How can i do it? espnow ? mesh ?
This would be simple using ESPNow but why do you need 3 boards to do it ? How far apart are the 2 boards with the pressure sensors ?
Use ESPNOW.
it's for an industrial application, the boards the distance between the boards can be up to 15 meters. We need a central board to receive every single pressure and send back all the pressure to each sender which will make the comparsion and the action.
Industrial application, better yet, use a Raspberry Pi as a MQTT Broker and have the ESP32's as MQTT clients.
problem is the espnow examples i see is just to send data from many to one but how to send back the data received on the receiver side to the senders?
Use a Raspberry Pi as a MQTT Broker and have the ESP32's as MQTT clients. As MQTT clients the ESP32's can send and receive info from the MQTT Broker.
The ESP32's can then only 'see' the Raspberry Pi as being the network. Keeping the ESP32's off the main network and then have only the Raspberry Pi be connected to the main network and source controller for the ESP's.
Node-Red can be used on the Raspberry Pi as a control center or write your own using C++ or Python. I used Python.
If the 2 boards with the pressure sensors can communicate over that distance then you don't need a third board
Take a look at 2 way communication in Getting Started with ESP-NOW (ESP32 with Arduino IDE) | Random Nerd Tutorials
in fact there is more than two boards that's why i need to process it on a central board.
You still only need as many boards as there are pressure sensors but with more than 2 the MQTT would be a neater way to do it
Use a PC or get a Raspberry Pi to use as a MQTT Broker. Setup the ESP32's as MQTT clients. Connect 1000's of clients.
do you have an example how to do that with MQTT ?
ESP32 MQTT client.
#include <WiFi.h>
#include <PubSubClient.h>
#include "certs.h" // include the connection infor for WiFi and MQTT
#include "sdkconfig.h" // used for log printing
#include "esp_system.h"
#include "freertos/FreeRTOS.h" //freeRTOS items to be used
#include "freertos/task.h"
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include "Adafruit_BME680.h"
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <driver/adc.h>
#include "esp32-hal-ledc.h"
#include <HardwareSerial.h>
#include <SimpleKalmanFilter.h>
#include "MHZ19.h"
#include <ESP32Time.h>
#include <SolarCalculator.h>
////
ESP32Time rtc;
MHZ19 myMHZ19;
////
Adafruit_BME680 bme( GPIO_NUM_5 ); // use hardware SPI, set GPIO pin to use
//Adafruit_ST7789 tft = Adafruit_ST7789( TFT_CS , TFT_DC , TFT_MOSI , TFT_SCLK , TFT_RST );
Adafruit_ST7789 tft = Adafruit_ST7789( GPIO_NUM_15, GPIO_NUM_0, GPIO_NUM_13, GPIO_NUM_14, GPIO_NUM_22 );
WiFiClient wifiClient; // do the WiFi instantiation thing
PubSubClient MQTTclient( mqtt_server, mqtt_port, wifiClient ); //do the MQTT instantiation thing
//////
#define evtDoParticleRead ( 1 << 0 ) // declare an event
#define evtWaitForBME ( 1 << 1 )
#define evtParseMQTT ( 1 << 3 )
EventGroupHandle_t eg; // variable for the event group handle
//////
QueueHandle_t xQ_WindChillDewPoint;
QueueHandle_t xQ_eData; // environmental data to be displayed on the screen
struct stu_eData
{
float Temperature = 0.0f;
float Pressure = 0.0f;
float Humidity = 0.0f;
float IAQ = 0.0f; // Index Air Quality
float RM0 = 0.0f; // Remaining Moisture from sensor 0
float PM2 = 0.0f; // particles in air
float WS = 0.0f; // wind speed
String WD = ""; // wind direction
float RF = 0.0f; // rainfall
float WSV = 0.0f; // weather station volts
float WSC = 0.0f; // weather station current
float WSP = 0.0f; // weather station power
float WindChill = 0.0f; //windchill
float DewPoint = 0.0f; //dew point or dew index
int SunRiseHr = 0; // sunrise hour
int SunRiseMin = 0; //sunrise minute
int SunSetHr = 0; //sunset hour
int SunSetMin = 0; //sunset minute
int DuskHr = 0; //dusk
int DuskMin = 0; //dusk
int DawnHr = 0; // dawn
int DawnMin = 0; // dawn
int TransitHr = 0; // 'noon' time
int TransitMin = 0; // 'noon' time
double azimuth = 0.0f; // Sun's azimuth, in degrees
double elevation = 0.0f; // Sun's elevation, in degrees
float CO2 = 0.0f;
} x_eData; // environmental data
QueueHandle_t xQ_Message; // payload and topic queue of MQTT payload and topic
const int payloadSize = 100;
struct stu_message
{
char payload [payloadSize] = {'\0'};
String topic ;
