How do you send app inventor slider values to esp32 via firebase?

[andreasmon]

Hello,
i try to send app invertor slider position to esp32 via firebase.I try to convert the code of

2.- App Inventor sends number and text to ESP32 by Firebase. ESP32 sends to App Inventor random numbers from JuanAntonio in this link:

ESP32. FirebaseDB. Send. Receive. IDE Arduino

1.- Register in FireBase. Add Project. Project settings / Service accounts / Database secrets. Create database. Rules. You can look this process in: https://iotdesignpro.com/projects/iot-controlled-led-using-firebase-database-and-esp32 Here in Spanish with many images: http://kio4.com/arduino/117_Wemos_Firebase.htm We need a FirebaseURL.(example: https://kio4-3c240.firebaseio.com/) A key database secret (example: 1lzi12VLgShT…)

second example,but i can not make working..

Can anyone help me,or give me an example or link that app invertor send slider position to esp32 via firebase.

I search forum for this tutorial or example but i did not find any.

Thank you very much for any help.

[micheal]

thanks follow

[andreasmon]

i make some code and working,sliders in app invertor,firebase shows live values from sliders ,please look below pictures,but i can not make code to control brightness of a led. I try some code but no working,any help for arduino code... Thank you.

[andreasmon]

and the code i try but not shows values or change them...

#include <FirebaseESP32.h>
#include <WiFi.h>
FirebaseData firebaseData;

const char* ssid = "mywifi";
const char* password = "mypass";

String numero = "";
String texto = "";

unsigned long tiempo_actual = 0;

void setup() {
  Serial.begin(115200);
  delay(10);
  Serial.println();
  Serial.print("Connecting with ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
  delay(500);
  Serial.print(".");
  }
  
  Serial.println("");
  Serial.print("WiFi conected. IP: ");
  Serial.println(WiFi.localIP());

  Firebase.begin("mylink", "mykey");
}


void loop() {
  if (Firebase.getString(firebaseData, "/ESP32/numero")) {
      String numero_fb = firebaseData.stringData();
      if (numero_fb != numero) {
        numero = numero_fb;
        Serial.println(numero);
      }
    }

    if (Firebase.getString(firebaseData, "/ESP32/texto")) {
      String texto_fb = firebaseData.stringData();
      if (texto_fb != texto) {
        texto = texto_fb;
        Serial.println(texto);
      }
    }




  }

[Juan_Antonio]

If you send a number from the app to the ESP32, can you see it on the Serial Monitor?

Serial.println

[andreasmon]

before converting to work with sliders,yes he sent and print in serial monitor.
I use this code that App Inventor sends number and text to ESP32 by Firebase. ESP32 also sends to App Inventor random numbers

and try to converting to work with sliders.
after converting ,no error,firebase show values of 2 sliders,but serial show nothing.
i use code in 4# post

// Juan A. Villalpando
// http://kio4.com/arduino/117_Wemos_Firebase.htm

#include <FirebaseESP32.h>
#include <WiFi.h>
FirebaseData firebaseData;

const char* ssid = "Nombre_de_tu_Red_Wifi";
const char* password = "Clave_Red_Wifi";

String numero = "";
String texto = "";

unsigned long tiempo_actual = 0;

void setup() {
  Serial.begin(115200);
  delay(10);
  Serial.println();
  Serial.print("Connecting with ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
  delay(500);
  Serial.print(".");
  }
  
  Serial.println("");
  Serial.print("WiFi conected. IP: ");
  Serial.println(WiFi.localIP());

  Firebase.begin("https://kio4b-3c240.firebaseio.com/", "1lzi12VLgSecreto_de_la_base_de_datos");
}


void loop() {
  if (Firebase.getString(firebaseData, "/ESP32/numero")) {
      String numero_fb = firebaseData.stringData();
      if (numero_fb != numero) {
        numero = numero_fb;
        Serial.println(numero);
      }
    }

    if (Firebase.getString(firebaseData, "/ESP32/texto")) {
      String texto_fb = firebaseData.stringData();
      if (texto_fb != texto) {
        texto = texto_fb;
        Serial.println(texto);
      }
    }

// Send a random number every 3 seconds.
    if((millis()-tiempo_actual)>= 3000){
          String alea = (String) random(0,100);
          tiempo_actual = millis();
          Serial.println(alea);
          Firebase.setString(firebaseData, "/ESP32/aleatorio", alea);
    }
  
}

[andreasmon]

[andreasmon]

after converting ,no error,firebase show values of 2 sliders,but serial show nothing.
i use code in 4# post