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WLED/usermods/BME280_v2/usermod_bme280.h
Blaz Kristan 82e448de7c Beta-3 changes 
- remove I2C init  from usermods
- PCF8574 (&co) port expander support
- refactor PIR &  Rotary encoder & 4LD
- reboot race condition
- optimisations
2023-05-30 19:36:14 +02:00

458 lines
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// force the compiler to show a warning to confirm that this file is included
#warning **** Included USERMOD_BME280 version 2.0 ****
#ifndef WLED_ENABLE_MQTT
#error "This user mod requires MQTT to be enabled."
#endif
#pragma once
#include "wled.h"
#include <Arduino.h>
#include <BME280I2C.h> // BME280 sensor
#include <EnvironmentCalculations.h> // BME280 extended measurements
class UsermodBME280 : public Usermod
{
private:
// NOTE: Do not implement any compile-time variables, anything the user needs to configure
// should be configurable from the Usermod menu using the methods below
// key settings set via usermod menu
uint8_t TemperatureDecimals = 0; // Number of decimal places in published temperaure values
uint8_t HumidityDecimals = 0; // Number of decimal places in published humidity values
uint8_t PressureDecimals = 0; // Number of decimal places in published pressure values
uint16_t TemperatureInterval = 5; // Interval to measure temperature (and humidity, dew point if available) in seconds
uint16_t PressureInterval = 300; // Interval to measure pressure in seconds
bool PublishAlways = false; // Publish values even when they have not changed
bool UseCelsius = true; // Use Celsius for Reporting
bool HomeAssistantDiscovery = false; // Publish Home Assistant Device Information
bool enabled = true;
// set the default pins based on the architecture, these get overridden by Usermod menu settings
#ifdef ESP8266
//uint8_t RST_PIN = 16; // Uncoment for Heltec WiFi-Kit-8
#endif
bool initDone = false;
// BME280 sensor settings
BME280I2C::Settings settings{
BME280::OSR_X16, // Temperature oversampling x16
BME280::OSR_X16, // Humidity oversampling x16
BME280::OSR_X16, // Pressure oversampling x16
// Defaults
BME280::Mode_Forced,
BME280::StandbyTime_1000ms,
BME280::Filter_Off,
BME280::SpiEnable_False,
BME280I2C::I2CAddr_0x76 // I2C address. I2C specific. Default 0x76
};
BME280I2C bme{settings};
uint8_t sensorType;
// Measurement timers
long timer;
long lastTemperatureMeasure = 0;
long lastPressureMeasure = 0;
// Current sensor values
float sensorTemperature;
float sensorHumidity;
float sensorHeatIndex;
float sensorDewPoint;
float sensorPressure;
String tempScale;
// Track previous sensor values
float lastTemperature;
float lastHumidity;
float lastHeatIndex;
float lastDewPoint;
float lastPressure;
// MQTT topic strings for publishing Home Assistant discovery topics
bool mqttInitialized = false;
// strings to reduce flash memory usage (used more than twice)
static const char _name[];
static const char _enabled[];
// Read the BME280/BMP280 Sensor (which one runs depends on whether Celsius or Farenheit being set in Usermod Menu)
void UpdateBME280Data(int SensorType)
{
float _temperature, _humidity, _pressure;
if (UseCelsius) {
BME280::TempUnit tempUnit(BME280::TempUnit_Celsius);
EnvironmentCalculations::TempUnit envTempUnit(EnvironmentCalculations::TempUnit_Celsius);
BME280::PresUnit presUnit(BME280::PresUnit_hPa);
bme.read(_pressure, _temperature, _humidity, tempUnit, presUnit);
sensorTemperature = _temperature;
sensorHumidity = _humidity;
sensorPressure = _pressure;
tempScale = F("°C");
if (sensorType == 1)
{
sensorHeatIndex = EnvironmentCalculations::HeatIndex(_temperature, _humidity, envTempUnit);
sensorDewPoint = EnvironmentCalculations::DewPoint(_temperature, _humidity, envTempUnit);
}
} else {
BME280::TempUnit tempUnit(BME280::TempUnit_Fahrenheit);
EnvironmentCalculations::TempUnit envTempUnit(EnvironmentCalculations::TempUnit_Fahrenheit);
BME280::PresUnit presUnit(BME280::PresUnit_hPa);