} x_message;
////
const float oGasResistanceBaseLine = 149598.0f;
int mqttOK = 0;
volatile bool TimeSet = false;
//////
esp_timer_handle_t oneshot_timer; //veriable to store the hardware timer handle
//////
SemaphoreHandle_t sema_MQTT_KeepAlive;
SemaphoreHandle_t sema_PublishPM;
SemaphoreHandle_t sema_mqttOK;
////
//serial(2) = pin25 RX, pin26 TX
HardwareSerial co2Serial ( 2 );
//////
// interrupt service routine for WiFi events put into IRAM
void IRAM_ATTR WiFiEvent(WiFiEvent_t event)
{
switch (event) {
break;
default: break;
}
} // void IRAM_ATTR WiFiEvent(WiFiEvent_t event)
//////
//void IRAM_ATTR oneshot_timer_callback( void* arg )
// case SYSTEM_EVENT_STA_CONNECTED:
// log_i("Connected to WiFi access point");
// break;
// case SYSTEM_EVENT_STA_DISCONNECTED:
// log_i("Disconnected from WiFi access point");
// break;
// case SYSTEM_EVENT_AP_STADISCONNECTED:
// log_i("WiFi client disconnected");
//{
// BaseType_t xHigherPriorityTaskWoken;
// xEventGroupSetBitsFromISR( eg, evtDoParticleRead, &xHigherPriorityTaskWoken );
//} //void IRAM_ATTR oneshot_timer_callback( void* arg )
//////
void IRAM_ATTR mqttCallback(char* topic, byte * payload, unsigned int length)
{
memset( x_message.payload, '\0', payloadSize ); // clear payload char buffer
x_message.topic = ""; //clear topic string buffer
x_message.topic = topic; //store new topic
int i = 0; // extract payload
for ( i; i < length; i++)
{
x_message.payload[i] = ((char)payload[i]);
}
x_message.payload[i] = '\0';
xQueueOverwrite( xQ_Message, (void *) &x_message );// send data to queue
} // void mqttCallback(char* topic, byte* payload, unsigned int length)
////
void setup()
{
co2Serial.begin( 9600 , SERIAL_8N1, 25, 26 ); // pin25 RX, pin26 TX
x_eData.WD.reserve(50);
x_message.topic.reserve( payloadSize );
xQ_WindChillDewPoint = xQueueCreate( 1, sizeof(stu_eData) );
xQ_Message = xQueueCreate( 1, sizeof(stu_message) );
xQ_eData = xQueueCreate( 1, sizeof(stu_eData) ); // sends a queue copy of the structure
//
sema_PublishPM = xSemaphoreCreateBinary();
xSemaphoreGive( sema_PublishPM );
sema_mqttOK = xSemaphoreCreateBinary();
xSemaphoreGive( sema_mqttOK );
//
ledcSetup( 4, 12000, 8 ); // ledc: 4 => Group: 0, Channel: 2, Timer: 1, led frequency, resolution bits
ledcAttachPin( GPIO_NUM_12, 4 ); // gpio number and channel
ledcWrite( 4, 0 ); // write to channel number 4
//
eg = xEventGroupCreate(); // get an event group handle
// output mode
gpio_config_t io_cfg = {}; // initialize the gpio configuration structure
io_cfg.mode = GPIO_MODE_OUTPUT; // set gpio mode
io_cfg.pin_bit_mask = ( (1ULL << GPIO_NUM_4) ); //bit mask of the pins to set
gpio_config(&io_cfg); // configure the gpio based upon the parameters as set in the configuration structure
gpio_set_level( GPIO_NUM_4, LOW); // set air particle sensor trigger pin to LOW
// input mode
io_cfg = {}; // reinitialize the gpio configuration structure
io_cfg.mode = GPIO_MODE_INPUT; // set gpio mode. GPIO_NUM_0 input from water level sensor
io_cfg.pin_bit_mask = ( (1ULL << GPIO_NUM_0) | (1ULL << GPIO_NUM_27) ); //bit mask of the pins to set, assign gpio number to be configured
gpio_config(&io_cfg); // configure the gpio based upon the parameters as set in the configuration structure
// set up A:D channels, refer: https://dl.espressif.com/doc/esp-idf/latest/api-reference/peripherals/adc.html
adc1_config_width(ADC_WIDTH_12Bit);
adc1_config_channel_atten(ADC1_CHANNEL_0, ADC_ATTEN_DB_11);// using GPIO 36
// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/esp_timer.html?highlight=hardware%20timer High Resoultion Timer API
//esp_timer_create_args_t oneshot_timer_args = {}; // initialize High Resoulition Timer (HRT) configuration structure
//oneshot_timer_args.callback = &oneshot_timer_callback; // configure for callback, name of callback function
//esp_timer_create( &oneshot_timer_args, &oneshot_timer ); // assign configuration to the HRT, receive timer handle
//
xTaskCreatePinnedToCore( fparseMQTT, "fparseMQTT", 7000, NULL, 5, NULL, 1 );
xTaskCreatePinnedToCore( MQTTkeepalive, "MQTTkeepalive", 5000, NULL, 6, NULL, 1 );
xTaskCreatePinnedToCore( DoTheBME680Thing, "DoTheBME280Thing", 20000, NULL, 5, NULL, 1);
//xTaskCreatePinnedToCore( fDoParticleDetector, "fDoParticleDetector", 6000, NULL, 3, NULL, 1 );
xTaskCreatePinnedToCore( fmqttWatchDog, "fmqttWatchDog", 5000, NULL, 3, NULL, 1 );
