Sketch problems.... I think
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I am trying to create a outdoor weather station which runs on batterys.
I am having issues with the light level readings.... they were working fine now all of a sudden they arent.
I am pretty sure that it is an issue with my sketch but i cant find any problems?? Am i missing something??/** * The MySensors Arduino library handles the wireless radio link and protocol * between your home built sensors/actuators and HA controller of choice. * The sensors forms a self healing radio network with optional repeaters. Each * repeater and gateway builds a routing tables in EEPROM which keeps track of the * network topology allowing messages to be routed to nodes. * * Created by Henrik Ekblad <henrik.ekblad@mysensors.org> * Copyright (C) 2013-2015 Sensnology AB * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors * * Documentation: http://www.mysensors.org * Support Forum: http://forum.mysensors.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * ******************************* * * REVISION HISTORY * Version 1.0 - Henrik Ekblad * * DESCRIPTION * Pressure sensor example using BMP085 module * http://www.mysensors.org/build/pressure * */ // Enable debug prints to serial monitor #define MY_DEBUG // Enable and select radio type attached #define MY_RADIO_NRF24 //#define MY_RADIO_RFM69 #define MY_NODE_ID 5 #include <SPI.h> #include <MySensors.h> #include <Wire.h> #include <Adafruit_BMP085.h> #include <DHT.h> #define DHT_DATA_PIN 2 #define LIGHT_SENSOR_ANALOG_PIN 1 #define LUX_ON 5 #define POWER_ON 1 // value to write to turn on sensor #define POWER_OFF 0 // value to write to turn off sensor #define BARO_CHILD 0 #define TEMP_CHILD 1 #define VOLTAGE_CHILD_ID 3 #define CHILD_ID_HUM 4 #define CHILD_ID_LIGHT 5 static const uint64_t UPDATE_INTERVAL = 30000; static const uint8_t FORCE_UPDATE_N_READS = 10; int BATTERY_SENSE_PIN = A0; // select the input pin for the battery sense point int oldBatteryPcnt = 0; const float ALTITUDE = 59; // <-- adapt this value to your own location's altitude. // Sleep time between reads (in seconds). Do not change this value as the forecast algorithm needs a sample every minute. const unsigned long SLEEP_TIME = 60000; const char *weather[] = { "stable", "sunny", "cloudy", "unstable", "thunderstorm", "unknown" }; enum FORECAST { STABLE = 0, // "Stable Weather Pattern" SUNNY = 1, // "Slowly rising Good Weather", "Clear/Sunny " CLOUDY = 2, // "Slowly falling L-Pressure ", "Cloudy/Rain " UNSTABLE = 3, // "Quickly rising H-Press", "Not Stable" THUNDERSTORM = 4, // "Quickly falling L-Press", "Thunderstorm" UNKNOWN = 5 // "Unknown (More Time needed) }; Adafruit_BMP085 bmp = Adafruit_BMP085(); // Digital Pressure Sensor float lastPressure = -1; float lastTemp = -1; int lastForecast = -1; //float lastTemp; float lastHum; uint8_t nNoUpdatesTemp; uint8_t nNoUpdatesHum; //bool metric = true; const int LAST_SAMPLES_COUNT = 5; float lastPressureSamples[LAST_SAMPLES_COUNT]; // this CONVERSION_FACTOR is used to convert from Pa to kPa in forecast algorithm // get kPa/h be dividing hPa by 10 #define CONVERSION_FACTOR (1.0/10.0) int minuteCount = 0; bool firstRound = true; // average value is used in forecast algorithm. float pressureAvg; // average after 2 hours is used as reference value for the next iteration. float pressureAvg2; float dP_dt; bool metric; MyMessage tempMsg(TEMP_CHILD, V_TEMP); MyMessage pressureMsg(BARO_CHILD, V_PRESSURE); MyMessage forecastMsg(BARO_CHILD, V_FORECAST); MyMessage voltageMsg(VOLTAGE_CHILD_ID, V_VOLTAGE); MyMessage msgHum(CHILD_ID_HUM, V_HUM); DHT dht; MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL); int lastLightLevel; void setup() { //Serial.println("Setting