bme.read(_pressure, _temperature, _humidity, tempUnit, presUnit);
sensorTemperature = _temperature;
sensorHumidity = _humidity;
sensorPressure = _pressure;
tempScale = F("°F");
if (sensorType == 1)
{
sensorHeatIndex = EnvironmentCalculations::HeatIndex(_temperature, _humidity, envTempUnit);
sensorDewPoint = EnvironmentCalculations::DewPoint(_temperature, _humidity, envTempUnit);
}
}
}
// Procedure to define all MQTT discovery Topics
void _mqttInitialize()
{
char mqttTemperatureTopic[128];
char mqttHumidityTopic[128];
char mqttPressureTopic[128];
char mqttHeatIndexTopic[128];
char mqttDewPointTopic[128];
snprintf_P(mqttTemperatureTopic, 127, PSTR("%s/temperature"), mqttDeviceTopic);
snprintf_P(mqttPressureTopic, 127, PSTR("%s/pressure"), mqttDeviceTopic);
snprintf_P(mqttHumidityTopic, 127, PSTR("%s/humidity"), mqttDeviceTopic);
snprintf_P(mqttHeatIndexTopic, 127, PSTR("%s/heat_index"), mqttDeviceTopic);
snprintf_P(mqttDewPointTopic, 127, PSTR("%s/dew_point"), mqttDeviceTopic);
if (HomeAssistantDiscovery) {
_createMqttSensor(F("Temperature"), mqttTemperatureTopic, "temperature", tempScale);
_createMqttSensor(F("Pressure"), mqttPressureTopic, "pressure", F("hPa"));
_createMqttSensor(F("Humidity"), mqttHumidityTopic, "humidity", F("%"));
_createMqttSensor(F("HeatIndex"), mqttHeatIndexTopic, "temperature", tempScale);
_createMqttSensor(F("DewPoint"), mqttDewPointTopic, "temperature", tempScale);
}
}
// Create an MQTT Sensor for Home Assistant Discovery purposes, this includes a pointer to the topic that is published to in the Loop.
void _createMqttSensor(const String &name, const String &topic, const String &deviceClass, const String &unitOfMeasurement)
{
String t = String(F("homeassistant/sensor/")) + mqttClientID + F("/") + name + F("/config");
StaticJsonDocument<600> doc;
doc[F("name")] = String(serverDescription) + " " + name;
doc[F("state_topic")] = topic;
doc[F("unique_id")] = String(mqttClientID) + name;
if (unitOfMeasurement != "")
doc[F("unit_of_measurement")] = unitOfMeasurement;
if (deviceClass != "")
doc[F("device_class")] = deviceClass;
doc[F("expire_after")] = 1800;
JsonObject device = doc.createNestedObject(F("device")); // attach the sensor to the same device
device[F("name")] = serverDescription;
device[F("identifiers")] = "wled-sensor-" + String(mqttClientID);
device[F("manufacturer")] = F("WLED");
device[F("model")] = F("FOSS");
device[F("sw_version")] = versionString;
String temp;
serializeJson(doc, temp);
DEBUG_PRINTLN(t);
DEBUG_PRINTLN(temp);
mqtt->publish(t.c_str(), 0, true, temp.c_str());
}
void publishMqtt(const char *topic, const char* state) {
//Check if MQTT Connected, otherwise it will crash the 8266
if (WLED_MQTT_CONNECTED){
char subuf[128];
snprintf_P(subuf, 127, PSTR("%s/%s"), mqttDeviceTopic, topic);
mqtt->publish(subuf, 0, false, state);
}
}
public:
void setup()
{
PinManagerPinType pins[2] = { { i2c_sda, true }, { i2c_scl, true } }; // allocate pins
if (!pinManager.allocateMultiplePins(pins, 2, PinOwner::HW_I2C)) { sensorType=0; return; }
if (!bme.begin())
{
sensorType = 0;
DEBUG_PRINTLN(F("Could not find BME280 I2C sensor!"));
}
else
{
switch (bme.chipModel())
{
case BME280::ChipModel_BME280:
sensorType = 1;
DEBUG_PRINTLN(F("Found BME280 sensor! Success."));
break;
case BME280::ChipModel_BMP280:
sensorType = 2;
DEBUG_PRINTLN(F("Found BMP280 sensor! No Humidity available."));
break;
default:
sensorType = 0;
DEBUG_PRINTLN(F("Found UNKNOWN sensor! Error!"));
}
}
initDone=true;
}
void loop()
{
if (!enabled || strip.isUpdating()) return;
// BME280 sensor MQTT publishing
// Check if sensor present and Connected, otherwise it will crash the MCU
if (sensorType != 0)
{
// Timer to fetch new temperature, humidity and pressure data at intervals
timer = millis();
if (timer - lastTemperatureMeasure >= TemperatureInterval * 1000)
{
lastTemperatureMeasure = timer;
UpdateBME280Data(sensorType);