xTaskCreatePinnedToCore( fDoTheDisplayThing, "fDoTheDisplayThing", 23000, NULL, 3, NULL, 1 );
xTaskCreatePinnedToCore( fScreenBlanking, "fScreenBlanking", 2000, NULL, 2, NULL, 1 );
xTaskCreatePinnedToCore( fGetCO2, "fGetCO2", 4500, NULL, 2, NULL, 1 );
xTaskCreatePinnedToCore( fParseDewPointWindChill, "fParseDewPointWindChill", 4500, NULL, 2, NULL, 1 );
xTaskCreatePinnedToCore( fSolarCalculations, "fSolarCalculations", 10000, NULL, 2, NULL, 1 );
} //void setup()
////
void fSolarCalculations ( void *pvParameters )
{
double sunrise; // Sunrise, in hours (UTC)
double transit; // Solar noon, in hours (UTC)
double sunset; // Sunset, in hours (UTC)
double dawn; // Civil dawn, in hours (UTC)
double dusk; // Civil dusk, in hours (UTC)
//double rt_ascension; // Sun's right ascension, in degrees
//double declination; // Sun's declination, in degrees
const float time_zone = -7.0f;
TickType_t xLastWakeTime = xTaskGetTickCount();
const TickType_t xFrequency = 1000; //delay for mS
int count = 3590;
int monthX = 1;
int dayX = 1;
for (;;)
{
if ( count % 60 == 0 )
{
if ( (rtc.getHour(true) >= 12) & (rtc.getHour(true) <= 23) )
{
dayX = 0;
} else {
dayX = 1;
}
calcSunriseSunset( rtc.getYear(), (rtc.getMonth() + monthX) , (rtc.getDay() + dayX), latitude, longitude, transit, sunrise, sunset ); // Calculate the times of sunrise, transit and sunset
sunrise += time_zone;
sunset += time_zone;
SolarTimeFormat( sunrise, 0 );
SolarTimeFormat( sunset, 1 );
calcCivilDawnDusk( rtc.getYear(), (rtc.getMonth() + monthX) , rtc.getDay(), latitude, longitude, transit, dawn, dusk); // Calculate the times of civil dawn and dusk (UTC)
transit += time_zone;
dawn += time_zone;
dusk += time_zone;
SolarTimeFormat( dawn, 2 );
SolarTimeFormat( dusk, 3 );
SolarTimeFormat( transit, 4 );
calcHorizontalCoordinates( rtc.getYear(), (rtc.getMonth() + monthX) , rtc.getDay(), rtc.getHour(true) , rtc.getMinute(), rtc.getSecond(), latitude, longitude, x_eData.azimuth, x_eData.elevation );
x_eData.azimuth = double(round(x_eData.azimuth * 100)) / 100; // Round to two decimal places
x_eData.elevation = double(round(x_eData.elevation * 100)) / 100;
if (count >= 3600 )
{
SolarTimeFormat( 0.0f, 5 ); // publish MQTT
log_i( "Hour:%d Azimuth %f, elevation %f, transit %dhr %dmin, dawn %dhr %dmin, dusk %dhr %dmin", rtc.getHour(true), x_eData.azimuth, x_eData.elevation, x_eData.TransitHr, x_eData.TransitMin, x_eData.DawnHr, x_eData.DawnMin, x_eData.DuskHr, x_eData.DuskMin );
count = 0;
}
}
//log_i( " high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
xLastWakeTime = xTaskGetTickCount();
vTaskDelayUntil( &xLastWakeTime, xFrequency );
count++;
} //for (;;)
vTaskDelete( NULL );
} //void fSolarCalculations ( )
////
void SolarTimeFormat( double h, int i )
{
int hours = 0;
int minutes = 0;
if ( h != 0.0f )
{
int m = int(round(h * 60));
hours = (m / 60) % 24;
minutes = m % 60;
}
switch ( i )
{
case 0:
x_eData.SunRiseHr = hours;
x_eData.SunRiseMin = minutes;
break;
case 1:
x_eData.SunSetHr = hours;
x_eData.SunSetMin = minutes;
break;
case 2:
x_eData.DawnHr = hours;
x_eData.DawnMin = minutes;
break;
case 3:
x_eData.DuskHr = hours;
x_eData.DawnMin = minutes;
break;
case 4:
x_eData.TransitHr = hours;
x_eData.TransitMin = minutes;
break;
case 5:
String sTopic = "";
sTopic.reserve( 35 );
sTopic.concat( String(x_eData.SunRiseHr) + "," );
sTopic.concat( String(x_eData.SunRiseMin) + "," );
sTopic.concat( String(x_eData.SunSetHr) + "," );
sTopic.concat( String(x_eData.SunSetMin) + "," );
sTopic.concat( String(x_eData.DawnHr) + "," );
sTopic.concat( String(x_eData.DawnMin) + "," );
sTopic.concat( String(x_eData.TransitHr) + "," );
sTopic.concat( String(x_eData.TransitMin) );
xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
MQTTclient.publish( topicSRSSDDT, sTopic.c_str() );
xSemaphoreGive( sema_MQTT_KeepAlive );
sTopic = "";
sTopic.concat( String(x_eData.azimuth) + "," + String(x_eData.elevation) );
xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
MQTTclient.publish( topicAzEle, sTopic.c_str() );
xSemaphoreGive( sema_MQTT_KeepAlive );
sTopic = "";
break;
} // switch ( i ) {
} // void SolarTimeFormat( double h, int i )
/*
250-400ppm Normal background concentration in outdoor ambient air
400-1,000ppm Concentrations typical of occupied indoor spaces with good air exchange
1,000-2,000ppm Complaints of drowsiness and poor air.
