WLED/usermods/BH1750_v2/usermod_bh1750.h
2021-10-08 02:11:39 +08:00

178 lines
5.2 KiB
C++

#pragma once
#include "wled.h"
#include <Wire.h>
#include <BH1750.h>
// the max frequency to check photoresistor, 10 seconds
#ifndef USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL
#define USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL 10000
#endif
// the min frequency to check photoresistor, 500 ms
#ifndef USERMOD_BH1750_MIN_MEASUREMENT_INTERVAL
#define USERMOD_BH1750_MIN_MEASUREMENT_INTERVAL 500
#endif
// how many seconds after boot to take first measurement, 10 seconds
#ifndef USERMOD_BH1750_FIRST_MEASUREMENT_AT
#define USERMOD_BH1750_FIRST_MEASUREMENT_AT 10000
#endif
// only report if differance grater than offset value
#ifndef USERMOD_BH1750_OFFSET_VALUE
#define USERMOD_BH1750_OFFSET_VALUE 1
#endif
class Usermod_BH1750 : public Usermod
{
private:
int8_t offset = USERMOD_BH1750_OFFSET_VALUE;
unsigned long maxReadingInterval = USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL;
unsigned long minReadingInterval = USERMOD_BH1750_MIN_MEASUREMENT_INTERVAL;
unsigned long lastMeasurement = UINT32_MAX - (USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL - USERMOD_BH1750_FIRST_MEASUREMENT_AT);
unsigned long lastSend = UINT32_MAX - (USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL - USERMOD_BH1750_FIRST_MEASUREMENT_AT);
// flag to indicate we have finished the first readLightLevel call
// allows this library to report to the user how long until the first
// measurement
bool getLuminanceComplete = false;
// flag set at startup
bool disabled = false;
// strings to reduce flash memory usage (used more than twice)
static const char _name[];
static const char _enabled[];
static const char _maxReadInterval[];
static const char _minReadInterval[];
static const char _offset[];
BH1750 lightMeter;
float lastLux = -1000;
bool checkBoundSensor(float newValue, float prevValue, float maxDiff)
{
return isnan(prevValue) || newValue <= prevValue - maxDiff || newValue >= prevValue + maxDiff || (newValue == 0.0 && prevValue > 0.0);
}
public:
void setup()
{
Wire.begin();
lightMeter.begin();
}
void loop()
{
if (disabled || strip.isUpdating())
return;
unsigned long now = millis();
// check to see if we are due for taking a measurement
// lastMeasurement will not be updated until the conversion
// is complete the the reading is finished
if (now - lastMeasurement < minReadingInterval)
{
return;
}
bool shouldUpdate = now - lastSend > maxReadingInterval;
float lux = lightMeter.readLightLevel();
lastMeasurement = millis();
getLuminanceComplete = true;
if (shouldUpdate || checkBoundSensor(lux, lastLux, offset))
{
lastLux = lux;
lastSend = millis();
if (WLED_MQTT_CONNECTED)
{
char subuf[45];
strcpy(subuf, mqttDeviceTopic);
strcat_P(subuf, PSTR("/luminance"));
mqtt->publish(subuf, 0, true, String(lux).c_str());
}
else
{
DEBUG_PRINTLN("Missing MQTT connection. Not publishing data");
}
}
}
void addToJsonInfo(JsonObject &root)
{
JsonObject user = root[F("u")];
if (user.isNull())
user = root.createNestedObject(F("u"));
JsonArray lux_json = user.createNestedArray(F("Luminance"));
if (!getLuminanceComplete)
{
// if we haven't read the sensor yet, let the user know
// that we are still waiting for the first measurement
lux_json.add((USERMOD_BH1750_FIRST_MEASUREMENT_AT - millis()) / 1000);
lux_json.add(F(" sec until read"));
return;
}
lux_json.add(lastLux);
lux_json.add(F(" lx"));
}
uint16_t getId()
{
return USERMOD_ID_BH1750;
}
/**
* addToConfig() (called from set.cpp) stores persistent properties to cfg.json
*/
void addToConfig(JsonObject &root)
{
// we add JSON object.
JsonObject top = root.createNestedObject(FPSTR(_name)); // usermodname
top[FPSTR(_enabled)] = !disabled;
top[FPSTR(_maxReadInterval)] = maxReadingInterval;
top[FPSTR(_minReadInterval)] = minReadingInterval;
top[FPSTR(_offset)] = offset;
DEBUG_PRINTLN(F("Photoresistor config saved."));
}
/**
* readFromConfig() is called before setup() to populate properties from values stored in cfg.json
*/
bool readFromConfig(JsonObject &root)
{
// we look for JSON object.
JsonObject top = root[FPSTR(_name)];
if (top.isNull())
{
DEBUG_PRINT(FPSTR(_name));
DEBUG_PRINTLN(F(": No config found. (Using defaults.)"));
return false;
}
disabled = !(top[FPSTR(_enabled)] | !disabled);
maxReadingInterval = (top[FPSTR(_maxReadInterval)] | maxReadingInterval); // ms
minReadingInterval = (top[FPSTR(_minReadInterval)] | minReadingInterval); // ms
offset = top[FPSTR(_offset)] | offset;
DEBUG_PRINT(FPSTR(_name));
DEBUG_PRINTLN(F(" config (re)loaded."));
// use "return !top["newestParameter"].isNull();" when updating Usermod with new features
return true;
}
};
// strings to reduce flash memory usage (used more than twice)
const char Usermod_BH1750::_name[] PROGMEM = "BH1750";
const char Usermod_BH1750::_enabled[] PROGMEM = "enabled";
const char Usermod_BH1750::_maxReadInterval[] PROGMEM = "max-read-interval-ms";
const char Usermod_BH1750::_minReadInterval[] PROGMEM = "min-read-interval-ms";
const char Usermod_BH1750::_offset[] PROGMEM = "offset-lx";