float temperature = roundf(sensorTemperature * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
float humidity, heatIndex, dewPoint;
// If temperature has changed since last measure, create string populated with device topic
// from the UI and values read from sensor, then publish to broker
if (temperature != lastTemperature || PublishAlways)
{
publishMqtt("temperature", String(temperature, TemperatureDecimals).c_str());
}
lastTemperature = temperature; // Update last sensor temperature for next loop
if (sensorType == 1) // Only if sensor is a BME280
{
humidity = roundf(sensorHumidity * powf(10, HumidityDecimals)) / powf(10, HumidityDecimals);
heatIndex = roundf(sensorHeatIndex * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
dewPoint = roundf(sensorDewPoint * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
if (humidity != lastHumidity || PublishAlways)
{
publishMqtt("humidity", String(humidity, HumidityDecimals).c_str());
}
if (heatIndex != lastHeatIndex || PublishAlways)
{
publishMqtt("heat_index", String(heatIndex, TemperatureDecimals).c_str());
}
if (dewPoint != lastDewPoint || PublishAlways)
{
publishMqtt("dew_point", String(dewPoint, TemperatureDecimals).c_str());
}
lastHumidity = humidity;
lastHeatIndex = heatIndex;
lastDewPoint = dewPoint;
}
}
if (timer - lastPressureMeasure >= PressureInterval * 1000)
{
lastPressureMeasure = timer;
float pressure = roundf(sensorPressure * powf(10, PressureDecimals)) / powf(10, PressureDecimals);
if (pressure != lastPressure || PublishAlways)
{
publishMqtt("pressure", String(pressure, PressureDecimals).c_str());
}
lastPressure = pressure;
}
}
}
void onMqttConnect(bool sessionPresent)
{
if (WLED_MQTT_CONNECTED && !mqttInitialized)
{
_mqttInitialize();
mqttInitialized = true;
}
}
/*
* API calls te enable data exchange between WLED modules
*/
inline float getTemperatureC() {
if (UseCelsius) {
return (float)roundf(sensorTemperature * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
} else {
return (float)roundf(sensorTemperature * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals) * 1.8f + 32;
}
}
inline float getTemperatureF() {
if (UseCelsius) {
return ((float)roundf(sensorTemperature * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals) -32) * 0.56f;
} else {
return (float)roundf(sensorTemperature * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
}
}
inline float getHumidity() {
return (float)roundf(sensorHumidity * powf(10, HumidityDecimals));
}
inline float getPressure() {
return (float)roundf(sensorPressure * powf(10, PressureDecimals));
}
inline float getDewPointC() {
if (UseCelsius) {
return (float)roundf(sensorDewPoint * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
} else {
return (float)roundf(sensorDewPoint * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals) * 1.8f + 32;
}
}
inline float getDewPointF() {
if (UseCelsius) {
return ((float)roundf(sensorDewPoint * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals) -32) * 0.56f;
} else {
return (float)roundf(sensorDewPoint * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
}
}
inline float getHeatIndexC() {
if (UseCelsius) {
return (float)roundf(sensorHeatIndex * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
} else {
return (float)roundf(sensorHeatIndex * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals) * 1.8f + 32;
}
}
inline float getHeatIndexF() {
if (UseCelsius) {
return ((float)roundf(sensorHeatIndex * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals) -32) * 0.56f;
} else {
return (float)roundf(sensorHeatIndex * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals);
}
}
// Publish Sensor Information to Info Page
void addToJsonInfo(JsonObject &root)
{
JsonObject user = root[F("u")];
if (user.isNull()) user = root.createNestedObject(F("u"));
if (sensorType==0) //No Sensor
{
// if we sensor not detected, let the user know
JsonArray temperature_json = user.createNestedArray(F("BME/BMP280 Sensor"));