2,000-5,000 ppm Headaches, sleepiness and stagnant, stale, stuffy air. Poor concentration, loss of attention, increased heart rate and slight nausea may also be present.
5,000 Workplace exposure limit (as 8-hour TWA) in most jurisdictions.
>40,000 ppm Exposure may lead to serious oxygen deprivation resulting in permanent brain damage, coma, even death.
*/
void fParseDewPointWindChill( void *pvParameters )
{
while ( !MQTTclient.connected() )
{
vTaskDelay( 250 );
}
struct stu_message px_message;
String sDewPoint = "";
String sWindChill = "";
sDewPoint.reserve( payloadSize );
sWindChill.reserve( payloadSize );
for (;;)
{
if ( xQueueReceive(xQ_WindChillDewPoint, &px_message, portMAX_DELAY) == pdTRUE )
{
sDewPoint = px_message.payload;
int commaIndex = sDewPoint.indexOf(',');
sWindChill.concat ( sDewPoint.substring(0, commaIndex) );
sDewPoint.remove( 0, (commaIndex + 1) );
x_eData.WindChill = sWindChill.toFloat();
x_eData.DewPoint = sDewPoint.toFloat();
sDewPoint = "";
sWindChill = "";
}
//log_i( " high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
}
vTaskDelete( NULL );
}
////
void fGetCO2 ( void *pvParameters )
{
uint64_t TimePastKalman = esp_timer_get_time();
myMHZ19.begin( co2Serial );
myMHZ19.autoCalibration();
TickType_t xLastWakeTime = xTaskGetTickCount();
const TickType_t xFrequency = 1000; //delay for mS
SimpleKalmanFilter KF_CO2( 1.0f, 1.0f, .01f );
for ( ;; )
{
KF_CO2.setProcessNoise( (esp_timer_get_time() - TimePastKalman) / 1000000.0f );
x_eData.CO2 = KF_CO2.updateEstimate( myMHZ19.getCO2() ); // apply simple Kalman filter
TimePastKalman = esp_timer_get_time();
xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
MQTTclient.publish( topicCO2, String(round(x_eData.CO2)).c_str() );
xSemaphoreGive( sema_MQTT_KeepAlive );
// process wind chill and dew point
xLastWakeTime = xTaskGetTickCount();
vTaskDelayUntil( &xLastWakeTime, xFrequency );
//log_i( " high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
}
vTaskDelete( NULL );
} //void fMHZ19B ( void *pvParameters )
////
void fScreenBlanking( void *pvParameters )
{
int TimeOfPause = 10000 * 1000;
uint64_t PauseStartTime = esp_timer_get_time();
bool Pause = false;
const int brightness = 250;
int countUpDown = brightness;
for ( ;; )
{
if (!Pause )
{
//if motion detect then show display otherwise blank display
if ( !(gpio_get_level( GPIO_NUM_27)) )
{
for ( countUpDown; countUpDown-- > 0; )
{
ledcWrite( 4, countUpDown ); // write to channel number 4, dim backlight
vTaskDelay( 7 );
}
} else {
Pause = true;
PauseStartTime = esp_timer_get_time();
ledcWrite( 4, brightness );
countUpDown = brightness;
}
} else {
// still detecting movement reset blanking pause time
if ( gpio_get_level( GPIO_NUM_27) )
{
PauseStartTime = esp_timer_get_time(); // extend pause blanking time
}
if ( (esp_timer_get_time() - PauseStartTime) >= TimeOfPause )
{
Pause = false;
}
}
vTaskDelay( 250 );
}
vTaskDelete( NULL );
} //void fScreenBlanking( void *pvParameters )
//////
void fparseMQTT( void *pvParameters )
{
struct stu_message px_message;
for (;;)
{
if ( xQueueReceive(xQ_Message, &px_message, portMAX_DELAY) == pdTRUE )
{
xSemaphoreTake( sema_mqttOK, portMAX_DELAY );
mqttOK = 0;
xSemaphoreGive( sema_mqttOK );
if ( px_message.topic == topicRemainingMoisture_0 )
{
x_eData.RM0 = String(px_message.payload).toFloat();
}
if ( px_message.topic == topicWindSpeed )
{
x_eData.WS = String(px_message.payload).toFloat();
}
if ( px_message.topic == topicWindDirection )
{
x_eData.WD = "";
x_eData.WD = String(px_message.payload);
}
if ( px_message.topic == topicRainfall )
{
x_eData.RF = String(px_message.payload).toFloat();
}
if ( px_message.topic == topicWSVolts )
{
x_eData.WSV = String(px_message.payload).toFloat();
}
if ( px_message.topic == topicWSCurrent )
{
x_eData.WSC = String(px_message.payload).toFloat();
}
if ( px_message.topic == topicWSPower )
{
