71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
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#include "wled.h"
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/*
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* This v1 usermod file allows you to add own functionality to WLED more easily
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* See: https://github.com/Aircoookie/WLED/wiki/Add-own-functionality
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* EEPROM bytes 2750+ are reserved for your custom use case. (if you extend #define EEPSIZE in const.h)
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* If you just need 8 bytes, use 2551-2559 (you do not need to increase EEPSIZE)
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*
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* Consider the v2 usermod API if you need a more advanced feature set!
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*/
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//Use userVar0 and userVar1 (API calls &U0=,&U1=, uint16_t)
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const int LIGHT_PIN = A0; // define analog pin
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const long UPDATE_MS = 30000; // Upper threshold between mqtt messages
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const char MQTT_TOPIC[] = "/light"; // MQTT topic for sensor values
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const int CHANGE_THRESHOLD = 5; // Change threshold in percentage to send before UPDATE_MS
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// variables
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long lastTime = 0;
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long timeDiff = 0;
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long readTime = 0;
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int lightValue = 0;
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float lightPercentage = 0;
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float lastPercentage = 0;
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//gets called once at boot. Do all initialization that doesn't depend on network here
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void userSetup()
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{
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pinMode(LIGHT_PIN, INPUT);
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}
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//gets called every time WiFi is (re-)connected. Initialize own network interfaces here
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void userConnected()
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{
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}
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void publishMqtt(float state)
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{
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//Check if MQTT Connected, otherwise it will crash the 8266
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if (mqtt != nullptr){
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char subuf[38];
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strcpy(subuf, mqttDeviceTopic);
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strcat(subuf, MQTT_TOPIC);
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mqtt->publish(subuf, 0, true, String(state).c_str());
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}
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}
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//loop. You can use "if (WLED_CONNECTED)" to check for successful connection
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void userLoop()
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{
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// Read only every 500ms, otherwise it causes the board to hang
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if (millis() - readTime > 500)
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{
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readTime = millis();
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timeDiff = millis() - lastTime;
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// Convert value to percentage
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lightValue = analogRead(LIGHT_PIN);
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lightPercentage = ((float)lightValue * -1 + 1024)/(float)1024 *100;
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// Send MQTT message on significant change or after UPDATE_MS
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if (abs(lightPercentage - lastPercentage) > CHANGE_THRESHOLD || timeDiff > UPDATE_MS)
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{
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publishMqtt(lightPercentage);
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lastTime = millis();
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lastPercentage = lightPercentage;
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}
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}
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}
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