Pin Mode to Output"); //pinMode(LUX_ON, OUTPUT); Serial.println("Setup Sensor"); dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) { Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!"); } // Sleep for the time of the minimum sampling period to give the sensor time to power up // (otherwise, timeout errors might occure for the first reading) sleep(dht.getMinimumSamplingPeriod()); { // use the 1.1 V internal reference #if defined(__AVR_ATmega2560__) analogReference(INTERNAL1V1); #else analogReference(INTERNAL); #endif } if (!bmp.begin()) { Serial.println("Could not find a valid BMP085 sensor, check wiring!"); while (1) {} } metric = getConfig().isMetric; } void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("Pressure Sensor", "1.1"); Serial.println("Present sensors to gateway"); // Register sensors to gw (they will be created as child devices) present(BARO_CHILD, S_BARO); present(TEMP_CHILD, S_TEMP); present(VOLTAGE_CHILD_ID, S_MULTIMETER, "Battery " ); present(CHILD_ID_HUM, S_HUM); present(CHILD_ID_LIGHT, S_LIGHT_LEVEL); // metric = getConfig().isMetric; } void loop() { int16_t lightLevel = (1023-analogRead(LIGHT_SENSOR_ANALOG_PIN))/10.23; Serial.println("LUX:"); Serial.println(lightLevel); if (lightLevel != lastLightLevel) { send(msg.set(lightLevel)); lastLightLevel = lightLevel; } sleep(5000); Serial.println("Humidity"); // Force reading sensor, so it works also after sleep() dht.readSensor(true); // Get humidity from DHT library float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) { // Only send humidity if it changed since the last measurement or if we didn't send an update for n times lastHum = humidity; // Reset no updates counter nNoUpdatesHum = 0; send(msgHum.set(humidity, 1)); #ifdef MY_DEBUG Serial.print("H: "); Serial.println(humidity); #endif } else { // Increase no update counter if the humidity stayed the same nNoUpdatesHum++; } // Sleep for a while to save energy //sleep(UPDATE_INTERVAL); { // get the battery Voltage int sensorValue = analogRead(BATTERY_SENSE_PIN); #ifdef MY_DEBUG Serial.println(sensorValue); #endif // 1M, 470K divider across battery and using internal ADC ref of 1.1V // Sense point is bypassed with 0.1 uF cap to reduce noise at that point // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts // 3.44/1023 = Volts per bit = 0.003363075 int batteryPcnt = sensorValue / 10; #ifdef MY_DEBUG float batteryV = sensorValue * 0.003363075; float voltage = sensorValue * 0.003363075; Serial.print("Battery Voltage: "); Serial.print(batteryV); Serial.println(" V"); Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %"); #endif if (oldBatteryPcnt != batteryPcnt) { // Power up radio after sleep sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; send(voltageMsg.set(voltage,2)); } // sleep(SLEEP_TIME); } float pressure = bmp.readSealevelPressure(ALTITUDE) / 100.0; float temperature = bmp.readTemperature(); if (!metric) { // Convert to fahrenheit temperature = temperature * 9.0 / 5.0 + 32.0; } int forecast = sample(pressure); Serial.print("Temperature = "); Serial.print(temperature); Serial.println(metric ? " *C" : " *F"); Serial.print("Pressure = "); Serial.print(pressure); Serial.println(" hPa"); Serial.print("Forecast = "); Serial.println(weather[forecast]); if (temperature != lastTemp) { send(tempMsg.set(temperature, 1)); lastTemp = temperature; } if (pressure != lastPressure) { send(pressureMsg.set(pressure, 0)); lastPressure = pressure; } if (forecast != lastForecast) { send(forecastMsg.set(weather[forecast])); lastForecast = forecast; } sleep(SLEEP_TIME); } float getLastPressureSamplesAverage() { float lastPressureSamplesAverage = 0; for (int i = 0; i < LAST_SAMPLES_COUNT; i++) { lastPressureSamplesAverage += lastPressureSamples[i]; } lastPressureSamplesAverage /= LAST_SAMPLES_COUNT; return lastPressureSamplesAverage; } // Algorithm found here // http://www.freescale.com/files/sensors/doc/app_note/AN3914.pdf // Pressure in hPa --> forecast done by calculating kPa/h int sample(float pressure) { // Calculate the average of the last n minutes. int index = minuteCount % LAST_SAMPLES_COUNT; lastPressureSamples[index] = pressure; minuteCount++; if (minuteCount > 185) { minuteCount = 6; } if (minuteCount == 5) { pressureAvg = getLastPressureSamplesAverage(); } else if (minuteCount == 35) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change * 2; // note this is for t = 0.5hour } else { dP_dt = change / 1.5; // divide by 1.5 as this is the difference in time from 0 value. } } else if (minuteCount == 65) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) //first time initial 3 hour { dP_dt = change; //note this is for t = 1 hour } else { dP_dt = change / 2; //divide by 2 as this is the difference in time from 0 value } } else if (minuteCount == 95) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 1.5; // note this is for t = 1.5 hour } else { dP_dt = change / 2.5; // divide by 2.5 as this is the difference in time from 0 value } } else if (minuteCount == 125) { float lastPressureAvg = getLastPressureSamplesAverage(); pressureAvg2 = lastPressureAvg; // store for later use. float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 2; // note this is for t = 2 hour } else { dP_dt = change / 3; // divide by 3 as this is the difference in time from 0 value } } else if (minuteCount == 155) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 2.5; // note this is for t = 2.5 hour } else { dP_dt = change / 3.5; // divide by 3.5 as this is the difference in time from 0 value } } else if (minuteCount == 185) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 3; // note this is for t = 3 hour } else { dP_dt = change / 4; // divide by 4 as this is the difference in time from 0 value } pressureAvg = pressureAvg2; // Equating the pressure at 0 to the pressure at 2 hour after 3 hours have past. firstRound = false; // flag to let you know that this is on the past 3 hour mark. Initialized to 0 outside main loop. } int forecast = UNKNOWN; if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval. { forecast = UNKNOWN; } else if (dP_dt < (-0.25)) { forecast = THUNDERSTORM; } else if (dP_dt > 0.25) { forecast = UNSTABLE; } else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05))) { forecast = CLOUDY; } else if ((dP_dt > 0.05) && (dP_dt < 0.25)) { forecast = SUNNY; } else if ((dP_dt >(-0.05)) && (dP_dt < 0.05)) { forecast = STABLE; } else { forecast = UNKNOWN; } // uncomment when debugging Serial.print(F("Forecast at minute ")); Serial.print(minuteCount); Serial.print(F(" dP/dt = ")); Serial.print(dP_dt); Serial.print(F("kPa/h --> ")); Serial.println(weather[forecast]); return forecast; }EDIT: ignore the commented out sections.. i was playing around with powering the sensor off an arduino pin so try and save on power
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I dont know what controller you are using but I had similar problems with domoticz when presenting s_light_level and V_Level vs v_light_level. It had to do with domoticz update.
Thats what came to mind. I didnt find a sketch problem if this wasn't part of your problem.
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Turns out i had a bad battery...... Must of shorted internally and was causing my arduino to go crazy
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Node is up and running and reporting perfectly. Power consumption is approx 220uA.
Reporting temp, humidity, light level , barometer, forecast and battery level.