x_eData.WSP = String(px_message.payload).toFloat();
}
if ( px_message.topic == topicDPnWI )
{
xQueueSend( xQ_WindChillDewPoint, (void *) &px_message, 1 );
}
if ( String(px_message.topic) == topicOK )
{
if ( !TimeSet)
{
String temp = "";
temp.reserve(50);
temp.concat( String(px_message.payload[0]) );
temp.concat( String(px_message.payload[1]) );
temp.concat( String(px_message.payload[2]) );
temp.concat( String(px_message.payload[3]) );
int year = temp.toInt();
temp = "";
temp.concat( String(px_message.payload[5]) + String(px_message.payload[6]) );
int month = temp.toInt();
temp = "";
temp.concat(String(px_message.payload[8]) + String(px_message.payload[9]) );
int day = temp.toInt();
temp = "";
temp.concat( String(px_message.payload[11]) + String(px_message.payload[12]) );
int hour = temp.toInt();
temp = "";
temp.concat( String(px_message.payload[14]) + String(px_message.payload[15]) );
int min = temp.toInt();
rtc.setTime( 0, min, hour, day, month, year );
log_i( "rtc %s Year %d month %d day %d", rtc.getTime(), rtc.getYear(), (rtc.getMonth() + 1), rtc.getDay() );
TimeSet = true;
}
}
} //if ( xQueueReceive(xQ_Message, &px_message, portMAX_DELAY) == pdTRUE )
} //for(;;)
vTaskDelete( NULL );
} // void fparseMQTT( void *pvParameters )
////
void fDoTheDisplayThing( void * parameter )
{
tft.init( 240, 320 ); // Init ST7789 320x240
tft.setRotation( 3 );
tft.setTextSize( 3 );
tft.fillScreen( ST77XX_BLACK );
tft.setTextWrap( false );
struct stu_eData px_eData;
const int brightness = 250;
ledcWrite( 4, brightness ); //backlight set
const int MaxString = 20;
String oldTempString = "";
String oldHumidityString = "";
String oldAQIString = "";
String oldRainfall = "";
String oldWindDirection = "";
String oldAirPressure = "";
String oldRMO = "";
String oldPM2 = "";
//String oldPower = "";
String oldC02 = "";
oldHumidityString.reserve( MaxString );
oldWindDirection.reserve( MaxString );
oldAirPressure.reserve( MaxString );
oldTempString.reserve( MaxString );
oldAQIString.reserve( MaxString );
oldRainfall.reserve( MaxString );
//oldPower.reserve( MaxString );
oldRMO.reserve( MaxString );
oldPM2.reserve( MaxString );
oldC02.reserve( MaxString );
bool Tick = true;
const int numOfColors = 40;
/* https://chrishewett.com/blog/true-rgb565-colour-picker/#:~:text=A%20true%20RGB565%20colour%20picker%2021st%20Oct%202017,in%205%20bits%20and%20green%20in%206%20bits. */
int colors[numOfColors] = { ST77XX_BLACK, ST77XX_RED, ST77XX_WHITE, ST77XX_BLUE, ST77XX_GREEN, ST77XX_CYAN, ST77XX_MAGENTA, ST77XX_YELLOW, 0xd55b, 0xee09,
0x2e15, 0xcb43, 0x6bad, 0x126f, 0x1264, 0xe264, 0xe7e4, 0x87e4, 0x87fe, 0x876a,
0xe304, 0x1cc4, 0xf4c4, 0xf4da, 0xcf66, 0xa879, 0x7f28, 0x4f37, 0xfa97, 0x6195,
0X8162, 0xc962, 0x517b, 0x325b, 0xea5b, 0x179b, 0xff80, 0xf960, 0x416d, 0x7bd1
};
int colorCounter = 1;
for (;;)
{
if ( xQueueReceive(xQ_eData, &px_eData, portMAX_DELAY) == pdTRUE )
{
tft.setCursor( 0, 0 );
tft.setTextColor( colors[0] );
tft.print( oldTempString );
tft.setCursor( 0, 0 );
tft.setTextColor( colors[colorCounter] );
oldTempString = "";
if ( Tick )
{
oldTempString.concat( "iTemp " + String(px_eData.Temperature) + "F" );
} else {
oldTempString.concat( "Wind Chill " + String(px_eData.WindChill) + "F" );
}
tft.println( oldTempString );
tft.setCursor( 0, 30 );
tft.setTextColor( colors[0] );
tft.print( oldHumidityString );
tft.setCursor( 0, 30 );
tft.setTextColor( colors[colorCounter] );
oldHumidityString = "";
if ( Tick )
{
oldHumidityString.concat( "iHum " + String(px_eData.Humidity) + "%" );
} else {
if ( (px_eData.SunRiseHr < 10) & (px_eData.SunRiseMin < 10) )
{
oldHumidityString.concat( "sRise 0" + String(px_eData.SunRiseHr) + "0" + String(px_eData.SunRiseMin) );
}
if ( (px_eData.SunRiseHr >= 10) & (px_eData.SunRiseMin < 10) )
{
oldHumidityString.concat( "sRise " + String(px_eData.SunRiseHr) + "0" + String(px_eData.SunRiseMin) );
}
