unsigned char decColor = 0;
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// Timestamp for last color update
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unsigned long lastColorUpdate = 0;
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// Timestamp for last publish
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unsigned long lastMsg = 0;
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unsigned long publishInterval = 5000;
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// Message buffer
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char msg[50];
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/*
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* Initial setup for arduino
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*/
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void setup() {
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// Configure serial port
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Serial.begin(115200);
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delay(10);
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// Prepare WiFi connection
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setup_wifi();
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// Connect to mqtt broker
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client.setServer(mqtt_server, 1883);
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client.setCallback(incoming_mqtt);
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}
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/*
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* Prepares the wireless connection
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*/
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void setup_wifi() {
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// Connect to the WiFi as a client
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WiFi.mode(WIFI_STA);
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// Do the connection
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected");
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// Print IP address to serial
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Serial.print("My IP address: ");
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Serial.println(WiFi.localIP());
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ArduinoOTA.setHostname(ota_hostname);
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ArduinoOTA.setPassword(ota_hostname);
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ArduinoOTA.begin();
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}
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/*
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* Callback method for incoming mqtt messages
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*/
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void incoming_mqtt(char* topic, byte* payload, unsigned int length) {
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Serial.print("Message arrived [");
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Serial.print(topic);
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Serial.print("] ");
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for (int i = 0; i < length; i++) {
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Serial.print((char)payload[i]);
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}
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Serial.println();
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if (strcmp(topic, mqtt_topic_power) == 0) {
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isPowerSet = 1;
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if (length == 1) {
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Serial.println("Setting power factor");
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if ((char)payload[0] == '1') {
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powerFactor = 1;
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} else {
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powerFactor = 0;
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}
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}
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}
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if (strcmp(topic, mqtt_topic_color) == 0) {
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isColorSet = 1;
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if (length == 7 && (char)payload[0] == '#') {
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Serial.println("Setting color");
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// Parse hex input to color values
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unsigned char i = 0;
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unsigned char colorValue;
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while (i < 6) {
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// Reset parsing container at start of color
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if (i % 2 == 0) {
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colorValue = 0;
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}
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// Grab current char
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char data = (char) payload[i+1];
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char value = 0;
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if (data >= '0' && data <= '9') {
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value = data - '0';
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}
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if (data >= 'A' && data <= 'F') {
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value = data - 'A';
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value += 10;
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}
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if (data >= 'a' && data <= 'f') {
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value = data;
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value += 10;
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}
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if (i % 2 == 0) {
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// First hex digit, shift value to the left
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value = value << 4;
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}
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// Add parsed value to accumulator
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colorValue += value;
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if (i % 2 == 1) {
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// Write colorValue to rgbValue
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rgbColor[i/2] = colorValue;
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}
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i += 1;
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}
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}
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}
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if (strcmp(topic, mqtt_topic_cycle) == 0) {
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isCycleSet = 1;
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if (length == 1) {
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Serial.println("Setting color cycling");
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if ((char)payload[0] == '1') {
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if (!doColorCycle) {
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doColorCycle = 1;
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// Reset decreasing color
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decColor = 0;
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}
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} else {
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if (doColorCycle) {
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doColorCycle = 0;
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}
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}
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}
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}
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if (strcmp(topic, mqtt_topic_breathe) == 0) {
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isBreatheSet = 1;
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if (length == 1) {
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Serial.println("Setting color breathing");
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if ((char)payload[0] == '1') {
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if (!doBreathe) {
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doBreathe = 1;
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breathScale = 0.999;
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breathAdjustment = -0.001;
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}
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} else {
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if (doBreathe) {
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doBreathe = 0;
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breathScale = 1.0;
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}
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}
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}
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}
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}
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/*
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* Blocking reconnect to the mqtt broker
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*/
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void reconnect() {
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// Loop until we're reconnected
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while (!client.connected()) {
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Serial.print("Attempting MQTT connection...");
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// Attempt to connect
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if (client.connect(mqtt_device)) {
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Serial.println("connected");
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// Once connected, publish an announcement...
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// client.publish("outTopic", "hello world");
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// subscribe to incoming topics
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client.subscribe(mqtt_topic_power);
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client.subscribe(mqtt_topic_color);
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client.subscribe(mqtt_topic_cycle);
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client.subscribe(mqtt_topic_breathe);
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} else {
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Serial.print("failed, rc=");
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Serial.print(client.state());
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Serial.println(" try again in 5 seconds");
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// Wait 5 seconds before retrying
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delay(5000);
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}
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}
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}
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void updateLight() {
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if (doColorCycle) {
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updateColorCycling();
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}
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if (doBreathe) {
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updateBreathing();
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}
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setColor();
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}
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void updateColorCycling() {
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if (rgbColor[0] == 0 && rgbColor[1] == 0 && rgbColor[2] == 0) {
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rgbColor[0] = 255;
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decColor = 0;
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}
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unsigned char incColor = (decColor + 1) % 3;
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if (rgbColor[decColor] > 0) {
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rgbColor[decColor] -= 1;
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}
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if (rgbColor[incColor] < 255) {
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rgbColor[incColor] += 1;
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}
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if (rgbColor[incColor] == 255 && rgbColor[decColor] == 0) {
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decColor = incColor;
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}
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}
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void updateBreathing() {
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breathScale += breathAdjustment;
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if (breathScale <= 0.001 || breathScale >= 0.999) {
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breathAdjustment = 0 - breathAdjustment;
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}
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}
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void setColor() {
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for (int i = 0; i < 3; ++i) {
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analogWrite(pin[i], rgbColor[i] * powerFactor * globalScale * breathScale * calibration[i]);
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}
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}
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void publishState() {
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snprintf(msg, 49, "%d", powerFactor);
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client.publish(mqtt_topic_powerState, msg);
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snprintf(msg, 49, "#%02X%02X%02X", rgbColor[0], rgbColor[1], rgbColor[2]);
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client.publish(mqtt_topic_colorState, msg);
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snprintf(msg, 49, "%d", doBreathe);
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client.publish(mqtt_topic_breatheState, msg);
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snprintf(msg, 49, "%d", doColorCycle);
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client.publish(mqtt_topic_cycleState, msg);
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}
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void loop() {
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// Check OTA update
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ArduinoOTA.handle();
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if (!client.connected()) {
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reconnect();
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}
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client.loop();
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unsigned long now = millis();
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if (isPowerSet & isColorSet & isCycleSet & isBreatheSet) {
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if (now - lastColorUpdate > 30) {
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lastColorUpdate = now;
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updateLight();
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}
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}
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if (now - lastMsg > publishInterval) {
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lastMsg = now;
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publishState();
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}
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}
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