Here is the code if anyone wants................../** OUTDOOR WEATHER STATION SKETCH TEMP AND PRESSURE VIA BMP180 HUMIDITY VIA DHT22 LIGHT SENSOR VIA LM393 SOIL MOISTURE VIA SOIL MOISTURE SENSOR CREATED BY J.H 4.3.2020 REV 2 * */ // Enable debug prints to serial monitor #define MY_DEBUG // Enable and select radio type attached #define MY_RADIO_NRF24 // Define Node ID #define MY_NODE_ID 5 // Includes #include <SPI.h> #include <MySensors.h> #include <Wire.h> #include <Adafruit_BMP085.h> #include <DHT.h> // Pin Defines #define DHT_DATA_PIN 2 #define LIGHT_SENSOR_ANALOG_PIN 1 #define LUX_ON 5 // Defines #define POWER_ON 1 // value to write to turn on sensor #define POWER_OFF 0 // value to write to turn off sensor #define BARO_CHILD 0 #define TEMP_CHILD 1 #define VOLTAGE_CHILD_ID 3 #define CHILD_ID_HUM 4 #define CHILD_ID_LIGHT 5 static const uint64_t UPDATE_INTERVAL = 30000; static const uint8_t FORCE_UPDATE_N_READS = 10; int BATTERY_SENSE_PIN = A0; // select the input pin for the battery sense point int oldBatteryPcnt = 0; const float ALTITUDE = 59; // <-- adapt this value to your own location's altitude. // Sleep time between reads (in seconds). Do not change this value as the forecast algorithm needs a sample every minute. const unsigned long SLEEP_TIME = 60000; const char *weather[] = { "stable", "sunny", "cloudy", "unstable", "thunderstorm", "unknown" }; enum FORECAST { STABLE = 0, // "Stable Weather Pattern" SUNNY = 1, // "Slowly rising Good Weather", "Clear/Sunny " CLOUDY = 2, // "Slowly falling L-Pressure ", "Cloudy/Rain " UNSTABLE = 3, // "Quickly rising H-Press", "Not Stable" THUNDERSTORM = 4, // "Quickly falling L-Press", "Thunderstorm" UNKNOWN = 5 // "Unknown (More Time needed) }; Adafruit_BMP085 bmp = Adafruit_BMP085(); // Digital Pressure Sensor float lastPressure = -1; float lastTemp = -1; int lastForecast = -1; //float lastTemp; float lastHum; uint8_t nNoUpdatesTemp; uint8_t nNoUpdatesHum; //bool metric = true; const int LAST_SAMPLES_COUNT = 5; float lastPressureSamples[LAST_SAMPLES_COUNT]; // this CONVERSION_FACTOR is used to convert from Pa to kPa in forecast algorithm // get kPa/h be dividing hPa by 10 #define CONVERSION_FACTOR (1.0/10.0) int minuteCount = 0; bool firstRound = true; // average value is used in forecast algorithm. float pressureAvg; // average after 2 hours is used as reference value for the next iteration. float pressureAvg2; float dP_dt; bool metric; MyMessage tempMsg(TEMP_CHILD, V_TEMP); MyMessage pressureMsg(BARO_CHILD, V_PRESSURE); MyMessage forecastMsg(BARO_CHILD, V_FORECAST); MyMessage voltageMsg(VOLTAGE_CHILD_ID, V_VOLTAGE); MyMessage msgHum(CHILD_ID_HUM, V_HUM); DHT dht; MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL); int lastLightLevel; void setup() { //Serial.println("Setting Pin Mode to Output"); //pinMode(LUX_ON, OUTPUT); Serial.println("Setup Sensor"); dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) { Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!"); } // Sleep for the time of the minimum sampling period to give the sensor time to power up // (otherwise, timeout errors might occure for the first reading) sleep(dht.getMinimumSamplingPeriod()); { // use the 1.1 V internal reference #if defined(__AVR_ATmega2560__) analogReference(INTERNAL1V1); #else analogReference(INTERNAL); #endif } if (!bmp.begin()) { Serial.println("Could not find a valid BMP085 sensor, check wiring!"); while (1) {} } metric = getConfig().isMetric; } void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("Pressure Sensor", "1.1"); Serial.println("Present sensors to gateway"); // Register sensors to gw (they will be created as child