if ( (px_eData.SunRiseHr < 10) & (px_eData.SunRiseMin >= 10) )
{
oldHumidityString.concat( "sRise 0" + String(px_eData.SunRiseHr) + String(px_eData.SunRiseMin) );
}
if ( (px_eData.SunRiseHr >= 10) & (px_eData.SunRiseMin >= 10) )
{
oldHumidityString.concat( "sRise " + String(px_eData.SunRiseHr) + String(px_eData.SunRiseMin) );
}
}
tft.println( oldHumidityString );
tft.setCursor( 0, 60 );
tft.setTextColor( colors[0] );
tft.print( oldAirPressure );
tft.setCursor( 0, 60 );
tft.setTextColor( colors[colorCounter] );
oldAirPressure = "";
if ( Tick )
{
//oldAirPressure.concat( "Pres " + String(px_eData.Pressure) + "mmHg" );
oldAirPressure.concat( "Dew Pt. " + String(px_eData.DewPoint) + "F" );
} else {
if ( px_eData.SunSetMin < 10 )
{
oldAirPressure.concat( "sSet " + String(px_eData.SunSetHr) + "0" + String(px_eData.SunSetMin) );
}
if ( px_eData.SunRiseMin >= 10 )
{
oldAirPressure.concat( "sSet " + String(px_eData.SunSetHr) + String(px_eData.SunSetMin) );
}
}
tft.println( oldAirPressure );
tft.setCursor( 0, 90 );
tft.setTextColor( colors[0] );
tft.print( oldAQIString );
tft.setCursor( 0, 90 );
tft.setTextColor( colors[colorCounter] );
oldAQIString = "";
oldAQIString.concat( "iAQI " + String(px_eData.IAQ) + "%" );
tft.println( oldAQIString );
tft.setCursor( 0, 120 );
tft.setTextColor( colors[0] );
tft.print( oldRMO );
tft.setCursor( 0, 120 );
tft.setTextColor( colors[colorCounter] );
oldRMO = "";
//if ( Tick )
//{
oldRMO.concat( "iRM0 " + String(px_eData.RM0) + "%" );
//} else {
// oldRMO.concat( "iCO2 " + String(CO2) + "ppm" );
//}
tft.println( oldRMO );
tft.setCursor( 0, 150 );
tft.setTextColor( colors[0] );
tft.print( oldPM2 );
tft.setCursor( 0, 150 );
tft.setTextColor( colors[colorCounter] );
oldPM2 = "";
oldPM2.concat( "PM2 " + String(px_eData.PM2) + "ug/m3" );
tft.println( oldPM2 );
tft.setCursor( 0, 180 );
tft.setTextColor( colors[0] );
//tft.print( oldPower );
tft.print( oldC02 );
tft.setCursor( 0, 180 );
tft.setTextColor( colors[colorCounter] );
//oldPower = "";
oldC02 = "";
//oldPower.concat( String(px_eData.WSV) + " Volts" );
oldC02.concat( "iCO2 " + String(x_eData.CO2) + "ppm" );
//oldPower.concat( String(px_eData.WSV) + "V " + String(int(px_eData.WSC * 1000.0f)) + "mA " + String((int(px_eData.WSP * 1000.0f))) + "mW" );
//tft.println( oldPower );
tft.println( oldC02 );
colorCounter++;
if ( colorCounter > (numOfColors - 1) )
{
colorCounter = 1;
}
Tick = !Tick;
//log_i( " high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
} //if ( xQueueReceive(xQ_eData, &px_eData, portMAX_DELAY) == pdTRUE )
} //for (;;)
vTaskDelete( NULL );
} //void fDoTheDisplayTHing( void * parameter )
////
void fmqttWatchDog( void * paramater )
{
int UpdateImeTrigger = 86400; //seconds in a day
int UpdateTimeInterval = 86300; // 1st time update in 100 counts
int maxNonMQTTresponse = 15;
for (;;)
{
vTaskDelay( 1000 );
if ( mqttOK >= maxNonMQTTresponse )
{
ESP.restart();
}
xSemaphoreTake( sema_mqttOK, portMAX_DELAY );
mqttOK++;
xSemaphoreGive( sema_mqttOK );
UpdateTimeInterval++; // trigger new time get
if ( UpdateTimeInterval >= UpdateImeTrigger )
{
TimeSet = false; // sets doneTime to false to get an updated time after a days count of seconds
UpdateTimeInterval = 0;
}
}
vTaskDelete( NULL );
}
////
float fCalulate_IAQ_Index( int gasResistance, float Humidity)
{
float hum_baseline = 40.0f;
float hum_weighting = 0.25f;
float gas_offset = 0.0f;
float hum_offset = 0.0f;
float hum_score = 0.0f;
float gas_score = 0.0f;
gas_offset = oGasResistanceBaseLine - float( gasResistance );
hum_offset = float( Humidity ) - hum_baseline;
// calculate hum_score as distance from hum_baseline
if ( hum_offset > 0.0f )
{
hum_score = 100.0f - hum_baseline - hum_offset;
hum_score /= ( 100.0f - hum_baseline );
hum_score *= ( hum_weighting * 100.0f );
} else {
hum_score = hum_baseline + hum_offset;
hum_score /= hum_baseline;
hum_score *= ( 100.0f - (hum_weighting * 100.0f) );
