Hi guys,
at the moment I must communicate sensor's data between Arduino and the ESP and push them on firebase via serial communication with a baud rate of 9600.
I want to know if there is a way to optimize my code since from my empirical experience there is a delay of about 8 seconds from when the value changes to when it's actually stored in the db.
Here I leave the Arduino UNO code:
//Libreries
#include <Adafruit_BMP085.h>
#include "DHT.h"
// Constants
#define DELAY 1000 // Delay between two measurements in ms
#define VIN 5 // V power voltage
#define R 10000 // Ohm resistance value
#define DHT11_PIN 6 // Pin connected to DHT11
#define DHTTYPE DHT11 // Type of sensor
const int sensorPin = A0; // Pin connected to photoresistor
//Variables
int16_t sensorVal; // Analog value from the sensor
int16_t lux; //Lux value
String values;
//Objects
Adafruit_BMP085 bmp;
DHT dht(DHT11_PIN, DHTTYPE);
void setup() {
Serial.begin(9600);
bmp.begin();
dht.begin();
delay(5000);
}
void loop()
{
lux=sensorRawToPhys(analogRead(sensorPin));
values= ((String)bmp.readTemperature()+','+(String)dht.readHumidity()+','+(String)bmp.readPressure()+','+(String)bmp.readAltitude(101500)+','+(String)lux);
delay(500);
// removed any buffered previous serial data.
Serial.flush();
delay(500);
// sent sensors data to serial (sent sensors data to ESP8266)
Serial.print(values);
delay(1000);
}
int sensorRawToPhys(int raw)
{
// Conversion rule
float Vout = float(raw) * (VIN / float(1023));// Conversion analog to voltage
float RLDR = (R * (VIN - Vout))/Vout; // Conversion voltage to resistance
int phys=500/(RLDR/1000); // Conversion resitance to lumen
return phys;
}
and here I leave the ESP01 ones:
#if defined(ESP32)
#include <WiFi.h>
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#endif
#include <Firebase_ESP_Client.h>
//Provide the token generation process info.
#include "addons/TokenHelper.h"
//Provide the RTDB payload printing info and other helper functions.
#include "addons/RTDBHelper.h"
/* 1. Define the WiFi credentials */
#define WIFI_SSID ""
#define WIFI_PASSWORD ""
/* 2. Define the API Key */
#define API_KEY ""
/* 3. Define the RTDB URL */
#define DATABASE_URL "" //<databaseName>.firebaseio.com or <databaseName>.<region>.firebasedatabase.app
/* 3. Define the project ID */
#define FIREBASE_PROJECT_ID ""
/* 4. Define the user Email and password that alreadey registerd or added in your project */
#define USER_EMAIL ""
#define USER_PASSWORD ""
//Define Firebase Data object
FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;
unsigned long sendDataPrevMillis = 0;
int count = 0;
String values;
void setup()
{
Serial.begin(9600);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
//Serial.print("Connecting to Wi-Fi");
while (WiFi.status() != WL_CONNECTED)
{
//Serial.print(".");
delay(300);
}
/*.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());
Serial.println();
Serial.printf("Firebase Client v%s\n\n", FIREBASE_CLIENT_VERSION);*/
/* Assign the api key (required) */
config.api_key = API_KEY;
/* Assign the user sign in credentials */
auth.user.email = USER_EMAIL;
auth.user.password = USER_PASSWORD;
/* Assign the RTDB URL (required) */
config.database_url = DATABASE_URL;
/* Assign the callback function for the long running token generation task */
config.token_status_callback = tokenStatusCallback; //see addons/TokenHelper.h
//Or use legacy authenticate method
//config.database_url = DATABASE_URL;
//config.signer.tokens.legacy_token = "<database secret>";
Firebase.begin(&config, &auth);
Firebase.reconnectWiFi(true);
}
void loop()
{
if (Firebase.ready() && (millis() - sendDataPrevMillis > 15000 || sendDataPrevMillis == 0))
{
bool Sr = false;
while(Serial.available())
{
//get sensor data from serial put in sensor_data
values = Serial.readString();
Sr = true;
}
delay(1000);
if (Sr == true)
{
//values=sensor_data;
//get comma indexes from values variable
int fristCommaIndex = values.indexOf(',');
int secondCommaIndex = values.indexOf(',', fristCommaIndex + 1);
int thirdCommaIndex = values.indexOf(',', secondCommaIndex + 1);
int fourthCommaIndex = values.indexOf(',', thirdCommaIndex + 1);
int fifthCommaIndex = values.indexOf(',', fourthCommaIndex + 1);
float temp = values.substring(0, fristCommaIndex).toFloat();
float hum = values.substring(fristCommaIndex + 1, secondCommaIndex).toFloat();
int pres = values.substring(secondCommaIndex + 1, thirdCommaIndex).toInt();
float alt = values.substring(thirdCommaIndex + 1, fourthCommaIndex).toFloat();
int lum = values.substring(fourthCommaIndex + 1, values.length()).toInt();
Firebase.RTDB.setFloatAsync(&fbdo, "/test/real/temp", temp);
Firebase.RTDB.setFloatAsync(&fbdo, "/test/real/hum", hum);
Firebase.RTDB.setIntAsync(&fbdo, "/test/real/pres", pres);
Firebase.RTDB.setFloatAsync(&fbdo, "/test/real/alt", alt);
Firebase.RTDB.setIntAsync(&fbdo, "/test/real/lum", lum);
Firebase.RTDB.setTimestamp(&fbdo, "/test/real/timestamp");
Firebase.RTDB.getDouble(&fbdo, "/test/real/timestamp");
double timeStamp = fbdo.to<uint64_t>()+7200;
Firebase.RTDB.setDoubleAsync(&fbdo, "/test/real/timestamp", timeStamp);
//delay(10);
if (count == 61)
{
FirebaseJson json;
json.add("temp", temp);
json.add("hum", hum);
json.add("pres", pres);
json.add("alt", alt);
json.add("lum", lum);
//Firebase.RTDB.getDouble(&fbdo, "/test/real/timestamp");
//Firebase.RTDB.getInt(&fbdo, "/test/real/timestamp");
json.add("timestamp", timeStamp);
Firebase.RTDB.pushJSONAsync(&fbdo, "/test/data", &json);
//Firebase.RTDB.updateNode(&fbdo, String("/test/data/" + fbdo.pushName()).c_str(), &json);
count=0;
}
count++;
}
}
}
is there a way to sync on the setup the two boards? And then, is there a way to optimize the way I send and fetch these data from board to board?
Thank you all in advance! 