devices) present(BARO_CHILD, S_BARO, "Pressure" ); present(TEMP_CHILD, S_TEMP, "Temperature" ); present(VOLTAGE_CHILD_ID, S_MULTIMETER, "Battery" ); present(CHILD_ID_HUM, S_HUM, "Humidity" ); present(CHILD_ID_LIGHT, S_LIGHT_LEVEL, "Lux" ); // metric = getConfig().isMetric; } void loop() { //////////////////////////////////////// ////////// Lux Sensor Code ///////////// //////////////////////////////////////// digitalWrite(LUX_ON, POWER_ON); // Power the Lux sensor of Digital Pin to save power Serial.print("Sensor Power on pin "); Serial.print(LUX_ON); Serial.print(" is..."); Serial.println((POWER_ON)); wait(1000); // Wait a second for sensor to power up before reading int16_t lightLevel = (1023-analogRead(LIGHT_SENSOR_ANALOG_PIN))/10.23; Serial.println("Light Lux Level:"); Serial.println(lightLevel); if (lightLevel != lastLightLevel) { send(msg.set(lightLevel)); lastLightLevel = lightLevel; digitalWrite(LUX_ON, POWER_OFF); // turn it off Serial.print("Sensor Power on pin "); Serial.print(LUX_ON); Serial.print(" is..."); Serial.println((POWER_OFF)); } wait(1000); //////////////////////////////////////// ////////// DHT22 Sensor Code /////////// //////////////////////////////////////// // Force reading sensor, so it works also after sleep() dht.readSensor(true); // Get humidity from DHT library float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) { // Only send humidity if it changed since the last measurement or if we didn't send an update for n times lastHum = humidity; // Reset no updates counter nNoUpdatesHum = 0; send(msgHum.set(humidity, 1)); #ifdef MY_DEBUG Serial.print("Humidity: "); Serial.println(humidity); #endif } else { // Increase no update counter if the humidity stayed the same nNoUpdatesHum++; } // Sleep for a while to save energy //sleep(UPDATE_INTERVAL); { ///////////////////////////////////////////// ////////// Battery Reporting Code /////////// ///////////////////////////////////////////// // get the battery Voltage int sensorValue = analogRead(BATTERY_SENSE_PIN); #ifdef MY_DEBUG Serial.println(sensorValue); #endif // 1M, 470K divider across battery and using internal ADC ref of 1.1V // Sense point is bypassed with 0.1 uF cap to reduce noise at that point // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts // 3.44/1023 = Volts per bit = 0.003363075 int batteryPcnt = sensorValue / 10; #ifdef MY_DEBUG float batteryV = sensorValue * 0.003363075; float voltage = sensorValue * 0.003363075; Serial.print("Battery Voltage: "); Serial.print(batteryV); Serial.println(" V"); Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %"); #endif if (oldBatteryPcnt != batteryPcnt) { // Power up radio after sleep sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; send(voltageMsg.set(voltage,2)); } // sleep(SLEEP_TIME); } ////////////////////////////////////////////////// ////////// BMP180 Pressure Sensor Code /////////// ////////////////////////////////////////////////// float pressure = bmp.readSealevelPressure(ALTITUDE) / 100.0; float temperature = bmp.readTemperature(); if (!metric) { // Convert to fahrenheit temperature = temperature * 9.0 / 5.0 + 32.0; } int forecast = sample(pressure); Serial.print("Temperature = "); Serial.print(temperature); Serial.println(metric ? " *C" : " *F"); Serial.print("Pressure = "); Serial.print(pressure); Serial.println(" hPa"); Serial.print("Forecast = "); Serial.println(weather[forecast]); if (temperature != lastTemp) { send(tempMsg.set(temperature, 1)); lastTemp = temperature; } if (pressure != lastPressure) { send(pressureMsg.set(pressure, 0)); lastPressure = pressure; } if (forecast != lastForecast) { send(forecastMsg.set(weather[forecast])); lastForecast = forecast; } sleep(SLEEP_TIME); } float