}
//calculate gas score as distance from baseline
if ( gas_offset > 0.0f )
{
gas_score = float( gasResistance ) / oGasResistanceBaseLine;
gas_score *= ( 100.0f - (hum_weighting * 100.0f ) );
} else {
gas_score = 100.0f - ( hum_weighting * 100.0f );
}
return ( hum_score + gas_score );
} //void fCalulate_IAQ_Index( int gasResistance, float Humidity):
//////
//void fDoParticleDetector( void * parameter )
//{
// /*
// ug/m3 AQI Lvl AQ (Air Quality)
// (air Quality Index)
// 0-35 0-50 1 Excellent
// 35-75 51-100 2 Average
// 75-115 101-150 3 Light pollution
// 115-150 151-200 4 moderate
// 150-250 201-300 5 heavy
// 250-500 >=300 6 serious
// */
// float ADbits = 4095.0f;
// float uPvolts = 3.3f;
// float adcValue = 0.0f;
// float dustDensity = 0.0f;
// float Voc = 0.6f; // Set the typical output voltage, when there is zero dust.
// const float K = 0.5f; // Use the typical sensitivity in units of V per 100ug/m3.
// xEventGroupWaitBits (eg, evtWaitForBME, pdTRUE, pdTRUE, portMAX_DELAY );
// TickType_t xLastWakeTime = xTaskGetTickCount();
// const TickType_t xFrequency = 100; //delay for mS
// for (;;)
// {
// //enable sensor led
// gpio_set_level( GPIO_NUM_4, HIGH ); // set gpio 4 to high to turn on sensor internal led for measurement
// esp_timer_start_once( oneshot_timer, 280 ); // trigger one shot timer for a 280us timeout, warm up time.
// xEventGroupWaitBits (eg, evtDoParticleRead, pdTRUE, pdTRUE, portMAX_DELAY ); // event will be triggered by the timer expiring, wait here for the 280uS
// adcValue = float( adc1_get_raw(ADC1_CHANNEL_0) ); //take a raw ADC reading from the dust sensor
// gpio_set_level( GPIO_NUM_4, LOW );//Shut off the sensor LED
// adcValue = ( adcValue * uPvolts ) / ADbits; //calculate voltage
// dustDensity = (adcValue / K) * 100.0; //convert volts to dust density
// if ( dustDensity < 0.0f )
// {
// dustDensity = 0.00f; // make negative values a 0
// }
// if ( xSemaphoreTake( sema_PublishPM, 0 ) == pdTRUE ) // don't wait for semaphore to be available
// {
// xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
// //log_i( "ADC volts %f Dust Density = %ug / m3 ", adcValue, dustDensity ); // print the calculated voltage and dustdensity
// MQTTclient.publish( topicInsidePM, String(dustDensity).c_str() );
// xSemaphoreGive( sema_MQTT_KeepAlive );
// x_eData.PM2 = dustDensity;
// }
// xLastWakeTime = xTaskGetTickCount();
// vTaskDelayUntil( &xLastWakeTime, xFrequency );
// //log_i( " high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
// }
// vTaskDelete( NULL );
//}// end fDoParticleDetector()
////
void DoTheBME680Thing( void *pvParameters )
{
SPI.begin(); // initialize the SPI library
vTaskDelay( 10 );
if (!bme.begin()) {
log_i("Could not find a valid BME680 sensor, check wiring!");
while (1);
}
// Set up oversampling and filter initialization
bme.setTemperatureOversampling(BME680_OS_8X);
bme.setHumidityOversampling(BME680_OS_2X);
bme.setPressureOversampling(BME680_OS_4X);
bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
bme.setGasHeater(320, 150); // 320*C for 150 ms
//wait for a mqtt connection
while ( !MQTTclient.connected() )
{
vTaskDelay( 250 );
}
xEventGroupSetBits( eg, evtWaitForBME );
TickType_t xLastWakeTime = xTaskGetTickCount();
const TickType_t xFrequency = 1000 * 15; //delay for mS
String bmeInfo = "";
bmeInfo.reserve( 100 );
for (;;)
{
x_eData.Temperature = bme.readTemperature();
x_eData.Temperature = ( x_eData.Temperature * 1.8f ) + 32.0f; // (Celsius x 1.8) + 32
x_eData.Pressure = bme.readPressure();
x_eData.Pressure = x_eData.Pressure / 133.3223684f; //converts to mmHg
x_eData.Humidity = bme.readHumidity();
x_eData.IAQ = fCalulate_IAQ_Index( bme.readGas(), x_eData.Humidity );
//log_i( " temperature % f, Pressure % f, Humidity % f IAQ % f", x_eData.Temperature, x_eData.Pressure, x_eData.Humidity, x_eData.IAQ);
