bh1750

usermods/BH1750_v2/platformio_override.ini

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+; Options
+; -------
+; USERMOD_BH1750                                - define this to have this user mod included wled00\usermods_list.cpp
+; USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL       - the max number of milliseconds between measurements, defaults to 10000ms
+; USERMOD_BH1750_MIN_MEASUREMENT_INTERVAL       - the min number of milliseconds between measurements, defaults to 500ms
+; USERMOD_BH1750_FIRST_MEASUREMENT_AT           - the number of milliseconds after boot to take first measurement, defaults to 10 seconds
+; USERMOD_BH1750_OFFSET_VALUE                   - the offset value to report on, defaults to 1
+;
+[env:usermod_BH1750_d1_mini]
+extends = env:d1_mini
+build_flags =
+    ${common.build_flags_esp8266}
+    -D USERMOD_BH1750
+lib_deps = 
+    ${env.lib_deps}
+    claws/BH1750 @ ^1.2.0

usermods/BH1750_v2/readme.md

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+# BH1750 usermod
+
+This usermod will read from an ambient light sensor like the BH1750 sensor.
+The luminance is displayed both in the Info section of the web UI as well as published to the `/luminance` MQTT topic if enabled.
+
+## Installation
+
+Copy the example `platformio_override.ini` to the root directory.  This file should be placed in the same directory as `platformio.ini`.
+
+### Define Your Options
+
+* `USERMOD_BH1750`                                - define this to have this user mod included wled00\usermods_list.cpp
+* `USERMOD_BH1750_MAX_MEASUREMENT_INTERVAL`       - the max number of milliseconds between measurements, defaults to 10000ms
+* `USERMOD_BH1750_MIN_MEASUREMENT_INTERVAL`       - the min number of milliseconds between measurements, defaults to 500ms
+* `USERMOD_BH1750_FIRST_MEASUREMENT_AT`           - the number of milliseconds after boot to take first measurement, defaults to 10 seconds
+* `USERMOD_BH1750_OFFSET_VALUE`                   - the offset value to report on, defaults to 1
+
+All parameters can be configured at runtime using Usermods settings page.
+
+### PlatformIO requirements
+
+If you are using `platformio_override.ini`, you should be able to refresh the task list and see your custom task, for example `env:usermod_BH1750_d1_mini`.
+
+## Change Log

usermods/BH1750_v2/usermod_bh1750.h

@@ -0,0 +1,177 @@
+#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";

usermods/BH1750_v2/usermods_list.cpp

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+#include "wled.h"
+/*
+ * Register your v2 usermods here!
+ */
+#ifdef USERMOD_BH1750
+#include "../usermods/BH1750_v2/usermod_BH1750.h"
+#endif
+
+void registerUsermods()
+{
+#ifdef USERMOD_BH1750
+  usermods.add(new Usermod_BH1750());
+#endif
+}

wled00/const.h

@@ -60,6 +60,7 @@
 #define USERMOD_ID_SN_PHOTORESISTOR      17     //Usermod "usermod_sn_photoresistor.h"
 #define USERMOD_ID_BATTERY_STATUS_BASIC  18     //Usermod "usermod_v2_battery_status_basic.h"
 #define USERMOD_ID_PWM_FAN               19     //Usermod "usermod_PWM_fan.h"
+#define USERMOD_ID_BH1750                20     //Usermod "usermod_bh1750.h"
 
 //Access point behavior
 #define AP_BEHAVIOR_BOOT_NO_CONN          0     //Open AP when no connection after boot