getLastPressureSamplesAverage() { float lastPressureSamplesAverage = 0; for (int i = 0; i < LAST_SAMPLES_COUNT; i++) { lastPressureSamplesAverage += lastPressureSamples[i]; } lastPressureSamplesAverage /= LAST_SAMPLES_COUNT; return lastPressureSamplesAverage; } ////////////////////////////////////////// ////////// Forecast Algorithm /////////// ///////////////////////////////////////// int sample(float pressure) { // Calculate the average of the last n minutes. int index = minuteCount % LAST_SAMPLES_COUNT; lastPressureSamples[index] = pressure; minuteCount++; if (minuteCount > 185) { minuteCount = 6; } if (minuteCount == 5) { pressureAvg = getLastPressureSamplesAverage(); } else if (minuteCount == 35) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change * 2; // note this is for t = 0.5hour } else { dP_dt = change / 1.5; // divide by 1.5 as this is the difference in time from 0 value. } } else if (minuteCount == 65) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) //first time initial 3 hour { dP_dt = change; //note this is for t = 1 hour } else { dP_dt = change / 2; //divide by 2 as this is the difference in time from 0 value } } else if (minuteCount == 95) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 1.5; // note this is for t = 1.5 hour } else { dP_dt = change / 2.5; // divide by 2.5 as this is the difference in time from 0 value } } else if (minuteCount == 125) { float lastPressureAvg = getLastPressureSamplesAverage(); pressureAvg2 = lastPressureAvg; // store for later use. float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 2; // note this is for t = 2 hour } else { dP_dt = change / 3; // divide by 3 as this is the difference in time from 0 value } } else if (minuteCount == 155) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 2.5; // note this is for t = 2.5 hour } else { dP_dt = change / 3.5; // divide by 3.5 as this is the difference in time from 0 value } } else if (minuteCount == 185) { float lastPressureAvg = getLastPressureSamplesAverage(); float change = (lastPressureAvg - pressureAvg) * CONVERSION_FACTOR; if (firstRound) // first time initial 3 hour { dP_dt = change / 3; // note this is for t = 3 hour } else { dP_dt = change / 4; // divide by 4 as this is the difference in time from 0 value } pressureAvg = pressureAvg2; // Equating the pressure at 0 to the pressure at 2 hour after 3 hours have past. firstRound = false; // flag to let you know that this is on the past 3 hour mark. Initialized to 0 outside main loop. } int forecast = UNKNOWN; if (minuteCount < 35 && firstRound) //if time is less than 35 min on the first 3 hour interval. { forecast = UNKNOWN; } else if (dP_dt < (-0.25)) { forecast = THUNDERSTORM; } else if (dP_dt > 0.25) { forecast = UNSTABLE; } else if ((dP_dt > (-0.25)) && (dP_dt < (-0.05))) { forecast = CLOUDY; } else if ((dP_dt > 0.05) && (dP_dt < 0.25)) { forecast = SUNNY; } else if ((dP_dt >(-0.05)) && (dP_dt < 0.05)) { forecast = STABLE; } else { forecast = UNKNOWN; } // uncomment when debugging Serial.print(F("Forecast at minute ")); Serial.print(minuteCount); Serial.print(F(" dP/dt = ")); Serial.print(dP_dt); Serial.print(F("kPa/h --> ")); Serial.println(weather[forecast]); return forecast; }
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Great work @JCH, thanks for reporting back and for sharing the sketch.
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So after running this weather station for a few weeks i decided to switch out the lux sensor for a soil moisture sensor without modifying the code....
The readings are working but they are very up and down.... they are not a steady decline..... how are people measuring the analog values of soil moisture ?