bmeInfo.concat( String(x_eData.Temperature, 2) );
bmeInfo.concat( "," );
bmeInfo.concat( String(x_eData.Pressure, 2) );
bmeInfo.concat( "," );
bmeInfo.concat( String(x_eData.Humidity, 2) );
bmeInfo.concat( "," );
bmeInfo.concat( String(x_eData.IAQ, 2) );
xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY );
if ( MQTTclient.connected() )
{
MQTTclient.publish( topicInsideInfo, bmeInfo.c_str() );
}
xSemaphoreGive( sema_MQTT_KeepAlive );
xSemaphoreGive( sema_PublishPM ); // release publish of dust density
xSemaphoreTake( sema_mqttOK, portMAX_DELAY );
mqttOK ++;
xSemaphoreGive( sema_mqttOK );
xQueueOverwrite( xQ_eData, (void *) &x_eData );// send data to display
//
bmeInfo = ""; // empty the string buffer
findDewPointWithHumidity( x_eData.Humidity, x_eData.Temperature );
xLastWakeTime = xTaskGetTickCount();
vTaskDelayUntil( &xLastWakeTime, xFrequency );
// log_i( "DoTheBME280Thing high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
}
vTaskDelete ( NULL );
}
////
/*
Important to not set vTaskDelay/vTaskDelayUntil to less then 10. Errors begin to develop with the MQTT and network connection.
makes the initial wifi/mqtt connection and works to keeps those connections open.
*/
void MQTTkeepalive( void *pvParameters )
{
sema_MQTT_KeepAlive = xSemaphoreCreateBinary();
xSemaphoreGive( sema_MQTT_KeepAlive ); // found keep alive can mess with a publish, stop keep alive during publish
MQTTclient.setKeepAlive( 90 ); // setting keep alive to 90 seconds makes for a very reliable connection, must be set before the 1st connection is made.
TickType_t xLastWakeTime = xTaskGetTickCount();
const TickType_t xFrequency = 250; //delay for ms
for (;;)
{
//check for a is-connected and if the WiFi 'thinks' its connected, found checking on both is more realible than just a single check
if ( (wifiClient.connected()) && (WiFi.status() == WL_CONNECTED) )
{
xSemaphoreTake( sema_MQTT_KeepAlive, portMAX_DELAY ); // whiles MQTTlient.loop() is running no other mqtt operations should be in process
MQTTclient.loop();
xSemaphoreGive( sema_MQTT_KeepAlive );
}
else {
log_i( "MQTT keep alive found MQTT status % s WiFi status % s", String(wifiClient.connected()), String(WiFi.status()) );
if ( !(wifiClient.connected()) || !(WiFi.status() == WL_CONNECTED) )
{
connectToWiFi();
}
connectToMQTT();
}
//log_i( " high watermark % d", uxTaskGetStackHighWaterMark( NULL ) );
xLastWakeTime = xTaskGetTickCount();
vTaskDelayUntil( &xLastWakeTime, xFrequency );
}
vTaskDelete ( NULL );
}
////
void connectToMQTT()
{
byte mac[5]; // create client ID from mac address
WiFi.macAddress(mac); // get mac address
String clientID = String(mac[0]) + String(mac[4]) ; // use mac address to create clientID
while ( !MQTTclient.connected() )
{
MQTTclient.connect( clientID.c_str(), mqtt_username, mqtt_password );
vTaskDelay( 250 );
}
MQTTclient.setCallback( mqttCallback );
MQTTclient.subscribe ( topicOK );
MQTTclient.subscribe ( topicRemainingMoisture_0 );
MQTTclient.subscribe ( topicWindSpeed );
MQTTclient.subscribe ( topicWindDirection );
MQTTclient.subscribe ( topicRainfall );
MQTTclient.subscribe ( topicWSVolts );
MQTTclient.subscribe ( topicWSCurrent );
MQTTclient.subscribe ( topicWSPower );
MQTTclient.subscribe ( topicDPnWI );
} //void connectToMQTT()
void connectToWiFi()
{
int TryCount = 0;
while ( WiFi.status() != WL_CONNECTED )
{
TryCount++;
WiFi.disconnect();
WiFi.begin( SSID, PASSWORD );
vTaskDelay( 4000 );
if ( TryCount == 10 )
{
ESP.restart();
}
}
WiFi.onEvent( WiFiEvent );
}
////vo
float findDewPointWithHumidity( float humi, float temperature )
{
//Celcius
float ans = (temperature - (14.55 + 0.114 * temperature) * (1 - (0.01 * humi)) - pow(((2.5 + 0.007 * temperature) * (1 - (0.01 * humi))), 3) - (15.9 + 0.117 * temperature) * pow((1 - (0.01 * humi)), 14));
//log_i( "%f", ans );
return ans;
}
void loop() { }
////
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