i am trying to get data from my realtime database so i can send it to my esp. but i in the serial monitor i get the error 'data type mismatch' can anyone help?
#include <Arduino.h>
#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"
// Insert your network credentials
#define WIFI_SSID "techniek"
#define WIFI_PASSWORD "test1234"
// Insert Firebase project API Key
#define API_KEY "API_KEY"
// Insert RTDB URLefine the RTDB URL */
#define DATABASE_URL "DATABASE_URL"
//Define Firebase Data object
FirebaseData fbdo;
FirebaseAuth auth;
FirebaseConfig config;
unsigned long sendDataPrevMillis = 0;
float CO2;
bool signupOK = false;
void setup() {
Serial.begin(115200);
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
Serial.print("Connecting to Wi-Fi");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(300);
}
Serial.println();
Serial.print("Connected with IP: ");
Serial.println(WiFi.localIP());
Serial.println();
/* Assign the api key (required) */
config.api_key = API_KEY;
/* Assign the RTDB URL (required) */
config.database_url = DATABASE_URL;
/* Sign up */
if (Firebase.signUp(&config, &auth, "", "")) {
Serial.println("ok");
signupOK = true;
}
else {
Serial.printf("%s\n", config.signer.signupError.message.c_str());
}
/* Assign the callback function for the long running token generation task */
config.token_status_callback = tokenStatusCallback; //see addons/TokenHelper.h
Firebase.begin(&config, &auth);
Firebase.reconnectWiFi(true);
}
void loop() {
if (Firebase.ready() && signupOK && (millis() - sendDataPrevMillis > 15000 || sendDataPrevMillis == 0)) {
sendDataPrevMillis = millis();
if (Firebase.RTDB.getFloat(&fbdo, "/test/float")) {
if (fbdo.dataType() == "float") {
CO2 = fbdo.floatData();
Serial.println(CO2);
}
}
else {
Serial.println(fbdo.errorReason());
}
}
}