temperature_json.add(F("Not Found"));
}
else if (sensorType==2) //BMP280
{
JsonArray temperature_json = user.createNestedArray(F("Temperature"));
JsonArray pressure_json = user.createNestedArray(F("Pressure"));
temperature_json.add(roundf(sensorTemperature * powf(10, TemperatureDecimals)));
temperature_json.add(tempScale);
pressure_json.add(roundf(sensorPressure * powf(10, PressureDecimals)));
pressure_json.add(F("hPa"));
}
else if (sensorType==1) //BME280
{
JsonArray temperature_json = user.createNestedArray(F("Temperature"));
JsonArray humidity_json = user.createNestedArray(F("Humidity"));
JsonArray pressure_json = user.createNestedArray(F("Pressure"));
JsonArray heatindex_json = user.createNestedArray(F("Heat Index"));
JsonArray dewpoint_json = user.createNestedArray(F("Dew Point"));
temperature_json.add(roundf(sensorTemperature * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals));
temperature_json.add(tempScale);
humidity_json.add(roundf(sensorHumidity * powf(10, HumidityDecimals)));
humidity_json.add(F("%"));
pressure_json.add(roundf(sensorPressure * powf(10, PressureDecimals)));
pressure_json.add(F("hPa"));
heatindex_json.add(roundf(sensorHeatIndex * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals));
heatindex_json.add(tempScale);
dewpoint_json.add(roundf(sensorDewPoint * powf(10, TemperatureDecimals)) / powf(10, TemperatureDecimals));
dewpoint_json.add(tempScale);
}
return;
}
// Save Usermod Config Settings
void addToConfig(JsonObject& root)
{
JsonObject top = root.createNestedObject(FPSTR(_name));
top[FPSTR(_enabled)] = enabled;
top[F("TemperatureDecimals")] = TemperatureDecimals;
top[F("HumidityDecimals")] = HumidityDecimals;
top[F("PressureDecimals")] = PressureDecimals;
top[F("TemperatureInterval")] = TemperatureInterval;
top[F("PressureInterval")] = PressureInterval;
top[F("PublishAlways")] = PublishAlways;
top[F("UseCelsius")] = UseCelsius;
top[F("HomeAssistantDiscovery")] = HomeAssistantDiscovery;
DEBUG_PRINTLN(F("BME280 config saved."));
}
// Read Usermod Config Settings
bool readFromConfig(JsonObject& root)
{
// default settings values could be set here (or below using the 3-argument getJsonValue()) instead of in the class definition or constructor
// setting them inside readFromConfig() is slightly more robust, handling the rare but plausible use case of single value being missing after boot (e.g. if the cfg.json was manually edited and a value was removed)
JsonObject top = root[FPSTR(_name)];
if (top.isNull()) {
DEBUG_PRINT(F(_name));
DEBUG_PRINTLN(F(": No config found. (Using defaults.)"));
return false;
}
bool configComplete = !top.isNull();
configComplete &= getJsonValue(top[FPSTR(_enabled)], enabled);
// A 3-argument getJsonValue() assigns the 3rd argument as a default value if the Json value is missing
configComplete &= getJsonValue(top[F("TemperatureDecimals")], TemperatureDecimals, 1);
configComplete &= getJsonValue(top[F("HumidityDecimals")], HumidityDecimals, 0);
configComplete &= getJsonValue(top[F("PressureDecimals")], PressureDecimals, 0);
configComplete &= getJsonValue(top[F("TemperatureInterval")], TemperatureInterval, 30);
configComplete &= getJsonValue(top[F("PressureInterval")], PressureInterval, 30);
configComplete &= getJsonValue(top[F("PublishAlways")], PublishAlways, false);
configComplete &= getJsonValue(top[F("UseCelsius")], UseCelsius, true);
configComplete &= getJsonValue(top[F("HomeAssistantDiscovery")], HomeAssistantDiscovery, false);
DEBUG_PRINT(FPSTR(_name));
if (!initDone) {
// first run: reading from cfg.json
DEBUG_PRINTLN(F(" config loaded."));
} else {
DEBUG_PRINTLN(F(" config (re)loaded."));
// changing parameters from settings page
}
return configComplete;
}
uint16_t getId() {
return USERMOD_ID_BME280;
}
};
const char UsermodBME280::_name[] PROGMEM = "BME280/BMP280";
const char UsermodBME280::_enabled[] PROGMEM = "enabled";
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